GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2000 🢒 Century 🢒 Body and Accessories 🢒 Data Link Communications 🢒 Symptoms

Important: 

  1. Perform the Diagnostic System Check - Cruise Control before using the Symptom Tables in order to verify that all of the following are true:
    2.    • There are no DTCs set.
       • The Power Train Control Module (PCM) can communicate via the serial data link.
  2. Review the system operation in order to familiarize yourself with the system functions. Refer to Cruise Control System Operation .

Visual/Physical Inspection
    • Inspect for aftermarket devices which could affect the operation of the Cruise Control System. Refer to Checking Aftermarket Accessories in Wiring Systems.
    • Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Symptom List
    •  Cruise Control Inoperative/Malfunctioning
    •  Cruise Control Inoperative/Malfunctioning Using J 42958 Cruise Control Tester
    •  CRUISE Indicator Inoperative