Diagnostic Aids
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.
If diagnosing a Horn - Poor Tone condition, inspect the following:
- Debris or water in the horn assembly.
- Proper horn mounting hardware torque. Refer to Fastener Tightening Specifications .
- Debris in the joint where the horns attach to the vehicle.