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 DIAGNOSIS (SINGLE PAGE)EXTERNAL PAGESDIFFERENT CARSECTION 31 (CRUISE CONTROL SYSTEM)TESTINGSYSTEM TEST
1998 Buick Riviera
System Test
1998 Buick RivieraSECTION System Test
WARNING: This page is about a different car, the 1998 Pontiac Bonneville, 1998 Oldsmobile Regency, 1998 Oldsmobile LSS, 1998 Oldsmobile Eighty-Eight, and 1998 Buick LeSabre. However, it is still accessible from the selected car via links, so may be relevant.
- Drive vehicle at a speed greater than 25 MPH. Move cruise control main switch to ON position. Press SET button once and release. Remove foot from accelerator pedal. Vehicle should maintain set speed.
- Hold slider switch in R/A position until vehicle speed increases 4-5 MPH. Vehicle should accelerate and maintain new set speed. Press SET button until vehicle speed decreases 4-5 MPH. Vehicle should decelerate and maintain new set speed.
- Depress brake pedal slightly. Cruise control system should disengage. Press slider switch to R/A position once and release. Vehicle should accelerate and maintain previously set speed. Tap-up R/A switch (less than 3/4 of a second). Vehicle speed should increase one MPH. Tap-down SET button (less than 3/8 of a second). Vehicle speed should decrease one MPH.
- Simultaneously press SET button and R/A switch. Cruise control system should disengage, but retain previously set speed in memory. Move main switch to OFF position. Cruise control system should disengage, and set speed should be erased from memory.
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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.