Self-Diagnostic System: Notes
WARNING: This page is about a different car, the 1999 GMC Sierra and 1999 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Use of scan tool is required for reading and clearing DTC(s). BCM does not turn on SERVICE ENGINE SOON indicator light. It will turn on SECURITY indicator light for Passlock(tm) system related malfunctions.