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Home >> GMC >> 2002 >> Jimmy 2D Utility, Part Time, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1493 (Suspension Control System - Suspension Leveling) >> Repair Instructions >> Rear Air Spring Level Sensor Calibration >> Calibration Procedure
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Calibration Procedure

WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle   in General Information.
  2. Remove the rear tire and wheels. Refer to TIRE AND WHEEL REMOVAL AND INSTALLATION  .
  3. Lower the vehicle with the rear axle supported by the jackstands.
    G00615604Courtesy of GENERAL MOTORS CORP.
  4. Raise or lower the vehicle until the D-height measurement is 25 mm (1 in) above the published D-height specification 160 mm (6.33 in).
  5. Turn the ignition key to the ON position. This will partially deflate the air spring.
  6. After two minutes, turn the ignition key to the OFF position and remove the air suspension fuse. Refer to Electrical Center Identification Views.
    G00615605Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: A D-height gauge block (1) can be used to determine the D-height position. Create a D-height gauge block using metal stock to 20 mm X 30 mm X the published D-height specification 135 mm (5.33 in). Use the block (1) as a measuring device only.
  7. Raise or lower the vehicle so that the left side D-height is at a published specification 135 mm (5.33 in).
    G01597483Courtesy of GENERAL MOTORS CORP.
  8. Loosen the air spring level sensor to the frame mounting bolts.
    9. IMPORTANT: If not equipped, use a new anti-rotation bolt (P/N 11569736).
    NOTE: Refer to Fastener Notice in Cautions and Notices.
    IMPORTANT: Do not remove the air spring level sensor locating pin until the air spring level sensor has been properly mounted and aligned.
  9. Loosely install the sensor mounting bolts with the anti-rotation bolt in the right hand mounting hole.
    G01597484Courtesy of GENERAL MOTORS CORP.
  10. Install the air spring level locating pin. A 4 mm drill bit or equivalent can be substituted.

    Tighten 

    1. While holding the body of the sensor, tighten the anti-rotation bolt first.
    2. Tighten the air spring level sensor frame mounting bolts to 8 N.m (71 lb in).
  11. Verify the pin can be removed and installed with ease to ensure the correct sensor installation. If the pin cannot be inserted with ease, loosen the sensor fasteners, adjust the sensor, and retighten the sensor fasteners until the pin can be removed and installed with ease.
    NOTE: Failure to remove the air suspension auto level control sensor locating pin will cause damage to the air suspension auto level control sensor.
  12. Remove the air spring level sensor locating pin.
  13. Perform the sensor calibration for the right side.

    Tighten 

    Raise or lower the vehicle so the left side D-height is 110 mm from the right side of the vehicle.

  14. Raise the vehicle off the jackstands and remove the jackstands from under the vehicle.
  15. Install the rear tire and wheels. Refer to TIRE AND WHEEL REMOVAL AND INSTALLATION  .
  16. Lower the vehicle.
  17. Install the air suspension system fuse.
  18. Turn the ignition key to the ON position to inflate the rear air springs.
  19. After two minutes, turn the ignition key to the OFF position.
  20. Recycle the ignition, if needed.
  21. Verify and record the D-height. Refer to Trim Height Inspection Procedure   in Suspension General Diagnosis.
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