GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Cruise Control Schematics

Connector End View Reference: Cruise Control Connector End Views

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

2

  1. Turn OFF the ignition.
  2. Install a scan tool.
  3. Turn ON the ignition, with the engine OFF.
  4. With the scan tool, command the Cruise Control Lamp Test parameter ON, in the instrument panel cluster (IPC) Special Functions.

Does the Cruise indicator illuminate in the IPC?

Go to Step 4

Go to Step 3

3

Replace the IPC. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 5

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4

Replace the powertrain control module (PCM). Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 5

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5

Operate the system in order to verify the repair.

Does the system operate properly?

System OK

Go to Step 2