Circuit/System Verification
WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Ignition ON, perform the IPC display test using a scan tool. Verify the indicator illuminates and turns OFF.
- If the indicator does not operate as expected during this test, replace the IPC.
- If the indicator functions normally during this test, replace the ECM/PCM.