Engine Electrical Symptoms: Notes
WARNING: This page does not describe the selected car, but rather 12 other vehicles, including the 2003 GMC Yukon XL, 2003 GMC Yukon, 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, and 2003 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
The following steps must be completed before using the symptom tables.
- Perform ENGINE ELECTRICAL DIAGNOSTIC SYSTEM CHECK 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:
- See DESCRIPTION & OPERATION .
- See DESCRIPTION & OPERATION in GENERATORS & REGULATORS .