S&T Series Blazer, Bravada, Envoy, Jimmy, Rainier, Trailblazer, Xtreme

Diagnostic Trouble Codes


Each OBD II Diagnostic Trouble Code (DTC) is directly related to a particular Monitor Test. The Diagnostic Management System sets codes based on the failure of the tests during a trip (or trips). Certain tests must fail during two consecutive trips before the DTC is set.