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Suspension Control System - Suspension Leveling: Adjustments GMC Envoy II

Electronic Suspension ~305 words

Air Spring Sensor Calibration

  1. Remove the air suspension system fuse.
  2. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(ref-200385-S41061932852005102000000) in General Information.
  3. Raise and support the rear axle at the designed D height. Refer to «Trim Height Specifications»(ref-200415-S00525091112005102000000) in Suspension General Diagnosis.
  4. Remove the rear tire and wheels. Refer to «Tire and Wheel Removal and Installation»(ref-200391-S25606786272005102000000) in Tires and Wheels.
  5. Remove the air compressor mounting bolts from the frame and support air compressor.
  6. Loosen both of the air supply line connections at the air compressor in order to depressurize the air springs.
  7. Support the rear axle and set the rear axle to proper D height. Refer to «Trim Height Specifications»(ref-200415-S00525091112005102000000) in Suspension General Diagnosis.
  8. Loosen the air spring level sensor to the frame mounting bolts.
  9. Install air spring level sensor locating pin. Use proper size drill bit that fits snugly.
  10. Tighten 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).
  11. Remove the air spring level sensor locating pin.
  12. 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).
  13. 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).
  14. Install the rear tire and wheels. Refer to «Tire and Wheel Removal and Installation»(ref-200391-S25606786272005102000000) in Tires and Wheels.
  15. Remove the rear axle support.
  16. Lower the vehicle.
  17. Install the air suspension system fuse.
  18. Start the vehicle and run for approximately 1 minute to ensure that the air suspension system is functioning properly.
  19. Check the D height. Refer to «Trim Height Inspection Procedure»(ref-200415-S18418224712005102000000) in Suspension General Diagnosis.

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