Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSBUICK1998RIVIERAREPAIR AND DIAGNOSISSUSPENSIONELECTRONIC SUSPENSIONSUSPENSION - ELECTRONIC LEVEL CONTROLADJUSTMENTSHEIGHT SENSOR
1998 Buick Riviera
Height Sensor
1998 Buick RivieraSECTION Height Sensor
NOTE:
Optional Height Sensor Adjustment Tool (J-34825) can be used to adjust height sensor. Follow tool manufacturer's instructions.
- Park vehicle on level surface. Ensure fuel tank is full. If necessary, simulate full tank by adding about 7 lbs. (3.2 kg) of weight to rear of vehicle for each gallon of fuel that is not in tank. Ensure vehicle is unloaded and tire inflation pressure is correct. Move front seats rearward.
- Turn ignition on to activate ELC system. Bounce rear of vehicle 3 times to normalize suspension. Measure 23 1/2" (600 mm) from center of rear wheel towards front of vehicle. See Fig 2 . Measure trim/rear ride height from this point.
- If rear ride height varies by more than 3/4" (19 mm) from side to side or is lower than 9" (229 mm), repair suspension problem before continuing procedure. If rear ride height is within specification, height sensor is adjusted correctly.
- If rear ride height is not within specification, loosen lock bolt on sensor actuating arm. See Fig 1 . Move plastic arm upward or downward as necessary to increase or decrease rear ride height. To increase rear ride height, move plastic arm upward. To decrease rear ride height, move plastic arm downward. Tighten lock bolt.
NOTE:
Height sensor can be adjusted a total of 5 degrees. One degree of change at height sensor results in a 1/4" (6 mm) change in height at rear bumper.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.