Test Description

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

1. 2. This step checks to see if the fault condition is active or intermittent.
2. 3. This step checks to see if a history DTC C0550 will return.
3. 4. This step checks to see if the vehicle has a known intermittent problem.

Fig 1: DTC C0550

Courtesy of GENERAL MOTORS CORP.