Circuit/System Verification
WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Place the vehicle in 2WD install a scan tool and using engine data 2 look at the display for 2WD signal.
- Verify that the scan tool indicates that the vehicle is in 2WD.
- If the scan tool indicates that the vehicle is in 4WD go to Circuit/System Testing .