Test Description

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 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. It is imperative that the vehicle be driven to attempt to reset the DTC. Using the scan tool to perform a function test may not produce the same result, and therefore may cause misdiagnosis of the vehicle.
7. This step tests if the EBCM is capable of activating the ABS pump motor.
8. A shorted ABS pump motor may damage the EBCM. It is imperative that the steps in the table be followed in order to prevent damage to a replacement EBCM.

Fig 1: DTC C0267 Or C0268 (Steps 1-3)

Courtesy of GENERAL MOTORS CORP.

Fig 2: DTC C0267 Or C0268 (Steps 4-6)

Courtesy of GENERAL MOTORS CORP.

Fig 3: DTC C0267 Or C0268 (Steps 7-15)

Courtesy of GENERAL MOTORS CORP.