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 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:
  4. •  Instrument Cluster Description and Operation
    •  Indicator/Warning Message Description and Operation
    •  Audible Warnings Description and Operation

Visual/Physical Inspection

    • Inspect for aftermarket devices which could affect the operation of the instrument panel cluster or audible warnings system. Refer to Checking Aftermarket Accessories .
    • Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
    • Inspect for the proper fluid levels.

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:

Gages, PRNDL, and Odometer

    •  Shift Indicator Indicates Wrong Gear Selection for the 4T40-E/4T45-E transaxle
    •  Engine Coolant Temperature Gage Inaccurate or Inoperative
    •  Fuel Gage Inaccurate or Inoperative
    •  Odometer Trip/Reset Switch Inoperative
    •  Speedometer and/or Odometer Inaccurate or Inoperative
    •  Tachometer Inaccurate or Inoperative

Indicators

    •  Brake Warning Indicator Always On
    •  Brake Warning Indicator Inoperative
    •  ABS Indicator Always On
    •  ABS Indicator Inoperative
    •  Low Traction Indicator Always On
    •  Low Traction Indicator Inoperative
    •  Traction Off Indicator Always On
    •  Traction Off Indicator Inoperative
    •  Engine Coolant Temperature Indicator Always On
    •  Charge Indicator Always On
    •  Malfunction Indicator Lamp (MIL) Inoperative for the 2.2L engine
    •  Malfunction Indicator Lamp (MIL) Always On for the 2.2L engine
    •  Malfunction Indicator Lamp (MIL) Diagnosis for the 3.5L engine
    •  Malfunction Indicator Lamp (MIL) Diagnosis for the 3.9L engine
    •  Engine Oil Pressure Indicator Always On
    •  Low Fuel Indicator Inoperative
    •  Outside Air Temperature Display Inaccurate or Inoperative
    •  High Beam Indicator Inoperative
    •  Turn Signal Lamps and/or Indicators Inoperative
    •  Symptoms - Seat Belts
    •  Air Bag Indicator Circuit Malfunction
    •  Cruise Control Inoperative/Malfunctioning
    •  Security Indicator Inoperative

Audible Warnings

    •  Chime Always On
    •  Chime Inoperative