Symptoms - Engine Electrical: Notes

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 Chevrolet Tahoe, 2002 Chevrolet Suburban, and 2002 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: The following steps must be completed before using the symptom tables.

Perform DIAGNOSTIC SYSTEM CHECK - Engine Electrical before using the Symptom Tables in order to verify that all of the following are true:
- There are no DTCs set.
- The control module(s) can communicate via the serial data link.
Review the system operation in order to familiarize yourself with the system functions. Refer to one of the following system operations: