Battery Cadillac Escalade GMT800

Fastener Tightening Specifications

Fastener Tightening Specifications

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Diagnostic Aids

Important

1. The battery test using the J 42000 Battery Tester requires correct connections to the battery terminals. A failure to obtain the correct connections during the test may result in a failed test on a good battery.
2. Use the Out of Vehicle test for each battery when testing a vehicle with dual batteries.

Follow these instructions in order to avoid an incorrect diagnosis because of connections

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1. If testing the vehicle with the battery cables still connected, wiggle the J 42000 clips on the terminal bolt. This may cut through any coating or through any oxidation that may be present on the bolt. Even new bolts contain a protective coating that may insulate or cause a resistance in the test circuit.
2. If correct connections to the battery terminal bolts in the vehicle are in doubt, perform the following steps: Disconnect the negative battery cable. Disconnect the positive battery cable. Install the test adapters on the terminals. Follow the instructions for testing a removed battery.
3. If the tester displays a REPLACE BATTERY or BAD CELL-REPLACE result for a battery tested in the vehicle with the battery cables connected, perform the following steps: Disconnect the negative battery cable. Disconnect the positive battery cable. Install the tester adapters. Important: Always write the test code displayed by the tester on the repair order for any warranty purposes. The number is a unique code that describes the test data for a particular battery at a particular time. The test code may occasionally repeat when you retest the same battery. More often, each test will result in a different code. Use the test code from the second, or Out of Vehicle test. Follow the instructions for testing a removed battery. Replace the battery only if the second test shows a REPLACE BATTERY or BAD CELL-REPLACE result. Use the test code from the second test for any warranty purposes.
4. Use the correct terminal adapters. Do not use any common bolts or a combination of bolts, of nuts, and of washers as adapters when testing the battery. Use the test adapters that are provided with the J 42000 or GM P/N 12303040 terminal adapters. If the adapters that are provided with the J 42000 require replacement, use GM P/N 12303040. Any other adapter may not contact the correct areas of the battery terminal, causing a resistance that may result in an invalid battery test result.

Tools Required

J 42000 Battery Tester

1. For best results, use an automatic taper-rate battery charger with a voltage capability of 16 volts.
2. The charging area should be well ventilated.
3. Do not charge a battery that appears to be frozen; allow the battery to warm to room temperature and test it using the J 42000 before charging.

Charging Time Required

The time required to charge a battery will vary depending upon the following factors

1. The battery charger capacity; The higher the charger's amperage, the less time it will take to charge the battery.
2. The state-of-charge of the battery; A completely discharged battery requires more than twice as much charging time as a half charged battery. In a discharged battery with a voltage below 11 volts, the battery has a very high internal resistance and may only accept a very low current at first. Later, as the charging current causes the acid content to increase in the electrolyte, the charging current will increase. Extremely discharged batteries may not activate the reversed voltage protection in some chargers. Refer to the manufacturers instructions for operating this circuitry.
3. The temperature of the battery; The colder the battery is, the more time it takes to recharge the battery. The charging current accepted by a cold battery is very low at first. As the battery warms, the charging current will increase.

Charging Procedure

Note. Turn OFF the ignition when connecting or disconnecting the battery cables, the battery charger or the jumper cables. Failure to do so may damage the PCM or other electronic components.

Note. Refer to FASTENER NOTICE in Cautions and Notices.

When charging side-terminal batteries with the battery cables connected, connect the charger to the positive cable bolt and to a ground located away from the battery. When charging side-terminal batteries with the battery cables disconnected, install the battery side terminal adapters and connect the charger to the adapters.

Tighten

Tighten the battery side terminal adapters to 15 N.m (11 lb ft).

Use the following procedure to charge the battery

1. Turn OFF the charger.
2. Ensure that all of the battery terminal connections are clean and tight.
3. Connect the charger positive lead to the battery positive terminal on the Battery or Fuse Block - Underhood. NOTE: Do not connect the negative charger lead to the housings of other vehicle electrical accessories or equipment. The action of the battery charger may damage such equipment.
4. Connect the negative charger lead to a solid engine ground or to a ground stud in the engine compartment that is connected directly to the battery negative terminal, but away from the battery. If the negative battery cable is disconnected and a terminal adapter is being used, connect directly to the adapter.
5. Turn ON the charger and set to the highest setting for normal charging.
6. Inspect the battery every half hour after starting the battery charger. Charge the battery until the taper-rate charger indicates that the battery is fully charged. Estimate the battery temperature by feeling the side of the battery. If it feels hot to the touch or its temperature is over 45°C (125°F), discontinue charging and allow the battery to cool before resuming charging.
7. After charging, test the battery. Refer to «BATTERY INSPECTION/TEST»(/cadillac/escalade/gmt800-2001-2006/remont/body-electrical/#battery) .

Tools Required

1. J 38758 Parasitic Draw Test Switch
2. J 39200 Digital Multimeter

If the vehicle exhibits a low or dead battery after an overnight period, or discharges over a period of 2 or 3 days, the electrical system should be checked for an excessive electrical drain. This is referred to as Parasitic Current Drain.

If a battery needs recharging and no cause is evident, check the vehicle for excessive parasitic current drain.

One or more on-board solid state control modules, such as the body control module (BCM) may at some time exhibit a failure mode that causes a high parasitic drain on the vehicle's battery. When the battery is disconnected to install an ammeter, etc., the excessive current drain may not occur once the circuit continuity is restored. Even though cycling the ignition key to the RUN and then to the OFF position may cause such a drain to recur, there may be drains that will not recur unless the vehicle systems are reactivated in a road test. Since the ignition switch must not be rotated to the ACCESSORY, RUN or START position with an ammeter installed between the battery terminal and the battery cable, a current drain test tool must be used as described in the following procedures.

Before starting this procedure, ensure that the ignition switch is in the LOCK position, all electrical accessories are turned OFF, the underhood lamp is disconnected, the door glass is open and the doors are closed.

Note. Do not turn the parasitic draw test switch to the OFF position with the engine running. Damage will occur to the vehicle's electrical system.

Note. The test switch must be in the ON position when removing the fuses in order to maintain continuity in the electrical system. This avoids damaging the digital multimeter due to accidental overloading, such as a door being opened to change a fuse.

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1. Disconnect the battery negative cable. Refer to «BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE»(/cadillac/escalade/gmt800-2001-2006/remont/body-electrical/#battery) .
2. Install the male end of the J 38758 Parasitic Draw Test Switch to the battery negative terminal.
3. Turn OFF the test switch.
4. Install the battery negative cable to the female end of the test switch.
5. Turn ON the test switch.
6. Road test the vehicle while activating all accessories, including the radio and the air conditioning.
7. Turn OFF the ignition switch. Remove the key. Important: From this point on, electrical continuity must be maintained in the ground circuit of the battery through the J 38758 in the ON position or through the J 39200 . The BCM can draw several amps of current after the ignition is turned off. Refer to BODY CONTROL SYSTEM DESCRIPTION AND OPERATION in Body Control System.
8. Install the scan tool and perform the power down now feature from the BCM output menu. After performing this function the scan tool can be powered off or disconnected, then wait an additional 5 minutes before continue testing.
9. Set the J 39200 Digital Multimeter to the 10 A scale. Important: If an ammeter other than the J 39200 is used, ensure that the vehicle does not have a high current drain that would damage the ammeter when connected to the circuit. This can be done using the following procedure: 9.1. Connect a jumper wire with an in-line 10 A fuse J 36169-A to the terminals of the test switch. 9.2. Turn the test switch to the OFF position. 9.3. Wait 10 seconds. 9.4. If the fuse does not blow, the current is less than 10 A and the ammeter can be used safely. 9.5. Turn the test switch to the ON position before the fused jumper wire is removed and the multimeter is installed.
10. Connect the ammeter to the test switch terminals.
11. Turn OFF the test switch. This allows the current to flow through the ammeter.
12. Wait at least 60 seconds, then check the current reading. When there is a current reading of 2 A or less, turn ON the test switch, this maintains continuity in the electrical system. Then, switch the meter down to the 2 A scale, for a more accurate reading, when the test switch is reopened.
13. Take the reading in milli-amps.
14. Note the battery reserve capacity. Refer to Battery Usage, See «Battery Usage Specifications»(/cadillac/escalade/gmt800-2001-2006/remont/body-electrical/#battery) . Divide this number by 4. Compare this to the multimeter reading. The current drain should not exceed this number. Example: If a battery has a reserve capacity of 100 minutes, the current drain should not exceed 25 milli-amps. If the vehicle has 2 batteries, add the reserve capacities together and divide this total by 4. NOTE: Always turn the test switch knob to the ON position before removing each fuse to maintain continuity in the electrical system and to avoid damaging the meter due to accidental overloading, such as opening a door to change a fuse.
15. When the current draw is too high, remove the electrical system fuses one at a time until the draw returns to a value less than or equal to specifications.
16. Repeat the parasitic current drain test procedure after any repair has been completed.
17. When the cause of the excessive current draw has been located and repaired, remove the meter and the parasitic draw test switch and terminal adapters.
18. Connect the negative cable to the battery negative terminal. Refer to «BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE»(/cadillac/escalade/gmt800-2001-2006/remont/body-electrical/#battery) .

A battery is not designed to last forever. With proper care, however, the battery will provide years of good service. If the battery tests good but still fails to perform well, the following are some of the more common causes

1. A vehicle accessory was left on overnight.
2. The driving speeds have been slow with frequent stops with many electrical accessories in use, particularly air conditioning, headlights, wipers, heated rear window, cellular telephone, etc.
3. The electrical load has exceeded the generator output, particularly with the addition of aftermarket equipment.
4. Existing conditions in the charging system, including the following possibilities: A slipping belt A bad generator
5. The battery has not been properly maintained, including a loose battery hold down or missing battery insulator if used.
6. There are mechanical conditions in the electrical system, such as a short or a pinched wire, attributing to power failure. Refer to GENERAL ELECTRICAL DIAGNOSIS PROCEDURES in Wiring Systems.

Electrolyte Freezing

The freezing point of electrolyte depends on its specific gravity. A fully charged battery will not freeze until the ambient temperature gets below -54°C (-65°F). However, a battery with a low state of charge may freeze at temperatures as high as -7°C (+20°F). Since freezing may ruin a battery, the battery should be protected against freezing by keeping it properly charged. As long as the green eye is visible in the hydrometer, the freezing point of the battery will be somewhere below -32°C (-25°F).

Certain devices on the vehicle maintain a small continuous current drain on the battery. A battery that is not used for an extended period of time will discharge. Eventually permanent damage will result. Discharged batteries will also freeze in cold weather. Refer to BATTERY INSPECTION/TEST .

In order to maintain a battery state of charge while storing the vehicle for more than 30 days

Important: If a green dot is not visible in the hydrometer, charge the battery. Refer to BATTERY CHARGING .

1. Ensure that the green dot is visible in the built-in hydrometer. CAUTION: Refer to «BATTERY DISCONNECT CAUTION»(/cadillac/escalade/gmt800-2001-2006/remont/oem-general-information/#gm-vehicles-cautions-notices__battery-disconnect-caution) in Cautions and Notices.
2. Disconnect the battery ground to protect the battery from discharge by parasitic current drains.

When the battery cannot be disconnected

1. Maintain a high state of charge.
2. Establish a regular schedule for recharging the battery every 20-45 days.

A battery that has remained in a discharged state for a long period of time is difficult to recharge or may be permanently damaged.

Jump Starting in Case of Emergency

Note. This vehicle has a 12 volt, negative ground electrical system. Make sure the vehicle or equipment being used to jump start the engine is also 12 volt, negative ground. Use of any other type of system will damage the vehicle's electrical components.

This vehicle has a 12 volt positive, negative ground electrical system. Do not try to jump start a vehicle if you are unsure of the other vehicle's positive voltage or ground position. The booster battery and the discharged battery should be treated carefully when using jumper cables.

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1. Position the vehicle with the booster battery so that the jumper cables will comfortably reach the battery of the other vehicle. Do not let the 2 vehicles touch. Make sure that the jumper cables do not have loose clamps or missing insulation.
2. Perform the following steps on both vehicles: 2.1. Place the automatic transmission in PARK. 2.2. Block the wheels. 2.3. Set the parking brake. 2.4. Turn off all electrical loads that are not needed. Leave the hazard flashers ON. 2.5. Turn OFF the ignition switch. Important: Some vehicles have a battery remote positive stud. ALWAYS use the battery remote positive stud in order to give or to receive a jump start.
3. Attach the end of one jumper cable to the positive terminal of the discharged battery.
4. Attach the other end of the first cable to the positive terminal of the booster battery.
5. Attach one end of the remaining jumper cable to the negative terminal of the booster battery. NOTE: Do not connect the negative charger lead to the housings of other vehicle electrical accessories or equipment. The action of the battery charger may damage such equipment.
6. Make the final connection of the negative jumper cable to the block or suitable bracket connected directly to the block, away from the battery.
7. Start the engine of the vehicle that is providing the jump start and turn off all electrical accessories. Raise the engine RPM to approximately 1,500 RPM.
8. Crank the engine of the vehicle with the weak battery. If the engine does not crank or cranks too slowly, perform the following steps: 8.1. Turn the ignition OFF. 8.2. Allow the booster vehicle engine to run at approximately 1,500 RPM for 5 minutes. 8.3. Attempt to start the engine of the vehicle with the discharged battery.
9. Reverse the steps exactly when removing the jumper cables. The negative battery cable must first be disconnected from the engine that was jump started.

Removal Procedure

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1. Turn off all the lamps and accessories.
2. Turn the ignition OFF.
3. Loosen the negative cable bolt.
4. Remove the battery cable from the battery.

Installation Procedure

Important: Clean any existing corrosion from the battery terminal bolt flange and the battery cable end.

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1. Install the battery cable to the battery. 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. Tighten the negative cable bolt. Tighten Tighten the bolt to 17 N.m (13 lb ft).

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1. Disconnect the negative battery cable. Refer to «BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE»(/cadillac/escalade/gmt800-2001-2006/remont/body-electrical/#battery) .
2. If equipped with a 4.8L, 5.3L, or 6.0L engine, remove the battery cable bracket bolt and bracket from the power steering pump.
3. If equipped, disconnect the accessory power fuse block front wiring harness electrical connector from the negative cable connector.
4. If equipped with a 4.8L, 5.3L, or 6.0L engine, remove the negative cable clip from the positive cable clip.
5. Raise and suitably support 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.
6. Remove the engine wiring harness ground/negative cable bolt.
7. If equipped with a 8.1L engine, remove the negative cable clip from the positive cable clip.
8. Raise and suitably support 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.
9. Remove the engine wiring harness ground/negative cable bolt.
10. Reposition the wiring harness ground and negative cables.
11. Remove the forward lamp wiring harness ground/negative cable bolt.
12. Remove the negative battery cable.

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1. Install the negative battery cable.
2. Position the negative cable and forward lamp wiring harness ring terminals to the frame. Insert the anti-rotation tab on the forward lamp wiring harness into the hole in the frame. 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 forward lamp wiring harness ground/negative cable bolt. Tighten Tighten the bolt to 9 N.m (80 lb in). Important: The engine wiring harness ground is to be installed under the negative cable ground.
4. If equipped with a 8.1L engine, position the wiring harness ground and negative cables. Position the anti-rotation tab on the negative cable in the correct location.
5. Install the engine wiring harness ground/negative cable bolt. Tighten Tighten the bolt to 25 N.m (18 lb ft).
6. Lower the vehicle.
7. Install the negative cable clip to the positive cable clip.
8. If equipped with a 4.8L, 5.3L, or 6.0L engine, position the negative cable and engine wiring harness ring terminals to the engine block. Position the anti-rotation tab on the negative cable in the correct location.
9. Install the engine wiring harness ground/negative cable bolt. Tighten Tighten the bolt to 25 N.m (18 lb ft).
10. Lower the vehicle.
11. Install the negative cable clip to the positive cable clip.
12. If equipped, connect the accessory power fuse block front wiring harness electrical connector to the negative cable connector.
13. Install the battery cable bracket and bolt to the power steering pump. Tighten Tighten the bolt to 25 N.m (18 lb ft).
14. Connect the negative battery cable. Refer to «BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE»(/cadillac/escalade/gmt800-2001-2006/remont/body-electrical/#battery) .

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1. Disconnect the negative battery cable. Refer to «BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE»(/cadillac/escalade/gmt800-2001-2006/remont/body-electrical/#battery) .
2. Unsnap the positive battery cable cap.
3. Disconnect the positive battery cable. Important: The bolt is integral to the battery cable and is not removable.
4. Loosen the positive battery cable bolt at the underhood bussed electrical center (UBEC).
5. If necessary, remove the engine sight shield. Refer to «ENGINE SIGHT SHIELD REPLACEMENT (4.8L, 5.3L, AND 6.0L (RPO LQ4)»(ref-180687-S32663973432005072800000) or «ENGINE SIGHT SHIELD REPLACEMENT (6.0L (RPO LQ9)»(ref-180687-S12210361512005072800000) in Engine Mechanical - 8.1 L.
6. Unsnap the junction block cover.
7. Remove the positive battery cable (1) from the junction block.
8. If equipped with a 4.8L, 5.3L, or 6.0L engine, remove the negative cable clip from the positive cable clip.
9. Raise and suitably support 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.
10. If equipped with a 8.1 L engine, remove the negative cable clip from the positive cable clip.
11. Raise and suitably support 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.
12. Remove the positive battery cable channel bolt.
13. Slide the channel pin out of the oil pan tab.
14. Remove the positive battery cable from the channel.
15. If equipped with a 4.8L, 5.3L, or 6.0L engine, remove the battery cable bracket bolt and bracket from the power steering pump.
16. If equipped with a 4.8L, 5.3L, or 6.0L engine, remove the positive cable nut (1).
17. Remove the positive cable from the starter.
18. Remove the positive cable clip from the clip on the oil pan.
19. Remove the positive cable from the clip on the oil pan.
20. Remove the positive battery cable.
21. If equipped with a 8.1 L engine, remove the positive cable nut (2).
22. Remove the positive cable (1) from the starter.
23. Remove the positive cable clip bolt (3).
24. Remove the positive cable from the engine harness clip.
25. Remove the positive battery cable.

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1. If equipped with a 8.1 L engine, install the positive battery cable.
2. Install the positive cable to the engine harness clip. 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 positive cable clip bolt (3). Tighten Tighten the bolt to 8 N.m (71 lb in).
4. Install the positive cable (1) to the starter.
5. Install the positive cable nut (2). Tighten Tighten the nut to 9 N.m (80 lb in).
6. If equipped with a 4.8L, 5.3L, or 6.0L engine, install the positive battery cable.
7. Install the positive cable to the clip on the oil pan.
8. Install the positive cable clip to the clip on the oil pan.
9. Install the positive cable to the starter.
10. Install the positive cable nut (1). Tighten Tighten the nut to 9 N.m (80 lb in).
11. If equipped with a 4.8L, 5.3L, or 6.0L engine, install the battery cable bracket and bolt to the power steering pump. Tighten Tighten the bolt to 25 N.m (18 lb ft).
12. Install the positive battery cable to the channel.
13. Slide the channel pin into the oil pan tab.
14. Install the positive battery cable channel bolt. Tighten Tighten the bolt to 12 N.m (106 lb in).
15. Lower the vehicle.
16. If equipped with a 8.1 L engine, install the negative cable clip to the positive cable clip.
17. If equipped with a 4.8L, 5.3L, or 6.0L engine, install the negative cable clip to the positive cable clip.
18. Install the positive battery cable (1) into the junction block.
19. Snap the junction block cover closed.
20. If necessary, install the engine sight shield. Refer to «ENGINE SIGHT SHIELD REPLACEMENT (4.8L, 5.3L, AND 6.0L (RPO LQ4)»(ref-180687-S32663973432005072800000) or «ENGINE SIGHT SHIELD REPLACEMENT (6.0L (RPO LQ9)»(ref-180687-S12210361512005072800000) in Engine Mechanical - 8.1 L.
21. Tighten the positive cable bolt at the UBEC. Tighten Tighten the bolt to 9 N.m (80 lb in).
22. Connect the positive battery cable. Tighten Tighten the bolt to 17 N.m (13 lb ft).
23. Snap the positive battery cable cap closed.
24. Connect the negative battery cable. Refer to «BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE»(/cadillac/escalade/gmt800-2001-2006/remont/body-electrical/#battery) .

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1. Disconnect the negative battery cable. Refer to «BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE»(/cadillac/escalade/gmt800-2001-2006/remont/body-electrical/#battery) .
2. Unsnap the positive battery cable cap.
3. Disconnect the positive battery cable.
4. Remove the front end diagonal brace bolts and brace.
5. Remove the battery hold down retainer bolt and retainer.
6. Remove the battery.
7. Remove the battery insulator, if necessary.

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1. Install the battery insulator, if necessary.
2. Install the battery. 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 battery hold down retainer and bolt. Tighten Tighten the bolt to 25 N.m (18 lb ft).
4. Install the front end diagonal brace and bolts. Tighten Tighten the bolts to 9 N.m (80 lb in).
5. Connect the positive battery cable. Tighten Tighten the bolt to 17 N.m (13 lb ft).
6. Snap the positive battery cable cap closed.
7. Connect the negative battery cable. Refer to «BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE»(/cadillac/escalade/gmt800-2001-2006/remont/body-electrical/#battery) .

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1. Remove the battery. Refer to «BATTERY REPLACEMENT»(/cadillac/escalade/gmt800-2001-2006/remont/body-electrical/#battery) .
2. Remove the bolts from the battery tray support.
3. Remove the bolts (1) from the fender inner panel.
4. Remove the bolts (2) from the battery tray reinforcement.
5. Remove the battery tray.

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1. Install the battery tray.
2. Install the bolts (2) to the battery tray reinforcement until snug.
3. Install the bolts (1) to the fender inner panel until snug.
4. Install the bolts to the battery tray support until snug. NOTE: Refer to «FASTENER NOTICE»(/cadillac/escalade/gmt800-2001-2006/remont/oem-general-information/#gm-vehicles-cautions-notices__fastener-notice) in Cautions and Notices
5. Tighten the battery tray bolts. Tighten Tighten the bolts to 9 N.m (80 lb in).
6. Install the battery. Refer to «BATTERY REPLACEMENT»(/cadillac/escalade/gmt800-2001-2006/remont/body-electrical/#battery) .

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1. If necessary, remove the engine sight shield. Refer to «ENGINE SIGHT SHIELD REPLACEMENT (4.8L, 5.3L, AND 6.0L (RPO LQ4)»(ref-180687-S32663973432005072800000) or «ENGINE SIGHT SHIELD REPLACEMENT (6.0L (RPO LQ9)»(ref-180687-S12210361512005072800000) in Engine Mechanical - 8.1L.
2. Remove the engine wiring harness ground bolt.
3. Reposition the engine wiring harness ground and ground strap.
4. Remove the ground strap nut from the stud at the front of dash.
5. Remove the ground strap from the stud.

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1. Install the ground strap to the stud. 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 ground strap nut to the stud at the front of dash. Tighten Tighten the nut to 9 N.m (80 lb in).
3. Position the ground strap and engine wiring harness ground.
4. Install the engine wiring harness ground bolt. Tighten Tighten the bolt to 16 N.m (12 lb ft).
5. If necessary, install the engine sight shield. Refer to «ENGINE SIGHT SHIELD REPLACEMENT (4.8L, 5.3L, AND 6.0L (RPO LQ4)»(ref-180687-S32663973432005072800000) or «ENGINE SIGHT SHIELD REPLACEMENT (6.0L (RPO LQ9)»(ref-180687-S12210361512005072800000) in Engine Mechanical - 8.1 L.

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The maintenance free battery is standard. There are no vent plugs in the cover. The battery is completely sealed except for 2 small vent holes in the side. These vent holes allow the small amount of gas that is produced in the battery to escape.

The battery has 3 functions as a major source of energy

1. Engine cranking
2. Voltage stabilizer
3. Alternate source of energy with generator overload

The battery specification label, example below, contains information about the following

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1. The test ratings
2. The original equipment catalog number
3. The recommended replacement model number

A battery has 2 ratings

1. Reserve capacity
2. Cold cranking amperage

When a battery is replaced use a battery with similar ratings. Refer to the battery specification label on the original battery or Refer to Battery Usage, See Battery Usage Specifications .

Reserve Capacity

Reserve capacity is the amount of time in minutes it takes a fully charged battery, being discharged at a constant rate of 25 amperes and a constant temperature of 27°C (80°F) to reach a terminal voltage of 10.5 volts. Refer to Battery Usage, See Battery Usage Specifications for the reserve capacity rating of the original equipment battery.

Cold Cranking Amperage

The cold cranking amperage is an indication of the ability of the battery to crank the engine at cold temperatures. The cold cranking amperage rating is the minimum amperage the battery must maintain for 30 seconds at -18°C (0°F) while maintaining at least 7.2 volts. Refer to Battery Usage, See Battery Usage Specifications for the cold cranking amperage rating for this vehicle.

Generator

The AD-230 and AD-244 generators are non-repairable. They are electrically similar to earlier models. The generators feature the following major components

1. The delta stator
2. The rectifier bridge
3. The rotor with slip rings and brushes
4. A conventional pulley
5. Dual internal fans
6. A voltage regulator

The pulley and the fan cool the slip ring and the frame.

The AD stands for Air-cooled Dual internal fan; the 2 is an electrical design designator; the 30/44 denotes the outside diameter of the stator laminations in millimeters, over 100 millimeters. The generators is rated at 102 and 130 amperes respectively.

The generator features permanently lubricated bearings. Service should only include the tightening of mounting components. Otherwise, the generator is replaced as a complete unit.

Regulator

The voltage regulator controls the field current of the rotor in order to limit system voltage. The regulator switches the current on and off at a rate of 400 cycles per second in order to perform the following functions

1. Radio noise control
2. Obtain the correct average current needed for proper system voltage control

At high speeds, the on-time may be 10 percent with the off-time at 90 percent. At low speeds, the on-time may be 90 percent and the off-time 10 percent.

Charging System Indicator

The IPC illuminates the charge indicator in the message center when the following occurs

1. The PCM detects that the generator output is less than 11 volts or greater than 16 volts. The IPC receives a class 2 message from the PCM requesting illumination.
2. The IPC determines that the system voltage is less than 11 volts or greater than 16 volts. The IPC receives a class 2 message from the body control module (BCM) indicating the system voltage.
3. The IPC performs the displays test at the start of each ignition cycle. The indicator illuminates for approximately 3 seconds.
4. The ignition is on, with the engine off.

Scheme 79

Scheme 80

See also:
• BATTERY DISCONNECT CAUTION
• FASTENER NOTICE
• LIFTING AND JACKING THE VEHICLE
• BATTERY INSPECTION/TEST