Test Description

WARNING: This page is about a different car, the 2002 Oldsmobile Bravada. 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. Determines if the Rear Propshaft Speed Sensor and wiring are working properly.
3. Determines if the Front Propshaft Speed Sensor and wiring are working properly.
4. Helps determine if the DTC set due to a mechanical or an electrical failure.
5. Tests the integrity of the Motor Feed circuits.
6. Determines whether the transfer case is mechanically functioning properly.

Fig 1: DTC C0374 (Steps 1-5)

Courtesy of GENERAL MOTORS CORP.

Fig 2: DTC C0374 (Steps 6-10)

Courtesy of GENERAL MOTORS CORP.