GM Service Manual Online
For 1990-2009 cars only

Important: The following steps must be completed before using the symptom tables.

  1. Perform the Diagnostic System Check - Vehicle in Vehicle DTC Information before using the Symptom Tables in order to verify that all of the following are true:
  2. • There are no DTCs set.
    • The control modules can communicate via the serial data link.
  3. Review the system operation in order to familiarize yourself with the system functions:
  4. •  Power Windows Description and Operation
    •  Power Door Locks Description and Operation
    •  Door Ajar Indicator Description and Operation

Visual/Physical Inspection

    • Inspect for aftermarket devices which could affect the operation of the door systems. Refer to Checking Aftermarket Accessories in Wiring Systems.
    • Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

    •  Power Windows Inoperative - All
    •  Power Window Express Down Function Inoperative
    •  Power Window Lockout Function Inoperative
    •  Power Window Inoperative - Driver Door
    •  Power Window Inoperative - Passenger Door
    •  Door Ajar Indicator Malfunction
    •  Power Door Locks Inoperative
    •  Power Door Lock Key Cylinder Switches Inoperative
    •  Automatic Door Locks Inoperative
    •  Power Mirrors Inoperative
    •  Heated Mirrors Inoperative