Diagnostic Aids

WARNING: This page is about a different car, the 2003 Pontiac Aztek and 2003 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

Important: Perform the following in order to avoid misdiagnosis.

Inspect for proper operation of the brake lamps.
Inspect for proper operation of the transmission range switch.
Inspect throttle linkage for mechanical binding which could cause the system to malfunction.

Fig 1: Cruise Control Inoperative/Malfunctioning Diagnosis (Steps 1-9)
Courtesy of GENERAL MOTORS CORP.

Fig 2: Cruise Control Inoperative/Malfunctioning Diagnosis (Steps 10-20)
Courtesy of GENERAL MOTORS CORP.

Fig 3: Cruise Control Inoperative/Malfunctioning Diagnosis (Steps 21-31)
Courtesy of GENERAL MOTORS CORP.

Fig 4: Cruise Control Inoperative/Malfunctioning Diagnosis (Steps 32-35)
Courtesy of GENERAL MOTORS CORP.