Envoy, Rainer, Trailblazer 2006-2007

Rear Air Suspension

Print

Air Springs



Removal & Installation
  1. Depressurize the air suspension system.
    NOTE
    There is a raised feature on the outer rim of the air spring top plate that denotes the anti-rotation peg position.

  2.  
  3. Depress the anti-rotation peg (2) in the air spring top plate located in the upper spring seat.
  4.  
  5. With the anti rotation peg (2) depressed, rotate the air spring counterclockwise and remove the air spring from the upper spring seat.
  6.  
  7. Disconnect the air supply line from the air spring in the following way:
    1. Push the air supply line into the air spring connection and hold in place.
    2.  
    3. Depress and hold the air supply line collet down.
    4.  
    5. Remove the air supply line from the air spring.
    6.  

  8.  
  9. Remove the air spring.
  10.  

To install:

Click image to see an enlarged view

Fig. Locating anti-rotation peg in air spring



Click image to see an enlarged view

Fig. Air spring mounting

  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.  
  3. Install the air spring (2) to the frame by aligning the mounting tabs (3) with the keyhole slots (1) in the upper spring seat.
  4.  
  5. Apply upward pressure to the air spring and rotate clockwise until the anti-rotation peg snaps into place.
  6.  
  7. Pressurize the system.
  8.  
  9. Lower the vehicle.
  10.  
  11. Install the air suspension system fuse.
  12.  
  13. Start the vehicle and run for approximately 1 minute to ensure that the air suspension system is functioning properly.
  14.  
  15. Check the axle height.
  16.  

Compressor



Removal & Installation

WARNING
A sudden release of pressure may cause personal injury or damage to the vehicle. The air suspension system is under pressure until the air supply lines are disconnected. Use the following precautions when servicing the air suspension system: Wear gloves, ear protection, and eye protection. Wrap a clean cloth around the air supply lines.


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


WARNING
Remove the air suspension system fuse before working on the rear suspension components or the rear axle. Failure to remove the air suspension system fuse could cause the calibration of the air suspension leveling sensor to change and the air suspension system not to function properly.

  1. Remove the air suspension system fuse.
  2.  
  3. Raise and safely support the rear of the vehicle securely on jackstands.
  4.  
  5. Remove the air spring compressor to the frame mounting bolts.
  6.  
  7. Disconnect the air inflator switch electrical connection, air supply lines, and air spring compressor vent hose from the air spring compressor.
  8.  
  9. Disconnect the air spring compressor electrical connection (2).
    NOTE
    Ensure the color on air supply lines match the color on the air spring compressor for reassembly.

  10.  
  11. Disconnect the air supply lines (3) from the air spring compressor (1).
  12.  
  13. Remove the air spring compressor from the vehicle.

    Click image to see an enlarged view

    Fig. Air spring compressor mounting

  14.  

To install:


WARNING
Inspect the air supply lines for deep scores or cuts. If the air supply lines are damaged, the lines must be replaced. Ensure the color on the air supply lines match the color on the air spring compressor for reassembly.

  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 and tighten the fittings to 20 inch lbs. (2.25 Nm).
  2.  
  3. If damage is evident to the air supply lines, then replace the air supply lines.
  4.  
  5. Connect the air spring compressor electrical connection (2).
  6.  
  7. Connect the air inflator switch electrical connection, air supply line, and air spring compressor vent hose to the air spring compressor.
  8.  
  9. Install the air spring compressor to the frame mounting bolts and tighten the bolts to 20 N·m (15 lb ft).
  10.  
  11. Lower the vehicle.
  12.  
  13. Install the air suspension system fuse.
  14.  
  15. Start the vehicle and run for approximately 1 minute to ensure that the air spring leveling system is functioning properly.
  16.  
  17. Inspect the designed D - height to measure 5.17-5.49 inches (131.4-139.4mm).
  18.  
  19. Inspect for leaks. If a leak is found at the air supply lines connections at the air spring compressor, replace the air supply lines.
  20.  

Depressurizing




CAUTION
A sudden release of pressure may cause personal injury or damage to the vehicle. The air suspension system is under pressure until the air supply lines are disconnected. Wear gloves, ear protection, and eye protection. Wrap a clean cloth around the air supply lines.

  1. Remove the air suspension system fuse.
  2.  
  3. Raise and support the vehicle.
  4.  
  5. Raise and support the rear axle at the designed height of 5.33 in. (135.4mm) on non-air suspension models or 6.12 in. (155.4mm) on air suspension models.
  6.  
  7. Remove the air compressor mounting bolts from the frame and support air compressor.
  8.  
  9. Loosen both of the air supply line connections at the air compressor in order to depressurize the air springs.
  10.  
  11. To pressurize the system, tighten the air supply lines to the air compressor to 20 inch lbs. (2.25 Nm).
  12.  
  13. Install the air compressor to frame mounting bolts and tighten to 15 ft. lbs. (20 Nm).
  14.  
  15. Lower the vehicle.
  16.  
  17. Install the air suspension system fuse.
  18.  
  19. Start the vehicle and run for approximately 1 minute to ensure that the air suspension system is functioning properly.
  20.  
  21. Check the axle height.
  22.  

Lower Control Arm



Removal & Installation
  1. Raise and support the vehicle.
  2.  
  3. Remove the wheel and tire.
  4.  
  5. Raise and support the rear axle at the designed height of 6.12 in. (155.4mm).
  6.  
  7. Depressurize the air suspension system.
  8.  
  9. Remove the rear axle lower control arm to the axle mounting nut and bolt.
  10.  
  11. Remove the rear axle lower control arm to the frame mounting nut and bolt.
  12.  
  13. Remove the lower control arm.
  14.  

To install:

  1. Install the lower control arm.
  2.  
  3. Install the rear axle lower control arm to the frame mounting nut and bolt.
  4.  
  5. Install the rear axle lower control arm to the axle mounting bolt and nut and tighten to 74 ft. lbs. (100 Nm).
  6.  
  7. Remove the rear axle support.
  8.  
  9. Lower the vehicle.
  10.  

Rear Axle Brace



Removal & Installation


Click image to see an enlarged view

Fig. Rear axle brace mounting

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Raise and safely support the rear of the vehicle securely on jackstands.
  4.  
  5. Raise and support the rear axle at the designed D - height of 5.17-5.49 inches (131.4-139.4mm).
  6.  
  7. Depressurize the air suspension system.
  8.  
  9. Remove the rear axle brace and rear axle tie rod to the rear axle mounting bolt.
  10.  
  11. Remove the rear axle brace to frame mounting nut.
  12.  
  13. Remove the rear axle brace from the vehicle.
  14.  

To install:

  1. Install the rear axle brace to the vehicle.
  2.  
  3. Install the rear axle brace to frame mounting nut and tighten to 70 ft. lbs. (95 Nm).
  4.  
  5. Install the rear axle brace and rear axle tie rod to the rear axle mounting bolt and tighten to 140 ft. lbs. (190 Nm).
  6.  
  7. Remove the rear axle support.
  8.  
  9. Lower the vehicle.
  10.  

Tie Rod



Removal & Installation
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Raise and safely support the rear of the vehicle securely on jackstands.
  4.  
  5. Raise and support the rear axle at the designed D - height of 5.17-5.49 inches (131.4-139.4mm).
  6.  
  7. Depressurize the air suspension system.
  8.  
  9. Remove the rear axle tie rod to the axle mounting bolt and nut.
  10.  
  11. Remove the rear axle tie rod to frame mounting bolt and nut.
  12.  
  13. Remove the rear axle tie rod from the vehicle.
  14.  

To install:


NOTE
When installing the rear axle tie rod the bushings inner sleeve off set (largest gap) is towards the rear axle.

  1. Install the rear axle tie rod to the vehicle.
  2.  
  3. Install the rear axle tie rod to frame mounting bolt and nut.
  4.  
  5. Install the rear axle tie rod to the axle mounting bolt and nut and tighten the mounting bolts to 140 ft. lbs. (190 Nm).
  6.  
  7. Remove the rear axle support.
  8.  
  9. Lower the vehicle.
  10.  

Upper Control Arm



Removal & Installation


Click image to see an enlarged view

Fig. Upper control arm mounting

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Raise and safely support the rear of the vehicle securely on jackstands.
  4.  
  5. Remove the tire and wheel.
  6.  
  7. Remove the wheelhouse panel.
  8.  
  9. Raise and support the rear axle at the designed D - height of 5.17-5.49 inches (131.4-139.4mm).
  10.  
  11. Depressurize the air suspension system.
  12.  
  13. Disconnect the air suspension leveling sensor link from the rear axle upper control arm.
  14.  
  15. Remove the rear axle upper control arm to axle mounting bolt and nut.
  16.  
  17. Remove the rear axle upper control arm to frame mounting bolt.
  18.  
  19. Remove the rear axle upper control arm.
  20.  

To install:

  1. Install the rear axle upper control arm.
  2.  
  3. Install the rear axle upper control arm to frame mounting bolt.
  4.  
  5. Install the rear axle upper control arm to axle mounting nut and bolt and tighten the bolts to 97 ft. lbs. (131 Nm).
  6.  
  7. Connect the air suspension leveling sensor link to the rear axle upper control arm.
  8.  
  9. Remove the rear axle support.
  10.  
  11. Install the wheelhouse panel.
  12.  
  13. Install the tire and wheel.
  14.  
  15. Lower the vehicle.
  16.  

 
label.common.footer.alt.autozoneLogo