Electronic Suspension System - Automatic Level Control: Removal & Installation Oldsmobile Bravada III

Removal Procedure

Note. Depressurize the air suspension system only after the rear axle is supported and is set between D- Height and Full Jounce.

1. Remove the air suspension system fuse.
2. Raise and support the vehicle. Refer to «LIFTING AND JACKING THE VEHICLE»(ref-189249) in General Information.
3. Raise and support the rear axle at the designed D-height. Refer to «TRIM HEIGHT SPECIFICATIONS»(ref-169289-S29808357902004120600000) in Suspension General Diagnosis.
4. Remove the air compressor mounting bolts from the frame and support air compressor.
5. Loosen both of the air supply line connections at the air compressor in order to depressurize the air springs.

Installation Procedure

Note. Refer to FASTENER NOTICE in Cautions and Notices.

1. Tighten the air supply lines to the air compressor. Do not over tighten. Tighten: Tighten the air supply lines to the air compressor to 2.25 N.m (20 lb in).
2. Install the air compressor to frame mounting bolts. Tighten: Tighten the air compressor mounting bolts to the frame to 20 N.m (15 lb ft).
3. Lower the vehicle.
4. Install the air suspension system fuse.
5. Start the vehicle and run for approximately 1 minute to ensure that the air suspension system is functioning properly.
6. Check the D height. Refer to «TRIM HEIGHT INSPECTION PROCEDURE»(ref-169289-S28377472532004120600000) in Suspension General Diagnosis.

Scheme 10

Scheme 11

1. Remove the air suspension system fuse.
2. Ensure that the vehicle is parked on level surface.
3. Inspect tires for proper tire pressure.
4. Inspect the air suspension system components for damage or defects.
5. Raise and support the vehicle. Refer to «LIFTING AND JACKING THE VEHICLE»(ref-189249) in General Information.
6. Remove the rear tire and wheels. Refer to «TIRE AND WHEEL REMOVAL AND INSTALLATION»(ref-189902-S21771962502005091200000) in Tires and Wheels.
7. Support the rear axle and set the rear axle to proper D height. Refer to «TRIM HEIGHT SPECIFICATIONS»(ref-169289-S29808357902004120600000) in Suspension General Diagnosis.
8. Disconnect the air spring level sensor link from the upper control arm.
9. Disconnect the air spring level sensor electrical connector.
10. Remove the air spring level sensor to the frame mounting bolts.
11. Remove the air spring level sensor.

1. Install the air spring level sensor link to the upper control arm. NOTE: Refer to «FASTENER NOTICE»(ref-175132-S17785009232005041500000) in Cautions and Notices. IMPORTANT: Do not remove the air spring level sensor locating pin until the air spring level sensor has been properly aligned and the proper D height has been measured and maintained. Refer to «TRIM HEIGHT SPECIFICATIONS»(ref-169289-S29808357902004120600000) in Suspension General Diagnosis.
2. Install the air spring level sensor to the frame mounting bolts. Tighten: Tighten the air spring level sensor to the frame mounting bolts to 8 N.m (71 lb in).
3. Connect the air spring level sensor electrical connector. NOTE: Failure to remove the air suspension auto level control sensor locating pin before the rear axle support is removed will cause damage to the air suspension auto level control sensor.
4. Remove the air spring level sensor locating pin.
5. Remove the rear axle support.
6. Install the rear tire and wheels. Refer to «TIRE AND WHEEL REMOVAL AND INSTALLATION»(ref-189902-S21771962502005091200000) in Tires and Wheels.
7. Lower the vehicle.
8. Install the air suspension system fuse.
9. Start the vehicle and run for approximately 1 minute to ensure that the air spring leveling system is functioning properly.
10. Check the D height. Refer to «TRIM HEIGHT INSPECTION PROCEDURE»(ref-169289-S28377472532004120600000) in Suspension General Diagnosis.

Air Spring Compressor Replacement

Scheme 12

Scheme 13

1. Remove the air suspension system fuse.
2. Raise and support the vehicle. Refer to «LIFTING AND JACKING THE VEHICLE»(ref-189249) in General Information.
3. Remove the air spring compressor to the frame mounting bolts.
4. Disconnect the air inflator switch electrical connection, air supply lines, and air spring compressor vent hose from the air spring compressor.
5. Disconnect the air spring compressor electrical connection (2). IMPORTANT: Ensure the color on air supply lines match the color on the air spring compressor for reassembly.
6. Disconnect the air supply lines (3) from the air spring compressor (1).
7. Remove the air spring compressor from the vehicle.

Note. Refer to FASTENER NOTICE in Cautions and Notices.

1. If no damage to the air supply pipes is evident, then remove the fittings from the new compressor and use existing fittings that are already attached to air supply lines. Install the air supply lines with existing fittings to the air spring compressor. Tighten: Tighten the air supply line fittings to 2.25 N.m (20 lb in).
2. If damage is evident to the air supply lines, then replace the air supply lines. Refer to «Air Suspension Air Line Replacement»(ref-192074-S22914988562005091900000) .
3. Connect the air spring compressor electrical connection (2).
4. Connect the air inflator switch electrical connection, air supply line, and air spring compressor vent hose to the air spring compressor.
5. Install the air spring compressor to the frame mounting bolts. Tighten: Tighten the air spring compressor to the frame mounting bolts to 20 N.m (15 lb ft).
6. Lower the vehicle.
7. Install the air suspension system fuse.
8. Start the vehicle and run for approximately 1 minute to ensure that the air spring leveling system is functioning properly.
9. Inspect D height. Refer to «TRIM HEIGHT INSPECTION PROCEDURE»(ref-169289-S28377472532004120600000) in Suspension General Diagnosis.
10. Inspect for leaks. If a leak is found at the air supply lines connections at the air spring compressor, replace the air supply lines. Refer to «Air Suspension Air Line Replacement»(ref-192074-S22914988562005091900000) .

1. Raise and support the vehicle. Refer to «LIFTING AND JACKING THE VEHICLE»(ref-189249) in General Information.
2. Disconnect the inflator air switch harness from the air compressor.
3. Lower the vehicle.
4. Remove the rear quarter lower trim panel. Refer to «TRIM PANEL REPLACEMENT - REAR QUARTER - LEFT (TrailBlazer, Envoy, Bravada)»(ref-188599-S12012786762005090700000) or «TRIM PANEL REPLACEMENT - REAR QUARTER - LEFT (TrailBlazer EXT, Envoy XL)»(ref-188599-S28144714242005090700000) , or «TRIM PANEL REPLACEMENT--REAR QUARTER--RIGHT (TrailBlazer, Envoy, Bravada)»(ref-188599-S38382049552005090200000) or «TRIM PANEL REPLACEMENT - REAR QUARTER - RIGHT (TrailBlazer EXT, Envoy XL)»(ref-188599-S13483986972005090700000) in Interior Trim.
5. Remove the inflator air switch from the vehicle.

1. Install the inflator air switch to the vehicle.
2. Install the rear quarter lower trim panel. Refer to «TRIM PANEL REPLACEMENT - REAR QUARTER - LEFT (TrailBlazer, Envoy, Bravada)»(ref-188599-S12012786762005090700000) or «TRIM PANEL REPLACEMENT - REAR QUARTER - LEFT (TrailBlazer EXT, Envoy XL)»(ref-188599-S28144714242005090700000) , or «TRIM PANEL REPLACEMENT--REAR QUARTER--RIGHT (TrailBlazer, Envoy, Bravada)»(ref-188599-S38382049552005090200000) or «TRIM PANEL REPLACEMENT - REAR QUARTER - RIGHT (TrailBlazer EXT, Envoy XL)»(ref-188599-S13483986972005090700000) in Interior Trim.
3. Raise the vehicle.
4. Connect the inflator air switch harness to the air compressor.
5. Lower the vehicle.

Scheme 14

Scheme 15

Scheme 16

1. Remove the air suspension system fuse.
2. Raise and support the vehicle. Refer to «LIFTING AND JACKING THE VEHICLE»(ref-189249) in General Information.
3. Raise and support the rear axle at the designed D-height. Refer to «TRIM HEIGHT SPECIFICATIONS»(ref-169289-S29808357902004120600000) . NOTE: Depressurize the air suspension system only after the rear axle is supported and is set between D- Height and Full Jounce.
4. Depressurize the air suspension system. Refer to «Air Suspension Depressurization Procedure»(ref-192074-S17807004652005091900000) . IMPORTANT: There is a raised feature on the outer rim of the air spring top plate that denotes the anti rotation peg position.
5. Depress the anti-rotation peg (2) in the air spring top plate located in the upper spring seat.
6. With the anti-rotation peg (2) depressed, rotate the air spring counterclockwise and remove the air spring from the upper spring seat.
7. Disconnect the air supply line from the air spring in the following way: Push the air supply line into the air spring connection and hold in place. Depress and hold the air supply line collet (2) down. Remove the air supply line (1) from the air spring.
8. Remove the air spring from the vehicle.

Scheme 17

Scheme 18

1. Install the air supply line to the air spring. Ensure the air supply line is fully seated. CAUTION: Ensure that the air spring is fully seated and properly positioned on the axle pilot. Failure to properly position the air spring may cause the air spring to break apart, possibly resulting in personal injury or damage to the vehicle.
2. Install the air spring (2) to the frame by aligning the mounting tabs (3) with the keyhole slots (1) in the upper spring seat.
3. Apply upward pressure to the air spring (2) and rotate clockwise until the anti-rotation peg snaps into place.
4. Pressurize the air suspension system. Refer to «Air Suspension Depressurization Procedure»(ref-192074-S17807004652005091900000) .
5. Lower the vehicle.
6. Install the air suspension system fuse.
7. Start the vehicle and run for approximately 1 minute to ensure that the air suspension system is functioning properly.
8. Inspect the D height. Refer to «TRIM HEIGHT INSPECTION PROCEDURE»(ref-169289-S28377472532004120600000) in Suspension General Diagnosis.

1. Remove the air suspension system fuse.
2. Raise and support the vehicle. Refer to «LIFTING AND JACKING THE VEHICLE»(ref-189249) in General Information. NOTE: Depressurize the air suspension system only after the rear axle is supported and is set between D- Height and Full Jounce.
3. Ensure that the air suspension system is depressurized before removing the air suspension air lines. Refer to «Air Suspension Depressurization Procedure»(ref-192074-S17807004652005091900000) .
4. Disconnect the air line from the air spring.
5. Disconnect the air line from the air compressor.
6. Trim off air line at the electrical harness with a sharp cutting tool. Leave remaining air line in the wiring harness.

1. Install air line to the air compressor using a new fitting.
2. Install air line to air spring.
3. Attach the air line to outside of the wiring harness using wire ties.
4. Lower vehicle.
5. Install air suspension system fuse.
6. Start vehicle and check for leaks.