GM Service Manual Online
For 1990-2009 cars only

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

  1. Perform the Diagnostic System Check - Vehicle, 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. Refer to the following systems description:
  4. •  Door Ajar Indicator Description and Operation
    •  Fuel Fill Door Description and Operation
    •  Luggage Compartment Description and Operation
    •  Power Door Latch Description and Operation
    •  Power Door Locks Description and Operation

Visual/Physical Inspection

    • Inspect for aftermarket devices which may affect the operation of the system. Refer to Checking Aftermarket Accessories.
    • Inspect the easily accessible or visible system components for obvious damage or conditions which may 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.

Symptom List

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

    •  Fuel Filler Door Release Malfunction
    •  Door Ajar Indicator Malfunction
    •  Power Door Latch System Malfunction
    •  Power Door Locks Malfunction
    •  Trunk Release Malfunction
    •  Trunk Ajar Indicator Malfunction