Power Steering System Cadillac Escalade GMT800

Fastener Tightening Specifications

Torque Specifications

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Begin the system diagnosis by reviewing the system Description and Operation. Reviewing the Description and Operation information will help you determine the correct symptom diagnostic procedure when a malfunction exists. Reviewing the Description and Operation information will also help you determine if the condition described by the customer is normal operation. Refer to SYMPTOMS - POWER STEERING SYSTEM in order to identify the correct procedure for diagnosing the system and where the procedure is located.

Important: Review the system description and operation in order to familiarize yourself with the system functions. Refer to POWER STEERING SYSTEM DESCRIPTION AND OPERATION .

Visual/Physical Inspection

1. Inspect for aftermarket devices which could affect the operation of the power steering system.
2. Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
3. Inspect the power steering reservoir for the proper power steering fluid level and condition.

Symptoms List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom

1. Power Steering Fluid Leaks, See «Power Steering Fluid Leaks»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system)
2. Rattle, Clunk, or Shudder Noise from the Power Steering System, See «Power Steering System Noise»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system)
3. Whine or Growl Noise from the Power Steering System (Without Hydraulic Brake Booster), See «Power Steering System Noise (Without Hydraulic Brake Booster)»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) or Whine or Growl Noise from the Power Steering System (With Hydraulic Brake Booster), See «Power Steering System Noise (With Hydraulic Brake Booster)»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system)
4. Steering Effort Hard in One or Both Directions, See «Steering Effort Hard»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system)
5. Steering Effort Too Easy in One or Both Directions, See «Steering Effort Too Easy»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system)

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Test Description

The numbers below refer to the step numbers on the diagnostic table.

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1. 3. This step tests the system for restrictions.
2. 5. This step tests the following components for the following conditions: The pump for Internal leaks The power steering pipes for kinks
3. 6. This step tests the ability of the pump to regulate flow at maximum pressure.
4. 8. This step tests the ability of the pump to regulate flow under normal operating conditions.
5. 10. This step tests the internal components of the pump and the gear.

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Tools Required

1. J 35555 Metal Mityvac
2. J 43485 Power Steering Bleeder Adapter

Important: Hoses touching the frame, body, or engine may cause system noise.

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1. Verify that the hoses do not touch any other part of the vehicle. Important: Loose connections may not leak, but could allow air into the steering system.
2. Verify that all hose connections are tight. NOTE: If the power steering system has been serviced, an accurate fluid level reading cannot be obtained unless air is bled from the steering system. The air in the fluid may cause pump cavitation noise and may cause pump damage over a period of time. Important: Maintain the fluid level throughout the bleed procedure.
3. Remove the pump reservoir cap. Important: Use clean, new power steering fluid only.
4. Fill the pump reservoir with fluid to the FULL COLD level.
5. Attach the J 43485 to the J 35555 or equivalent.
6. Place the J 43485 on or in the pump reservoir filler neck.
7. Apply a vacuum of 68 kPa (20 in Hg) maximum.
8. Wait 5 minutes. Typical vacuum drop is 7-10 kPa (2-3 in Hg). If the vacuum does not remain steady, refer to Excessive Vacuum Drop Diagnosis at the end of this procedure.
9. Remove the J 43485 and the J 35555 .
10. Reinstall the pump reservoir cap.
11. Start the engine. Allow the engine to idle.
12. Turn off the engine.
13. Verify the fluid level. Repeat steps 11-13 until the fluid stabilizes. Important: Do not turn steering wheel to lock.
14. Start the engine. Allow the engine to idle.
15. Turn the steering wheel 180-360 degrees in both directions 5 times.
16. Switch the ignition off. NOTE: When adding fluid or making a complete fluid change, always use the proper power steering fluid. Failure to use the proper fluid will cause hose and seal damage and fluid leaks.
17. Verify the fluid level.
18. Remove the pump reservoir cap.
19. Attach the J 43485 to the J 35555 or equivalent.
20. Place the J 43485 on or in the pump reservoir filler neck.
21. Apply a vacuum of 68 kPa (20 in Hg) maximum.
22. Wait 5 minutes.
23. Remove the J 43485 and the J 35555 .
24. Verify the fluid level.
25. Reinstall the pump reservoir cap.

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1. If the vacuum continues to drop, remove the pressure and return hose from the pump.
2. Install the plugs (1,2) supplied with the J 43485 into the pressure and return port.
3. Attach the J 43485 to the J 35555 or equivalent.
4. Place the J 43485 on or in the pump reservoir filler neck.
5. Apply a vacuum of 68 kPa (20 in Hg) maximum.
6. If the vacuum drops again, repair or replace the pump. If the vacuum holds steady, continue to check the other parts of the steering system. Important: Fluid must be free from bubbles and foam. Be aware of periodic bubbles that indicate a loose connection or leaking O-ring seal in the return hose or the pressure hose. Fluid must be free from discoloration.
7. Observe the fluid.
8. If condition persists, replace the following parts: The return hose clamps The return hose O-rings The pressure hose O-rings The gear cylinder line O-rings The reservoir to pump O-ring
9. Repeat the bleed procedure from the beginning.
10. Drive the vehicle approximately 16 km (10 mi) in order to warm the system to operating temperature. Evaluate vehicle on a smooth flat surface.
11. Verify the following conditions: There is smooth power assist. The vehicle operates quietly. The pump maintains the proper fluid level. There is not any leaking in the steering system. The fluid is free of foam or discoloration.

Checking and Adding Power Steering Fluid (Without Hydroboost)

Note. When adding fluid or making a complete fluid change, always use the proper power steering fluid. Failure to use the proper fluid will cause hose and seal damage and fluid leaks.

1. Clean the area surrounding the reservoir cap.
2. Remove the reservoir cap.
3. Inspect the power steering pump fluid level at regular intervals. Use the appropriate procedure below. Add fluid when required. Refer to Fluid and Lubricant Recommendations in Maintenance and Lubrication. Fluid Is Cold Remove the reservoir cap. Inspect the fluid level on the capstick. Ensure that the fluid level is between the bottom of the COLD/FULL mark and the end of the capstick. Fluid Is Hot Run the engine until the fluid reaches about 80°C(170°F). Turn the engine OFF. Remove the reservoir cap. Inspect the fluid level on the capstick. Ensure that the fluid level is between the HOT/FULL and the COLD/FULL marks on the capstick.
4. If the fluid level is low, add power steering fluid to the proper level.
5. Install the reservoir cap.
6. When checking the fluid level after servicing the steering system, bleed the air from the air from the system. Refer to «BLEEDING THE POWER STEERING SYSTEM»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) .

Checking and Adding Power Steering Fluid (With Hydroboost)

Note. When adding fluid or making a complete fluid change, always use the proper power steering fluid. Failure to use the proper fluid will cause hose and seal damage and fluid leaks.

1. If the power steering system has been serviced, bleed the power steering system to remove any trapped air from the system. Refer to «BLEEDING THE POWER STEERING SYSTEM»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) . Important: The oil level will appear falsely high if the hydro-boost accumulator is not fully charged. Do not apply the brake pedal with the engine off, this will discharge the hydro-boost accumulator.
2. Fully charge the hydro-boost accumulator using the following procedure: Start the engine. Firmly apply the brake pedal 2 to 3 times. Turn the engine Off. Important: The Add and Cold Full marks on the capstick are calculated for oil at ambient temperature. If the oil is hot, the oil level may appear slightly high.
3. Clean the area surrounding the reservoir cap.
4. Remove the reservoir cap. Important: The ideal oil level is between the Add and the Full Cold marks. Since overfilling is just as undesirable as under filling, there is no reason to full all the way up to the Full Cold mark.
5. Inspect the power steering pump fluid level at regular intervals. Add fluid when required.
6. If the fluid level is low, add power steering fluid to the proper level.
7. Install the reservoir cap.
8. When checking the fluid level after servicing the steering system, bleed the air from the system. Refer to «BLEEDING THE POWER STEERING SYSTEM»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) .

Important: Do not reuse any drained power steering fluid regardless of appearance or condition.

1. Turn off the engine.
2. Raise the front end of the vehicle off the ground until the tires and wheels turn freely. Refer to «LIFTING AND JACKING THE VEHICLE»(/cadillac/escalade/gmt800-2001-2006/remont/hoistjack/#jacking-and-lifting-avalanche__lifting-and-jacking-the-vehicle) in General Information.
3. Place a large container under the fluid return hose in order to collect the draining fluid.
4. Remove the fluid return hose at the power steering pump reservoir inlet connection.
5. Plug the reservoir return hose inlet connection on the power steering pump. Important: This step may require 4 L (4 qt) of power steering fluid until the draining fluid appears clear. Do not run the engine without the power steering fluid level at FULL COLD.
6. Run the engine at idle while an assistant maintains the fluid level at FULL COLD in the reservoir using new approved power steering fluid.
7. Turn off the engine.
8. Turn the steering wheel fully to the left and to the right.
9. Remove the plug from the pump reservoir inlet connection.
10. Install the fluid return hose to the pump reservoir.
11. Maintain the fluid level at FULL COLD.
12. Operate the engine at idle for approximately 15 minutes.
13. Repeat steps 3-5.
14. Inspect the power steering fluid for the following indications of contamination: Milky fluid - water Brown fluid - burnt Plastic debris or dirt chunks
15. If the fluid is contaminated, repeat steps 6-12 in order to complete a third flush.
16. Remove the plug from the pump reservoir inlet connection.
17. Install the fluid return hose to the pump reservoir.
18. Clean any spilled fluid.
19. Bleed the power steering system. Refer to «BLEEDING THE POWER STEERING SYSTEM»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system)

1. J 25034-C Power Steering Pump Pulley Remover
2. J 25033-C Power Steering Pump Pulley Installer

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1. Remove the upper fan shroud. Refer to FAN SHROUD REPLACEMENT - UPPER (W/O M74) or FAN SHROUD REPLACEMENT - UPPER (W/M74) in Engine Cooling.
2. Remove the drive belt. Refer to «DRIVE BELT REPLACEMENT -- ACCESSORY»(ref-180687-S16348846492005072800000) or «8.1L»(/cadillac/escalade/gmt800-2001-2006/remont/accessory-drive-belts/#cooling-system-specifications-drive-belt-routing__81l) in Engine Mechanical.
3. Remove the power steering pump pulley using the J25034-C .

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1. Place the power steering pump pulley on the end of the power steering pump shaft.
2. Install the power steering pump pulley using J 25033-C .
3. Ensure that the power steering pump pulley (1) is flush against the power steering pump shaft, with an allowable variance of 0.25 mm (0.010 in).
4. Install the drive belt. Refer to «DRIVE BELT REPLACEMENT -- ACCESSORY»(ref-180687-S16348846492005072800000) or «8.1L»(/cadillac/escalade/gmt800-2001-2006/remont/accessory-drive-belts/#cooling-system-specifications-drive-belt-routing__81l) in Engine Mechanical.
5. Install the upper fan shroud. Refer to FAN SHROUD REPLACEMENT - UPPER (W/O M74) or FAN SHROUD REPLACEMENT - UPPER (W/M74) in Engine Cooling.

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1. Remove the power steering pulley. Refer to «POWER STEERING PULLEY REPLACEMENT»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) .
2. Raise the vehicle. Refer to «LIFTING AND JACKING THE VEHICLE»(/cadillac/escalade/gmt800-2001-2006/remont/hoistjack/#jacking-and-lifting-avalanche__lifting-and-jacking-the-vehicle) in General Information.
3. Remove the oil pan skid plate bolts.
4. Remove the oil pan skid plate from the vehicle, if equipped.
5. Place a drain pan under the vehicle.
6. Remove the power steering pressure hose (2) from the power steering pump from underneath the vehicle.
7. Lower the vehicle.
8. Remove the clamps (3,5) retaining the power steering return hoses to the power steering pump and remove the hoses.
9. Remove the lower intermediate shaft from the steering gear. Refer to INTERMEDIATE STEERING SHAFT REPLACEMENT - LOWER in Steering Wheel and Column.
10. Remove the bolt retaining the rear bracket to the engine.
11. Remove the bolts from the front of the pump.
12. Remove the pump from the vehicle.
13. Remove the bracket (3) from the rear of the pump (1).

Installation Procedure

Note. Refer to FASTENER NOTICE in Cautions and Notices.

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1. Install the bracket (3) to the rear of the pump (1) Tighten Tighten the rear bracket retaining nuts to 50 N.m (37 lb ft).
2. Install the power steering pump.
3. Install the bolt retaining the rear bracket to the engine. Tighten Tighten the rear power steering bracket bolt to engine bracket to 50 N.m (37 lb ft).
4. Install the bolts to the front of the pump. Tighten Tighten the bolts to 50 N.m (37 lb ft).
5. Install the power steering pump return hoses (2,4) to the power steering pump and install the retaining clamps.
6. Raise the vehicle. Refer to «LIFTING AND JACKING THE VEHICLE»(/cadillac/escalade/gmt800-2001-2006/remont/hoistjack/#jacking-and-lifting-avalanche__lifting-and-jacking-the-vehicle) in General Information.
7. Install the power steering pressure hose (2) to the power steering pump. Tighten Tighten the nut to 28 N.m (20 lb ft).
8. Install the oil pan skid plate, if equipped.
9. Install the oil pan skid plate bolts. Tighten Tighten the retaining bolts to 20 N.m (15 lb ft).
10. Lower the vehicle.
11. Install the intermediate shaft. Refer to INTERMEDIATE STEERING SHAFT REPLACEMENT - LOWER .
12. Install the power steering pulley. Refer to «POWER STEERING PULLEY REPLACEMENT»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) .
13. Fill and bleed the power steering system. Refer to «BLEEDING THE POWER STEERING SYSTEM»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) .

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1. Place a drain pan under the vehicle.
2. Remove the power steering pulley. Refer to «POWER STEERING PULLEY REPLACEMENT»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) .
3. Remove the nut (1) and clamp (3) retaining the filler neck (1) to the power steering pump, if equipped.
4. Remove the bolts (2) from the front of the pump.
5. Remove the bolts retaining the power steering mounting bracket.
6. Remove the bolts (1) from the rear of the pump.
7. Remove the power steering return hoses (2,4) from the power steering pump.
8. Remove the power steering pressure hoses (2) from the power steering pump.
9. Remove the pump from the vehicle.
10. Remove the rear bracket from the power steering pump.

Note. Refer to FASTENER NOTICE in Cautions and Notices.

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1. Install the rear bracket to the power steering pump. Tighten Tighten the rear bracket retaining nuts to 50 N.m (37 lb ft).
2. Install the power steering pump to the vehicle.
3. Install the pressure hose (2) to the power steering pump. Tighten Tighten the hose fitting to 28 N.m (20 lb ft).
4. Install the power steering return hoses (2,4) and retaining clamps to the power steering pump.
5. Install the bolts (1) to the rear of the power steering pump. Tighten Tighten the rear bolts to 50 N.m (37 lb ft).
6. Install the power steering pump mounting bracket bolts. Tighten Tighten the mounting bracket bolts to 50 N.m (37 lb ft).
7. Install the bolts (2) to the front of the pump. Tighten Tighten the power steering pump retaining bolts to 50 N.m (37 lb ft).
8. Install the filler neck to the power steering pump.
9. Install the nut (1) and clamp (3) retaining the filler neck to the power steering pump. Tighten Tighten the filler neck retaining nut to 25 N.m (18 lb ft).
10. Fill and bleed the power steering system. Refer to «BLEEDING THE POWER STEERING SYSTEM»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) .

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1. Drain the power steering fluid from the power steering pump.
2. Remove the pump mounting studs (2).
3. Remove the connector and fitting assembly (4).
4. Remove the O-ring seal (3).
5. If replacement is required, remove the control valve assembly (2) and the flow control spring (3) from the pump housing assembly (1).
6. Remove the reservoir assembly (1) from the pump housing assembly (2).
7. Remove the O-ring seals (1) (4) (5).
8. Remove the magnet (3).
9. Clean the magnet (3).
10. Inspect the welch plug in the power steering pump housing (2). Do not remove. If the welch plug is deformed or dislodged, replace the power steering pump housing (2).

Assembly Procedure

Important: Use new O-ring seals when assembling the power steering pump assembly.

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1. Lubricate the O-ring seals (1) (4) (5) with power steering fluid.
2. Install the flow control spring (7) to the pump housing assembly (2).
3. Install the control valve assembly (6) to the flow control spring (7).
4. Install the O-ring seals (1) (4) (5) to the pump housing assembly.
5. Install the magnet (3) to the pump housing assembly (2).
6. Connect the reservoir assembly (1) to the pump housing assembly (2).
7. Install the O-ring seal. NOTE: Refer to «FASTENER NOTICE»(/cadillac/escalade/gmt800-2001-2006/remont/oem-general-information/#gm-vehicles-cautions-notices__fastener-notice) in Cautions and Notices.
8. Install the connector and fitting assembly (4) to the pump housing (1).
9. Install the pump mounting studs (2) to the pump housing (1). Tighten Tighten the pump mounting studs to 58 N.m (44 lb ft).
10. Tighten the connector and fitting assembly. Tighten Tighten the connector and fitting assembly to 75 N.m (55 lb ft).

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1. Drain the oil from the reservoir (1).
2. Remove the control valve assembly (3) from the pump housing (1). Make sure the flow control spring (4) does not fall out of the pump housing (1).
3. Remove the rectangular section seal (2) from the control valve assembly (3).

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1. Install the flow control spring (4) if removed from the pump housing (1).
2. Lubricate the new rectangular section seal (2) with power steering fluid.
3. Install the rectangular section seal (2) onto the control valve assembly (3).
4. Install the control valve assembly (3).

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1. Remove the front grille. Refer to GRILLE REPLACEMENT (CADILLAC) or GRILLE REPLACEMENT (AVALANCHE) in Exterior Trim. NOTE: Refer to «POWER STEERING HOSE DISCONNECTED NOTICE»(/cadillac/escalade/gmt800-2001-2006/remont/oem-general-information/#gm-vehicles-cautions-notices__power-steering-hose-disconnected-notice) in Cautions and Notices.
2. Place a drain pan under the vehicle.
3. Siphon the fluid from the reservoir to prevent excess spillage.
4. Remove the clamp retaining the power steering cooler inlet hose (3) to the power steering gear (2).
5. Remove the clamp retaining power steering cooler outlet hose (5) to the power steering pump (1).
6. Remove the bolts (2) retaining the power steering cooler from the radiator support.
7. Remove the power steering cooler from the vehicle.

Note. Refer to FASTENER NOTICE in Cautions and Notices.

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1. Install the power steering cooler (1) to the radiator support. Tighten Tighten the bolts retaining the power steering cooler to 5 N.m (44 lb in).
2. Install the power steering cooler outlet hose (3) to the power steering pump (2).
3. Install the retaining clamp.
4. Install the power steering inlet hose (5) to the power steering gear (1).
5. Install the retaining clamp.
6. Fill and bleed the power steering system. Refer to «BLEEDING THE POWER STEERING SYSTEM»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) .
7. Inspect all the hose connections for leaks.
8. Install the front grille. Refer to GRILLE REPLACEMENT (CADILLAC) or GRILLE REPLACEMENT (AVALANCHE) in Exterior Trim.

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1. Remove the front grille. Refer to GRILLE REPLACEMENT (CADILLAC) or GRILLE REPLACEMENT (AVALANCHE) in Exterior Trim. NOTE: Refer to «POWER STEERING HOSE DISCONNECTED NOTICE»(/cadillac/escalade/gmt800-2001-2006/remont/oem-general-information/#gm-vehicles-cautions-notices__power-steering-hose-disconnected-notice) in Cautions and Notices.
2. Remove the clamp retaining the power steering outlet hose (3) from the power steering gear (4).
3. Remove the clamp retaining the power steering inlet hose from the power steering pump (5).
4. Remove the bolts (2) retaining the power steering cooler from the radiator support.
5. Remove the power steering cooler from the vehicle.

Note. Refer to FASTENER NOTICE in Cautions and Notices.

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1. Install the power steering cooler (1) to the vehicle. Tighten Tighten the power steering cooler retaining bolts to 5 N.m (44 lb in).
2. Connect the power steering outlet hose (3) to the power steering gear (4).
3. Install the retaining clamp.
4. Connect the power steering inlet hose to the power steering pump.
5. Install the retaining clamp.
6. Bleed the power steering system. Refer to «BLEEDING THE POWER STEERING SYSTEM»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) .
7. Inspect all the hose connections for leaks.
8. Install the front grille. Refer to GRILLE REPLACEMENT (CADILLAC) or GRILLE REPLACEMENT (AVALANCHE) in Exterior Trim.

Removal Procedure

Note. Refer to POWER STEERING HOSE DISCONNECTED NOTICE in Cautions and Notices.

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1. Install a drain pan under the vehicle.
2. Remove the power steering gear inlet hose (1) from the brake booster.
3. Remove the power steering gear inlet hose from the power steering gear.
4. Remove the power steering gear inlet hose from the vehicle.

Note. Refer to INSTALLING HOSES WITHOUT TWISTS OR BENDS NOTICE in Cautions and Notices.

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1. Route the hose in the same position the hose occupied prior to removal.
2. Install the power steering gear inlet hose (1) to the brake booster (2). NOTE: Refer to «FASTENER NOTICE»(/cadillac/escalade/gmt800-2001-2006/remont/oem-general-information/#gm-vehicles-cautions-notices__fastener-notice) in Cautions and Notices.
3. Install the power steering gear inlet hose to the power steering gear. Tighten Tighten the power steering gear inlet hose fittings to 28 N.m (20 lb ft).
4. Remove the drain pan from under the vehicle.
5. Bleed the power steering system. Refer to «BLEEDING THE POWER STEERING SYSTEM»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) .

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1. Raise the vehicle. Refer to «LIFTING AND JACKING THE VEHICLE»(/cadillac/escalade/gmt800-2001-2006/remont/hoistjack/#jacking-and-lifting-avalanche__lifting-and-jacking-the-vehicle) in General Information.
2. Remove the engine protection shield. NOTE: Refer to «POWER STEERING HOSE DISCONNECTED NOTICE»(/cadillac/escalade/gmt800-2001-2006/remont/oem-general-information/#gm-vehicles-cautions-notices__power-steering-hose-disconnected-notice) in Cautions and Notices.
3. Install a drain pan under the vehicle.
4. Remove the power steering gear inlet hose (3) from the power steering pump (1).
5. Remove the power steering gear inlet hose from the power steering gear.
6. Remove the power steering gear inlet hose from the vehicle.

Note. Refer to INSTALLING HOSES WITHOUT TWISTS OR BENDS NOTICE in Cautions and Notices.

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1. Route the hose in the same position the hose occupied prior to removal.
2. Install the power steering gear inlet hose (3) to the power steering pump (1). NOTE: Refer to «FASTENER NOTICE»(/cadillac/escalade/gmt800-2001-2006/remont/oem-general-information/#gm-vehicles-cautions-notices__fastener-notice) in Cautions and Notices.
3. Install the power steering gear inlet hose to the power steering gear. Tighten Tighten the power steering gear inlet hose fittings to 28 N.m (20 lb ft).
4. Remove the drain pan from under the vehicle.
5. Install the engine protection shield.
6. Lower the vehicle.
7. Bleed the power steering system. Refer to «BLEEDING THE POWER STEERING SYSTEM»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) .

Note. Refer to POWER STEERING HOSE DISCONNECTED NOTICE in Cautions and Notices.

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1. Install a drain pan under the vehicle.
2. Remove the power steering gear outlet hose (3) from the steering gear (2).
3. Remove the clamp retaining the power steering gear outlet hose (3) to the power steering pump (1). Remove the power steering gear outlet hose from the power steering pump.
4. Remove the power steering gear outlet hose from the vehicle.

Note. Refer to INSTALLING HOSES WITHOUT TWISTS OR BENDS NOTICE in Cautions and Notices.

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1. Route the hose in the same position the hose occupied prior to removal.
2. Install the power steering gear outlet hose (3) to the power steering pump (1). Position the clamp at the end of the hose. NOTE: Refer to «FASTENER NOTICE»(/cadillac/escalade/gmt800-2001-2006/remont/oem-general-information/#gm-vehicles-cautions-notices__fastener-notice) in Cautions and Notices.
3. Install the power steering gear outlet hose to the power steering gear. Tighten Tighten the outlet hose fitting to 28 N.m (20 lb ft).
4. Remove the drain pan from under the vehicle.
5. Bleed the power steering system. Refer to «BLEEDING THE POWER STEERING SYSTEM»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) .

Note. Refer to POWER STEERING HOSE DISCONNECTED NOTICE in Cautions and Notices.

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1. Install a drain pan under the vehicle.
2. Remove the brake booster inlet hose (1) from the brake booster (2).
3. Remove the brake booster inlet hose from the power steering pump.
4. Remove the brake booster inlet hose from the vehicle.

Note. Refer to INSTALLING HOSES WITHOUT TWISTS OR BENDS NOTICE in Cautions and Notices.

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1. Route the hose in the same position the hose occupied prior to removal.
2. Install the brake booster inlet hose (1) to the brake booster (2). NOTE: Refer to «FASTENER NOTICE»(/cadillac/escalade/gmt800-2001-2006/remont/oem-general-information/#gm-vehicles-cautions-notices__fastener-notice) in Cautions and Notices.
3. Install the brake booster inlet hose to the power steering pump. Tighten Tighten the brake booster inlet hose fittings to 28 N.m (20 lb ft).
4. Remove the drain pan from under the vehicle.
5. Bleed the power steering system. Refer to «BLEEDING THE POWER STEERING SYSTEM»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) .

Note. Refer to POWER STEERING HOSE DISCONNECTED NOTICE in Cautions and Notices.

Scheme 73

1. Install a drain pan under the vehicle.
2. Remove the brake booster outlet hose (1) from the brake booster (2).
3. Remove the clamp retaining the brake booster outlet hose to the power steering pump.
4. Remove the brake booster outlet hose from the vehicle.

Note. The inlet and outlet hoses must not be twisted during installation. Do not bend or distort the inlet or outlet hoses to make installation easier. Failure to follow these procedures could result in component damage.

Scheme 74

1. Route the hose in the same position the hose occupied prior to removal.
2. Install the brake booster outlet hose (1) to the brake booster (2). Position the clamp at the end of the hose.
3. Install the brake booster outlet hose to the power steering pump (4). Position the clamp at the end of the hose.
4. Remove the drain pan from under the vehicle.
5. Bleed the power steering system. Refer to «BLEEDING THE POWER STEERING SYSTEM»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) .

Tools Required

1. J 6632-01 Pitman Arm Puller
2. J 24319-B Universal Steering Linkage Puller
3. J 29107-A Pitman Arm Puller

Scheme 75

Scheme 76

Scheme 77

Scheme 78

Scheme 79

1. Place a drain pan under the vehicle.
2. Remove the engine protection shield, if equipped. NOTE: Refer to «POWER STEERING HOSE DISCONNECTED NOTICE»(/cadillac/escalade/gmt800-2001-2006/remont/oem-general-information/#gm-vehicles-cautions-notices__power-steering-hose-disconnected-notice) in Cautions and Notices.
3. Remove the power steering hoses from the steering gear.
4. Cap the ends of the hoses and the power steering gear in order to prevent any entrance of dirt.
5. Disconnect the intermediate shaft from the steering gear. Refer to INTERMEDIATE STEERING SHAFT REPLACEMENT - LOWER in Steering Wheel and Column.
6. Remove the pitman arm to relay rod nut.
7. Disconnect the pitman arm from the relay rod using J 24319-B .
8. Remove the bolts retaining the steering gear to the frame.
9. Remove the steering gear from the vehicle.
10. Remove the pitman arm to the power steering gear retaining nut.
11. Remove the pitman arm from the power steering gear using J 6632-01 or J 29107-A .

Scheme 80

Scheme 81

Scheme 82

1. Install the pitman arm to the power steering gear. NOTE: Refer to «FASTENER NOTICE»(/cadillac/escalade/gmt800-2001-2006/remont/oem-general-information/#gm-vehicles-cautions-notices__fastener-notice) in Cautions and Notices.
2. Install the pitman arm to power steering gear retaining nut and washer. Tighten Tighten the nut to 250 N.m (184 lb ft).
3. Install the steering gear to the frame and install the retaining bolts. Tighten Tighten the bolts to 150 N.m (110 lb ft).
4. Install the pitman arm to the relay rod.
5. Install the pitman arm to the relay rod nut. Tighten Tighten the nut to 62 N.m (46 lb ft).
6. Install the intermediate shaft to the steering gear. Refer to INTERMEDIATE STEERING SHAFT REPLACEMENT - LOWER in Steering Wheel and Column.
7. Remove the caps or plugs from the steering gear and hoses.
8. Install the hoses to the steering gear. Tighten Tighten the hoses fittings to 28 N.m (20 lb ft).
9. Install the engine protection shield, if equipped.
10. Remove the safety stands.
11. Lower the vehicle.
12. Bleed the power steering system. Refer to «BLEEDING THE POWER STEERING SYSTEM»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) .

Worm Thrust Bearing Preload Adjustment - Off Vehicle (700 Gear)

Tools Required

1. J 42882 Adjuster Nut Socket
2. J 43435 Adjuster Lock Nut Wrench

Scheme 83

Scheme 84

Scheme 85

Scheme 86

Scheme 87

Scheme 88

1. Rotate the stub shaft back and forth in order to drain the power steering fluid.
2. Remove the coupling shield retainer and the lock nut from the steering gear housing using J 43435 and a torque wrench. NOTE: Refer to «FASTENER NOTICE»(/cadillac/escalade/gmt800-2001-2006/remont/oem-general-information/#gm-vehicles-cautions-notices__fastener-notice) in Cautions and Notices.
3. Turn the adjuster nut assembly (1) clockwise using J 42882 until the adjuster nut assembly (1) and the thrust support assembly (2) are firmly bottomed in the steering gear housing (3). Tighten Tighten the adjuster nut assembly (1) to 30 N.m (22 lb ft).
4. Place an index mark (1) on the steering gear housing (4) parallel with one of the holes (3) in the adjuster nut assembly (2).
5. Measure back counterclockwise 13 mm (1/2 in).
6. Place a second mark (2) on the steering gear housing (1).
7. Using J 42882 and a torque wrench, turn the adjuster nut assembly (1) counterclockwise 15-25 degrees to align the hole (2) in the adjuster nut assembly (1) with the second mark (4) on the steering gear housing (3).
8. Install the coupling shield retainer and the lock nut.
9. Hold the adjuster nut assembly in position to maintain alignment of the marks.
10. Tighten the coupling shield retainer and the lock nut using J 43435 and a torque wrench. Tighten Tighten the coupling shield retainer and the lock nut to 109 N.m (80 lb ft).
11. To adjust the pitman shaft, Refer to «PITMAN SHAFT OVER-CENTER PRELOAD ADJUSTMENT - OFF VEHICLE (670 GEAR)»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) or «PITMAN SHAFT OVER-CENTER PRELOAD ADJUSTMENT - OFF VEHICLE (700 GEAR)»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) .

Scheme 89

Scheme 90

Scheme 91

1. Rotate the stub shaft (3) back and forth to drain the power steering fluid.
2. Loosen the adjuster lock nut (4).
3. Turn the pitman shaft adjuster screw (1) counterclockwise until the screw is fully extended.
4. Turn the pitman shaft adjuster screw (1) clockwise 1 full turn.
5. Rotate the stub shaft (3) from stop to stop using a 12-point socket while counting the number of turns.
6. Starting at either stop, turn the stub shaft (3) back half of the total number of turns. This is the center of the gear.
7. Make sure that the gear is centered by checking the following items: The flat on the stub shaft (3) faces upward. The flat on the stub shaft (3) is parallel with the side cover (2).
8. Align the master spline (5) on the pitman shaft (4) with the adjuster screw (1).
9. Place a torque wrench on the stub shaft (2) with the handle in the vertical position.
10. Rotate the stub shaft (2) 45 degrees from each side of the center of the stub shaft. The stub shaft (2) must rotate smoothly.
11. Record the worm bearing preload measured on or near the center (1). The recorded bearing preload must be 1.2 N.m (10.5 lb in) with the worm and the ball nut installed. If the torque is outside of this range, readjust or repair the steering gear assembly as required.
12. To obtain the correct preload torque, adjust the over-center torque by turning the pitman shaft adjuster screw clockwise. NOTE: Refer to «FASTENER NOTICE»(/cadillac/escalade/gmt800-2001-2006/remont/oem-general-information/#gm-vehicles-cautions-notices__fastener-notice) in Cautions and Notices.
13. Add 0.9 N.m (8 lb in) torque to the previously measured worm bearing preload torque. Tighten Tighten the adjuster lock nut to 44 N.m (32 lb ft). Prevent the adjuster screw from turning while tightening the adjuster lock nut.

Scheme 92

Scheme 93

Scheme 94

1. Adjust the worm shaft and valve, Refer to «WORM THRUST BEARING PRELOAD ADJUSTMENT - OFF VEHICLE (700 GEAR)»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system__worm-thrust-bearing-preload-adjustment) .
2. Rotate the stub shaft (3) back and forth to drain the power steering fluid.
3. Loosen the adjuster lock nut (4).
4. Turn the pitman shaft adjuster screw (1) counterclockwise until the screw is fully extended.
5. Turn the pitman shaft adjuster screw (1) clockwise 1 full turn.
6. Rotate the stub shaft (3) from stop to stop using a 12-point socket while counting the number of turns.
7. Starting at either stop, turn the stub shaft (3) back half of the total number of turns. This is the center of the gear.
8. Make sure that the gear is centered by checking the following items: The flat on the stub shaft (3) faces upward. The flat on the stub shaft (3) is parallel with the side cover (2).
9. Align the master spline (5) on the pitman shaft (4) with the adjuster screw (1).
10. Place a torque wrench on the stub shaft (2) with the handle in the vertical position.
11. Rotate the stub shaft (2) 45 degrees from each side of the center of the stub shaft. The stub shaft (2) must rotate smoothly.
12. Record the worm bearing preload measured on or near the center (1). The recorded bearing preload must be 1.2 N.m (10.5 lb in) with the worm and the ball nut installed. If the torque is outside of this range, readjust or repair the steering gear assembly as required.
13. To obtain the correct preload torque, adjust the over-center torque by turning the pitman shaft adjuster screw clockwise. NOTE: Refer to «FASTENER NOTICE»(/cadillac/escalade/gmt800-2001-2006/remont/oem-general-information/#gm-vehicles-cautions-notices__fastener-notice) in Cautions and Notices.
14. Add 0.9 N.m (8 lb in) torque to the previously measured worm bearing preload torque. Tighten Tighten the adjuster lock nut to 44 N.m (32 lb ft). Prevent the adjuster screw from turning while tightening the adjuster lock nut.

Scheme 95

Scheme 96

Scheme 97

1. Remove the nut (3).
2. Remove the lock washer (2).
3. Clean the exposed end of the pitman shaft.
4. Clean the steering gear housing (1).
5. Use a wire brush to clean the pitman shaft splines. Important: The pitman shaft will not clear the housing if it is not centered.
6. To center the stub shaft: Rotate the stub shaft (1) with a wrench from stop to stop. Count the number of turns. Rotate the stub shaft back 1/2 of the total amount of turns. Important: When removing the pitman shaft assembly, the pitman arm and its components may fall from the steering gear housing. Support the pitman arm and its components while removing the pitman shaft assembly.
7. Remove the pitman shaft cover bolts (1) from the pitman shaft and cover assembly (3). Remove the lash adjuster nut (2) from the pitman shaft and cover assembly (3).
8. Remove the pitman shaft and cover assembly (3).
9. Remove the pitman shaft cover O-ring (4) from the steering gear housing assembly.

Scheme 98

Scheme 99

1. Install the new pitman shaft cover O-ring (4).
2. Install the pitman shaft and cover assembly (3) onto the steering gear housing assembly.
3. Install the lash adjuster nut (2) onto the pitman shaft and cover assembly (3) NOTE: Refer to «FASTENER NOTICE»(/cadillac/escalade/gmt800-2001-2006/remont/oem-general-information/#gm-vehicles-cautions-notices__fastener-notice) in Cautions and Notices.
4. Install the pitman shaft cover bolts (1) onto the pitman shaft and cover assembly (3). Tighten Tighten the pitman shaft cover bolts to 62 N.m (46 lb ft).
5. Install the lock washer (2).
6. Install the nut (3).
7. If necessary adjust the pitman shaft. Refer to «PITMAN SHAFT OVER-CENTER PRELOAD ADJUSTMENT - OFF VEHICLE (670 GEAR)»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) or «PITMAN SHAFT OVER-CENTER PRELOAD ADJUSTMENT - OFF VEHICLE (700 GEAR)»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) .

Scheme 100

Scheme 101

1. Remove the nut (3).
2. Remove the lock washer (2).
3. Clean the exposed end of the pitman shaft.
4. Clean the steering gear housing (1).
5. Use a wire brush to clean the pitman shaft splines.
6. Loosen the adjuster lock nut (1).
7. Remove the bolts (2).
8. Remove the nut.
9. Rotate the stub shaft (6) using a 12-point socket to center the steering gear (7). Important: When removing the pitman shaft assembly, the pitman arm and its components may fall from the steering gear housing. Support the pitman arm and its components while removing the pitman shaft assembly.
10. Remove the following items as an assembly: The side cover (8) The gasket (3) The pitman shaft (4)
11. Remove the pitman shaft (4) from the side cover (8).

Scheme 102

Scheme 103

1. Screw the pitman shaft (4) to the side cover (8) until it fully seats to the side cover (8).
2. Install the adjuster lock nut (1). Do not tighten the adjuster lock nut (1) until the pitman shaft adjustment is completed.
3. Install the pitman shaft assembly (4) and the side cover (8) to the steering gear housing (7). NOTE: Refer to «FASTENER NOTICE»(/cadillac/escalade/gmt800-2001-2006/remont/oem-general-information/#gm-vehicles-cautions-notices__fastener-notice) in Cautions and Notices.
4. Install the bolts (2). Tighten Tighten the bolts (2) to 60 N.m (45 lb ft).
5. Install the lock washer (2).
6. Install the nut (3).
7. If necessary, adjust the pitman shaft. Refer to «PITMAN SHAFT OVER-CENTER PRELOAD ADJUSTMENT - OFF VEHICLE (670 GEAR)»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) or «PITMAN SHAFT OVER-CENTER PRELOAD ADJUSTMENT - OFF VEHICLE (700 GEAR)»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) to adjust the pitman shaft.

Scheme 104

1. Rotate the stub shaft back and forth to drain the fluid.
2. Insert a punch into the housing access hole to unseat the retaining ring (1).
3. Remove the plug (2).
4. Remove the O-ring seal (3).

Scheme 105

1. Lubricate the O-ring seal (3) with power steering fluid.
2. Install the O-ring seal (3) into the steering gear housing (5).
3. Install the plug (2).
4. Install the retaining ring (1). Ensure that the retaining ring open end is approximately 25 mm (1 in) from the access hole in the steering gear housing (5).

Scheme 106

Scheme 107

1. Remove the thrust support assembly. Refer to «STEERING GEAR THRUST SUPPORT REPLACEMENT - OFF VEHICLE (700 GEAR)»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) .
2. Remove the stub shaft (1) and the valve assembly (2) from the steering gear housing.
3. If necessary, remove the stub shaft (1) from the valve assembly (2) in the following manner: Tap the stub shaft (1) lightly on a wood block in order to loosen the cap. Pull the cap and the valve spool out from valve body (2) 6 mm (1/4 in). Disengage the stub shaft pin (3) from the hole in the valve spool (4).
4. If the valve assembly needs repair, disassemble the valve in the following manner: Simultaneously pull and rotate the valve spool (1) from the valve body (3). Remove the valve spool O-ring seal (2). Alternately remove the valve body teflon rings (5) and the O-ring seals (4).

Scheme 108

Scheme 109

Scheme 110

Scheme 111

1. If disassembled, reassemble the valve assembly in the following manner: Alternately install the valve body teflon rings (5) and the O-ring seals (4). Install the valve spool O-ring seal (2) to the valve spool (1). Lubricate the valve spool (1) and O-ring seal (2) with power steering fluid.
2. Simultaneously push and rotate the valve spool (2) into the valve body (1) until the hole (3) in the valve spool (2) for the stub shaft pin is accessible from the opposite end of the valve body (1).
3. If necessary, install the stub shaft to the valve spool in the following manner: Lubricate the stub shaft assembly (3). Insert the stub shaft (3) into the valve spool. Insert the pin. Important: Make sure that the shaft cap notch (1) is mated with the valve body pin before installing the valve body into the steering gear assembly. The notch in the cap (1) must fully engage the valve body pin (2). Seat the cap against the valve body shoulder.
4. Install the stub shaft (7) and valve assembly (6) to the worm shaft (5). Ensure the pin fits in the worm shaft to the slot in the valve assembly.
5. Install the thrust support assembly. Refer to «STEERING GEAR THRUST SUPPORT REPLACEMENT - OFF VEHICLE (700 GEAR)»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) .

1. J 21552 Rack Piston Arbor
2. J 8947 Rack Piston Teflon Ring Compressor

Disassembly Procedure

Important: Do not remove the needle bearing when removing the pitman shaft arm and its components.

Scheme 112

Scheme 113

1. Remove the pitman shaft seals and bearing. Refer to «PITMAN SHAFT SEALS AND BEARING REPLACEMENT - OFF VEHICLE (670 GEAR)»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) or «PITMAN SHAFT SEALS AND BEARING REPLACEMENT - OFF VEHICLE (700 GEAR)»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) .
2. Remove the housing end plug. Refer to «STEERING GEAR HOUSING END PLUG REPLACEMENT - OFF VEHICLE»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) .
3. Turn the stub shaft counterclockwise until the rack piston (2) begins to come out of the steering gear housing (3).
4. Remove the rack piston plug (1).
5. Insert J 21552 into the bore of the rack piston (2).
6. Hold J 21552 tightly against the worm shaft while turning the stub shaft counterclockwise. Turning the stub shaft forces the rack piston (2) onto J 21552 . The rack piston balls remain in place.
7. Remove the following items as an assembly from the steering gear housing (9): The rack piston (4) The rack piston screws (8), clamp (7), ball guide (6) and balls (5) J 21552
8. Remove the spool valve assembly. Refer to «STEERING GEAR VALVE REPLACEMENT - OFF VEHICLE (700 GEAR)»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) .
9. Remove the worm shaft (14).
10. Remove the thrust bearing (12) and the flat races (11, 13). Important: When removing J 21552 , watch for falling piston balls (5) from inside the rack piston (4).
11. Remove J 21552 from the rack piston (4).
12. Remove the rack piston balls (5).
13. Remove the following items from the rack piston (4): The screws (8) The clamp (7) The ball guide (6) The remaining rack piston balls (5) in the ball guide (6)
14. Remove the teflon ring (2).
15. Remove the O-ring seal (3).
16. Clean all of the disassembled parts.
17. Inspect all of the disassembled parts for wear.
18. Replace the parts if necessary.

Scheme 114

Scheme 115

Scheme 116

Scheme 117

Scheme 118

Scheme 119

1. Install the O-ring seal (3) and the teflon ring (2).
2. Lubricate both parts with power steering fluid.
3. Install the worm shaft (14) to the rack piston (4) outside of the steering gear housing (9). Fully seat the worm shaft to the rack piston.
4. Align the worm shaft spiral groove with the rack piston ball return guide hole (1). Important: Improper rack piston ball installation may result in personal injury. The black rack piston balls are smaller than the silver rack piston balls. Install the black and the silver rack piston balls alternately into the rack piston and the ball guide to maintain the rack piston to the worm shaft preload.
5. Lubricate the rack piston balls with power steering fluid.
6. Insert the rack piston balls through the ball return guide hole (1) while turning worm shaft (2) counterclockwise in order to install the rack piston balls into the rack piston.
7. Install the remaining rack piston balls (3) into the ball guide (1) using grease at each end (2) to retain the rack piston balls (3).
8. Install the ball guide (3) to the rack piston (2).
9. Install the ball guide clamp (4). NOTE: Refer to «FASTENER NOTICE»(/cadillac/escalade/gmt800-2001-2006/remont/oem-general-information/#gm-vehicles-cautions-notices__fastener-notice) in Cautions and Notices.
10. Install the screws (5). Tighten Tighten the screws (5) to 6 N.m (53 lb in).
11. Insert J 21552 into the bore of the rack piston while turning the worm shaft counterclockwise. The turning of the worm shaft forces the rack piston onto J 21552 . The rack piston balls remain in place.
12. Install the flat races (2, 4) and the thrust bearing (3) onto the worm shaft (1).
13. Install the worm shaft (4) to the steering gear housing (3). Important: Do not adjust the worm shaft until all components are installed onto the steering gear housing.
14. Install the spool valve. Refer to «STEERING GEAR VALVE REPLACEMENT - OFF VEHICLE (700 GEAR)»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) .
15. Install the rack piston (2) to the worm (4) from J 21552 using J 8947 to compress the seals.
16. Hold J 21552 tightly against the worm shaft (4).
17. Turn the stub shaft clockwise until the rack piston (2) is seated on the worm shaft (4).
18. Remove J 21552 from the rack piston (1).
19. Install the rack piston plug (1). Tighten Tighten the rack piston plug to 150 N.m (111 lb ft).
20. Install the housing end plug. Refer to «STEERING GEAR HOUSING END PLUG REPLACEMENT - OFF VEHICLE»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) . Important: Do not adjust the pitman shaft until all components are installed onto the steering gear housing.
21. Install the pitman shaft seals and bearing. Refer to «PITMAN SHAFT SEALS AND BEARING REPLACEMENT - OFF VEHICLE (670 GEAR)»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) or «PITMAN SHAFT SEALS AND BEARING REPLACEMENT - OFF VEHICLE (700 GEAR)»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) .
22. To adjust the steering gear; refer to one of the following procedures: «WORM THRUST BEARING PRELOAD ADJUSTMENT - OFF VEHICLE (700 GEAR)»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system__worm-thrust-bearing-preload-adjustment) «PITMAN SHAFT OVER-CENTER PRELOAD ADJUSTMENT - OFF VEHICLE (670 GEAR)»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) or «PITMAN SHAFT OVER-CENTER PRELOAD ADJUSTMENT - OFF VEHICLE (700 GEAR)»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system)

1. J 6278 Pitman Shaft Bearing Remover and Installer
2. J 6219 Pitman Shaft Oil Seal Installer
3. J 4245 Internal Snap Ring Pliers

Scheme 120

Scheme 121

Scheme 122

Scheme 123

1. Remove the steering gear pitman shaft and housing cover. Refer to «STEERING GEAR PITMAN SHAFT AND HOUSING COVER REPLACEMENT - OFF VEHICLE (670 GEAR)»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) or «STEERING GEAR PITMAN SHAFT AND HOUSING COVER REPLACEMENT - OFF VEHICLE (700 GEAR)»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) .
2. Remove the pitman arm (4) from the steering gear.
3. Remove the pitman shaft boot (3) from the steering gear housing (1). Important: Do not score the housing bore when prying out seals and washers.
4. Remove the pitman shaft dust seal (2) from the steering gear housing (1).
5. Remove the pitman shaft retaining ring (2) from the steering gear housing (1) using J 4245 .
6. Remove the backup washer (3) from the steering gear housing (1).
7. Pry the pitman shaft seal (2) from the steering gear housing (1) using a screwdriver.
8. Inspect the housing for burrs and replace if necessary.
9. Insert J 6278 through the hole in the top of the steering gear housing (1).
10. Drive out the needle bearing (2) from the steering gear housing (1).

Scheme 124

Scheme 125

Scheme 126

Scheme 127

Scheme 128

1. Install the needle bearing into the steering gear housing (1) using J 6278 .
2. Drive the bearing into the housing until the needle bearing shoulder seats against the housing.
3. Coat the pitman shaft seal (2) and backup washer (3) with grease.
4. Install the pitman shaft seal (2) onto the steering gear housing (1) using J 6219 .
5. Install the backup washer (3) onto the steering gear housing (1). Important: The pitman shaft seal must not contact the bearing.
6. Install the pitman shaft retainer ring (2) onto the steering gearing housing (1) using J 4245 .
7. Coat the dust seal (2) with grease.
8. Install the dust seal (2) onto the steering gear housing (1).
9. Install the pitman shaft boot (3) onto the steering gear housing (1). Important: Do not install the lock washer and nut until all components have been installed onto the steering gear housing.
10. Install the pitman shaft and the side cover. Refer to «STEERING GEAR PITMAN SHAFT AND HOUSING COVER REPLACEMENT - OFF VEHICLE (670 GEAR)»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) or «STEERING GEAR PITMAN SHAFT AND HOUSING COVER REPLACEMENT - OFF VEHICLE (700 GEAR)»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) .
11. Install the pitman arm (4) to the steering gear.
12. Install the lock washer (2).
13. Install the nut (3).
14. To adjust the pitman shaft, Refer to «PITMAN SHAFT OVER-CENTER PRELOAD ADJUSTMENT - OFF VEHICLE (670 GEAR)»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) or «PITMAN SHAFT OVER-CENTER PRELOAD ADJUSTMENT - OFF VEHICLE (700 GEAR)»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) .

1. J 6278 Pitman Shaft Bearing Remover and Installer
2. J 4245 Internal Snap Ring Pliers

Scheme 129

Scheme 130

Scheme 131

Scheme 132

1. Remove the pitman shaft and the side cover. Refer to «STEERING GEAR PITMAN SHAFT AND HOUSING COVER REPLACEMENT - OFF VEHICLE (670 GEAR)»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) or «STEERING GEAR PITMAN SHAFT AND HOUSING COVER REPLACEMENT - OFF VEHICLE (700 GEAR)»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) .
2. Remove the pitman arm (3) from the steering gear (1).
3. Remove the pitman shaft boot (2).
4. Remove the dust seal (1).
5. Remove the retaining ring using the J 4245 . Important: Use care not to score the steering gear housing bore when prying out the seals and the washers.
6. Use a screwdriver to pry the backup washer (3) and the double lip seal (2) from the steering gear housing (1).
7. Inspect the steering gear housing (1) for burrs.
8. Insert J 6278 through the hole in the top of the steering gear housing (1).
9. Drive out the needle bearing (2).

Scheme 133

Scheme 134

Scheme 135

Scheme 136

1. Install the needle bearing (2) to the steering gear housing (1) using the J 6278 .
2. Coat the double lip seal (2) and the washer (3) with grease.
3. Install the double lip seal (2).
4. Install the backup washer (3).
5. Install the retaining ring using the J 4245 . Important: Do not install the lock washer and nut until complete installation of the pitman arm and its components have been installed. Do not adjust the pitman shaft until all components have been installed on the steering gear housing.
6. Install the pitman shaft and the side cover. Refer to «STEERING GEAR PITMAN SHAFT AND HOUSING COVER REPLACEMENT - OFF VEHICLE (670 GEAR)»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) or «STEERING GEAR PITMAN SHAFT AND HOUSING COVER REPLACEMENT - OFF VEHICLE (700 GEAR)»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) .
7. Install the dust seal (1).
8. Install the pitman shaft boot (2).
9. Install the pitman arm (3) to the steering gear (1).
10. Install the lock washer (4). NOTE: Refer to «FASTENER NOTICE»(/cadillac/escalade/gmt800-2001-2006/remont/oem-general-information/#gm-vehicles-cautions-notices__fastener-notice) in Cautions and Notices.
11. Install the nut (5). Tighten Tighten the pitman arm nut to 250 N.m (184 lb ft).
12. Refer to «PITMAN SHAFT OVER-CENTER PRELOAD ADJUSTMENT - OFF VEHICLE (670 GEAR)»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) or «PITMAN SHAFT OVER-CENTER PRELOAD ADJUSTMENT - OFF VEHICLE (700 GEAR)»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system) to adjust the pitman shaft.

Important: Do not to damage the threads of the steering gear housing when removing the check valve.

Remove the check valve (1) from the steering gear housing (2) using a small screwdriver.

Scheme 137

Install the check valve (1) using a 9.52mm inch diameter piece of tubing 100 mm (4 in) long to drive into the steering gear housing.

Scheme 138

Important: Replace the housing if the stub shaft housing, seal or bearing are damaged.

Scheme 139

1. Remove the stub shaft housing bolts (4) from the stub shaft housing (3).
2. Remove the stub shaft housing (3) from the steering gear.
3. Remove the stub shaft housing O-rings (1) (2) from the steering gear.

Scheme 140

1. Grease the stub shaft seal with the special grease supplied with the new stub shaft housing.
2. Install the new stub shaft housing O-rings (1) (2).
3. Install the stub shaft housing (3) onto the steering gear. NOTE: Refer to «FASTENER NOTICE»(/cadillac/escalade/gmt800-2001-2006/remont/oem-general-information/#gm-vehicles-cautions-notices__fastener-notice) in Cautions and Notices.
4. Install the stub shaft housing bolts (4) into the stub shaft housing (3). Tighten Tighten the stub shaft housing bolts to 63 N.m (46 lb ft).

1. J 42882 Adjuster Nut Socket
2. J 43435 Adjuster Lock Nut Wrench

Scheme 141

Scheme 142

Scheme 143

1. Rotate the stub shaft back and forth in order to drain the power steering fluid.
2. Remove the coupling shield retainer and the lock nut from the steering gear housing using J 43435 and a torque wrench.
3. Remove the adjuster nut assembly (2) from the steering gear housing (1) using J 42882 .
4. Remove the thrust support assembly (2) from the steering gear housing (1).
5. Remove the O-ring seal (3) from the thrust support assembly (2).

Important: Install a new O-ring seal each time the thrust support assembly is removed from the steering gear.

Scheme 144

Scheme 145

Scheme 146

1. Lubricate the new O-ring seal (3).
2. Install the new O-ring seal (3) on the thrust support assembly (2).
3. Install the thrust support assembly (2).
4. Connect the adjuster nut assembly (2) to the steering gear housing (1) using J 42882 .
5. Install the coupling shield retainer and the lock nut (1) to the adjuster nut assembly.
6. Refer to «WORM THRUST BEARING PRELOAD ADJUSTMENT - OFF VEHICLE (700 GEAR)»(/cadillac/escalade/gmt800-2001-2006/remont/manual-power-steering/#power-steering-system__worm-thrust-bearing-preload-adjustment) to adjust the thrust bearing preload.
7. Hold the adjuster nut assembly in position to maintain alignment of the marks. NOTE: Refer to «FASTENER NOTICE»(/cadillac/escalade/gmt800-2001-2006/remont/oem-general-information/#gm-vehicles-cautions-notices__fastener-notice) in Cautions and Notices.
8. Tighten the coupling shield retainer and the lock nut using J 43435 and a torque wrench. Tighten Tighten the retainer and the lock nut to 109 N.m (80 lb ft).

The hydraulic power steering pump is a constant displacement vane-type pump that provides hydraulic pressure and flow for the power steering gear. The hydraulic power steering pumps are either belt-driven or direct-drive, cam-driven.

The power steering fluid reservoir holds the power steering fluid and may be integral with the power steering pump or remotely located. The following locations are typical locations for the remote reservoir

1. Mounted to the front of the dash panel
2. Mounted to the inner fender
3. Mounted to a bracket on the engine

The 2 basic types of power steering gears are listed below

1. A recirculating ball system
2. A rack and pinion system

In the recirculating ball system, a worm gear converts steering wheel movement to movement of a sector shaft. A pitman arm attached to the bottom of the sector shaft actually moves one tie rod and an intermediate rod move the other tie rod.

In the rack and pinion system, the rack and the pinion are the 2 components that convert steering wheel rotation to lateral movement. The steering shaft is attached to the pinion in the steering gear. The pinion rotates with the steering wheel. Gear teeth on the pinion mesh with the gear teeth on the rack. The rotating pinion moves the rack from side to side. The lateral action of the rack pushes and pulls the tie rods in order to change the direction of the vehicle's front wheels.

The power steering pressure hose connects the power steering pump union fitting to the power steering gear and allows pressurized power steering fluid to flow from the pump to the gear.

The power steering return hose returns fluid from the power steering gear back to the power steering fluid reservoir. The power steering return line may contain an integral fin-type or line-type power steering fluid cooler.

In a typical power steering system, a pump generates hydraulic pressure, causing fluid to flow, via the pressure hose, to the steering gear valve assembly. The steering gear valve assembly regulates the incoming fluid to the right and left chambers in order to assist in right and left turns.

Turning the steering wheel activates the valve assembly, which applies greater fluid pressure and flow to 1 side of the steering gear piston, and lower pressure and flow to the other side of the piston. The pressure assists the movement of the gear piston. Tie rods transfer this force to the front wheels, which turn the vehicle right or left.

Scheme 147

Scheme 148

Scheme 149

Scheme 150

See also:
• LIFTING AND JACKING THE VEHICLE
• 8.1L
• FASTENER NOTICE
• POWER STEERING HOSE DISCONNECTED NOTICE
• INSTALLING HOSES WITHOUT TWISTS OR BENDS NOTICE
• SYMPTOMS - POWER STEERING SYSTEM
• WORM THRUST BEARING PRELOAD ADJUSTMENT - OFF VEHICLE (700 GEAR)