Diagnostic Aids

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

This diagnostic is for the audio steering wheel controls.
Before diagnosis of the steering wheel controls, ensure the primary controls of the associated component are functioning properly.
Review schematic when testing switch resistance values.
If a single switch function is inoperative, test the suspect switch. Refer to Component Testing .