GM Service Manual Online
For 1990-2009 cars only

Diagnostic Fault Lamp Status

Diagnostic Procedure

Module

LFT, FRT, and SEN illuminated

Status Lamps Illuminated - LFT, FRT, and SEN

EBCM

RGT, FRT, and SEN illuminated

Status Lamps Illuminated - RHT, FRT, and SEN

EBCM

LFT, RER, and SEN illuminated

Status Lamps Illuminated - LFT, RER, and SEN

EBCM

RGT, RER, and SEN illuminated

Status Lamps Illuminated - RHT, RER, and SEN

EBCM

LFT, FRT, and MOD illuminated

Status Lamps Illuminated - LFT, FRT, and MOD

EBCM

RGT, FRT, and MOD illuminated

Status Lamps Illuminated - RHT, FRT, and MOD

EBCM

LFT, RER, and MOD illuminated

Status Lamps Illuminated - LFT, RER, and MOD

EBCM

RGT, RER, and MOD illuminated

Status Lamps Illuminated - RHT, RER, and MOD

EBCM

TRC, MOD, illuminated

Status Lamps Illuminated - TRC and MOD

EBCM

ECU illuminated

Status Lamps Illuminated - Engine Control Unit

EBCM

Green VLT OFF or flashing

Green VLT Status Lamp Inoperative

EBCM

Any other combination of illuminated LEDs

Status Lamps Illuminated - Invalid Combination

EBCM