Test Description

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

2) - Helps determine if the DTC set due to a mechanical or an electrical fault.
3) - Tests the integrity of the Motor Control circuit.
4) - Determines whether the Encoder Motor is moving to the proper position.

Fig 1: DTC C0374 Diagnosis

Courtesy of GENERAL MOTORS CORP.