Air Suspension Height Sensor

This procedure covers the removal and replacement of the air suspension height sensor on the rear suspension of a 2014-2018 Chevrolet Silverado 1500 with the 5.3L V8 engine and air suspension system.

Warnings

Tools required

Parts

• Air suspension height sensor × 1 — Use OEM specification
• Height sensor mounting bolts (if corroded) × 2 — M8 x 1.25 mounting bolts

Preparation

1. Park vehicle on level surface and engage parking brake
2. Place wheel chocks in front of front wheels
3. If equipped with air suspension control, set system to normal ride height mode
4. Turn ignition off and wait 2 minutes for air suspension system to stabilize
5. Loosen rear wheel lug nuts while vehicle is on ground

Procedure

1. 1

   Raise and support vehicle
   Raise the rear of the vehicle using a floor jack at the rear differential or frame rail. Support the vehicle securely on jack stands placed under the frame rails. Remove the rear wheel on the side where the sensor is being replaced.
2. 2

   Locate the height sensor
   The air suspension height sensor is mounted to the rear axle housing or suspension component, typically near the rear shock absorber. The sensor has a linkage arm that connects to the suspension control arm or frame. Identify the sensor and its mounting location.
3. 3

   Disconnect electrical connector
   Locate the electrical connector on the height sensor. Press the release tab and pull the connector away from the sensor. If the connector is difficult to remove, gently wiggle it while pulling. Inspect the connector terminals for corrosion or damage.
4. 4

   Disconnect sensor linkage arm
   Locate the ball joint or clip connection where the sensor linkage arm attaches to the control arm or frame. If equipped with a clip, use pliers to compress the retaining clip and slide it off. If equipped with a ball socket, disconnect by pulling the ball end from the socket. Note the orientation and position for reinstallation.
   ℹ️Take a photo of the linkage arm position before removal to ensure correct installation angle.
5. 5

   Remove sensor mounting bolts
   Remove the two mounting bolts securing the height sensor to its bracket on the axle housing or suspension component. If bolts are corroded, apply penetrating oil and allow to soak for several minutes. Support the sensor while removing the final bolt to prevent it from falling.
6. 6

   Remove old sensor
   Carefully remove the height sensor from the vehicle. Inspect the mounting bracket for damage, corrosion, or cracks. Clean the mounting surface with a wire brush if necessary. Check that the linkage arm attachment point moves freely without binding.
7. 7

   Install new sensor
   Position the new height sensor on the mounting bracket, aligning the mounting holes. Install the mounting bolts finger-tight. Ensure the sensor is oriented correctly with the linkage arm positioned toward its attachment point.
8. 8

   Connect linkage arm
   Attach the sensor linkage arm to the control arm or frame attachment point. Ensure the ball socket is fully seated or the retaining clip is properly installed. Verify the linkage arm moves freely through its full range of motion without binding or interference.
9. 9

   Connect electrical connector
   Reconnect the electrical connector to the height sensor, pressing firmly until you hear or feel the locking tab click into place. Gently tug on the connector to verify it is fully seated and locked.
10. 10

    Reinstall wheel and lower vehicle
    Reinstall the rear wheel and thread the lug nuts by hand. Lower the vehicle until the wheel just contacts the ground but the suspension is not yet loaded. Torque the lug nuts in a star pattern to specification. Fully lower the vehicle and remove jack stands.
11. 11

    Calibrate height sensor
    Start the engine and allow the air suspension system to initialize. If equipped with a diagnostic scan tool, perform the height sensor calibration procedure according to manufacturer specifications. If no scan tool is available, drive the vehicle at speeds above 20 mph for at least 5 minutes to allow the system to self-calibrate. Monitor for any suspension fault lights on the instrument cluster.
    ℹ️Some vehicles may require a scan tool to clear fault codes and complete sensor calibration. Check for diagnostic trouble codes after installation.

Reassembly

1. Ensure all electrical connections are fully seated and locked
2. Verify linkage arm moves freely through full suspension travel range
3. Check that mounting bolts are torqued to specification and sensor is secure
4. Test air suspension operation through all ride height settings if equipped with adjustable suspension

Verification

• Start the vehicle and verify no air suspension warning lights are illuminated on the instrument cluster
• If equipped with adjustable air suspension, cycle through all ride height settings and verify proper operation
• Drive the vehicle and confirm normal suspension operation and ride height control
• Use a diagnostic scan tool to verify height sensor is reporting proper values and no fault codes are present
• Visually inspect sensor linkage arm during suspension movement to ensure proper range of motion

Related trouble codes on this vehicle

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