Repair Validation
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 OFF for 5 seconds, Igniton ON, observe that the traction control off indicator functions by illuminating for 2 seconds then turns OFF.This is the bulb self test that operates upon every ignition key start cycle.