Test Description

WARNING: This page is about a different car, the 2002 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.

The number(s) below refer to the step number(s) on the diagnostic table.

2. Lack of communication may be due to a partial malfunction of the class 2 serial data circuit or due to a total malfunction of the class 2 serial data circuit. The specified procedure will determine the particular condition.
3. The symptom list in Symptoms will determine the correct diagnostic procedure to use.

Fig 1: Diagnostic System Check - Cruise Control
Courtesy of GENERAL MOTORS CORP.

Fig 2: Scan Tool Output Controls
Courtesy of GENERAL MOTORS CORP.