Diagnostic Aids

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

A short to voltage may cause some accessories to operate with the ignition key out and cause a low battery after extended non vehicle use.
PCB relays are soldered on the fuse block and cannot be replaced separate from the fuse block. If PCB relay replacement is necessary the fuse block will need to be replaced.