GM Service Manual Online
For 1990-2009 cars only

Telltale

ACC Position

OFF Position

UNLOCK Position

RUN Position

CRANK Position

PRNDL

OFF

OFF

PCM/VCM Class 2 controlled

PCM/VCM Class 2 controlled

OFF

Odometer

OFF

OFF

Normal Display

2 second segment functional test followed by IPC controlled

OFF

Battery Telltale (Charging System)

OFF

OFF

ON

    â€¢ The engine is not running.
    â€¢ ON; the engine is running.
    â€¢ 3 second bulb check
    â€¢ PCM/VCM Class 2 controlled.

OFF

ABS Telltale

OFF

OFF

OFF

    â€¢ 3 second bulb check
    â€¢ ABS module Class 2 controlled

OFF

Seat Belt Telltale (Unbuckled)¹

OFF

OFF

OFF

BCM Class 2 controlled

BCM Class 2 controlled

High Beam Telltale

BCM Class 2 controlled

BCM Class 2 controlled

BCM Class 2 controlled

BCM Class 2 controlled

OFF

Security Telltale

BCM Class 2 controlled

BCM Class 2 controlled

BCM Class 2 controlled

    â€¢ 3 second bulb check
    â€¢ BCM Class 2 controlled

BCM Class 2 controlled

Gate Ajar Telltale

OFF

OFF

OFF

BCM Class 2 controlled

OFF

Service 4WD Telltale

OFF

OFF

OFF

The ATC module Class 2 controlled

OFF

Low Fuel Telltale

OFF

OFF

OFF

    â€¢ 3 second bulb inspection
    â€¢ IPC controlled

OFF

Inspect Gauges Telltale

OFF

OFF

OFF

    â€¢ 3 second bulb inspection
    â€¢ IPC controlled

OFF

Upshift Telltale (Manual Trans Only)

OFF

OFF

OFF

PCM/VCM Class 2 controlled

OFF

Overspeed Telltale (Export Only)

OFF

OFF

OFF

    â€¢ 3 second bulb inspection
    â€¢ BCM Class 2 controlled

OFF

Brake Telltale

OFF

OFF

OFF

    â€¢ The park brake function: The 3 second bulb inspection followed by the BCM Class 2 controlled
    â€¢ The brake function: The 3 second bulb check followed by the ABS Class 2 controlled

The park brake function: The BCM Class 2 controlled

The brake function: OFF

¹ Seat Belt telltale cycle is 20 seconds continuous ON followed by 55 seconds flashing.