GM Service Manual Online
For 1990-2009 cars only

The instrument cluster is equipped with a message center that can display 17 different messages. This feature provides the driver with specific warning/status messages associated with certain vehicle malfunctions and/or instructions to perform. Many messages coincide with indicators and Diagnostic Trouble Codes (DTCs) that may be set. The following table indicates possible messages that may be displayed by the cluster and what system is responsible for sending the request:

Warning/Status Message Display Diagnosis

Indicator/Message Center Status

Diagnosis

Source of Message

Battery Charge Fault

Refer to Battery Charge Warning Not Operating Properly

VCM/PCM

CARGO LAMP ON

Refer to CARGO LAMP Warning Not Operating Properly

BCM

CHANGE ENGINE OIL

Refer to CHANGE ENGINE OIL Warning Not Operating Properly

VCM/PCM

CHECK COOLANT TEMP

Refer to CHECK COOLANT TEMP Warning Not Operating Properly

VCM/PCM

CHECK ENG OIL LEVEL

Refer to CHECK ENG OIL LEVEL Not Operating Properly

VCM/PCM

CHECK ENG OIL PRESSURE

Refer to CHECK ENG OIL PRESSURE Not Operating Properly

Discrete wire from oil pressure sensor

ENGINE OVER-HEATED

Refer to ENGINE OVERHEATED Warning Not Operating Properly

VCM/PCM/IPC

LOW COOLANT

Refer to LOW COOLANT Warning Not Operating Properly

VCM/PCM

LOW FUEL

Refer to LOW FUEL Warning Not Operating Properly

VCM/PCM/IPC

LOW WASHER FLUID

Refer to LOW WASHER FLUID Warning Not Operating Properly and LOW WASHER FLUID Message Inoperative

Discrete wire from low washer switch

REDUCED ENGINE POWER

Refer to REDUCED ENG POWER Warning Not Operating Properly

PCM

SECURITY

Refer to Diagnostic System Check - Body Control System

BCM

SERVICE 4WD

Refer to SERVICE 4WD Warning Not Operating Properly

ATC

TRANS FLUID HOT

Refer to TRANS FLUID HOT Warning Not Operating Properly

VCM/PCM/IPC

TRANS HOT...IDLE ENGINE

Refer to TRANS HOT, IDLE ENG Warning Not Operating Properly

VCM/PCM/IPC

ABS Indicator

Refer to ABS Diagnostic System Check - ABS

EBCM

Air Bag Indicator

Refer to SIR Diagnostic System Check

Discrete wire from the SIR module

BRAKE Indicator

Refer to Brake Warning Indicator Always On or Brake Warning Indicator Inoperative

BCM

CRUISE Indicator

Refer to Cruise Control Warning Not Operating Properly

VCM/PCM

High Beam Indicator

Refer to High Beam Indicator Malfunction

BCM

Seat Belt Indicator

Refer to Fasten Safety Belt Warning Not Operating Properly

BCM

SES (service engine soon) Indicator

Refer to ABS Powertrain On Board Diagnostic (OBD) System Check for 4.3L Powertrain On Board Diagnostic (OBD) System Check 4.8L, 5.3L, and 6.0L engines.

Discrete wire from the VCM/PCM

TOW/HAUL Indicator

Refer to TOW/HAUL Warning Not Operating Properly

BCM

Turn Signal Indicator (left)

Refer to Turn Signal Indicator Inoperative - Left Side or Instrument Cluster Illumination Lamps Inoperative

Discrete wire from turn signal switch

Turn Signal Indicator (right)

Refer to Turn Signal Indicator Inoperative - Right Side or Instrument Cluster Illumination Lamps Inoperative

Discrete wire from turn signal switch

UPSHIFT Indicator

Refer to Shift Warning Not Operating Properly

VCM/PCM

4WD Indicator

Refer to 4WD Warning Not Operating Properly

VCM/PCM