Circuit/System Testing
WARNING: This page is about a different car, the 2007 GMC Sierra, 2007 GMC Cab & Chassis Sierra, 2007 Chevrolet Silverado, and 2007 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Measure the following circuits for high resistance:
- Low reference circuit
- Signal circuit
- If high resistance is found, repair the affected circuit.
- If no resistance is found, replace the IA valve.