Diagnostic Aids
WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- The incremental position sensor and the rotational position sensor both show position in degrees, and should track each other. Monitor these sensors for erratic or unreasonable readings.
- If the incremental position sensor is determined to be bad, the entire transfer case actuator will have to be replaced, as the incremental sensor is part of the actuator and cannot be replaced independently.
- The transfer case fill and drain plugs are good sources for ground.