Section 6 (Engine Controls - Tests W/Codes - V6): Introduction
WARNING: This page does not describe the selected car, but rather 25 other vehicles, including the 1992 Oldsmobile Bravada, 1992 GMC Vandura Special, 1992 GMC Vandura, 1992 GMC Value Van, and 1992 GMC Sonoma. However, it is still accessible from the selected car via links, so may be relevant.
Most engine control problems result from mechanical failures, poor electrical connections or damaged vacuum hoses. Before condemning the computer system, perform checks and inspections covered in article BASIC TESTING . Failure to do so may result in lost diagnostic time.
If no faults were found while in the BASIC TESTING article proceed with DIAGNOSTIC PROCEDURE. If no fault codes or only a non-running Code 12 is present and driveability problems exist, proceed to TESTS W/O CODES article in this section for diagnosis by symptom (I.E. ROUGH IDLE, NO START, ETC.). If only intermittent codes are present, see INTERMITTENTS in TESTS W/O CODES article.