Diagnostic Test Light for VS (V6 / V8) Auto Engines Only
Once connected with the switch in the off position, this unit acts as an engine fault warning light.
When a fault is detected, the light illuminates to indicate an issue.
Switch the vehicle off and then turn the ignition back on (without the engine running)
Depressing the switch display’s the diagnostic trouble code (DTC) starting from the lowest code number.
Use either the chart provided with the instructions or refer to the GM manual for details of the code.
- Diagnostic Test Light
- Loom Connector
- Installation Hardware
- Downloadable Instructions (requires login)
- Commodore VS (V6 / V8 Auto Engines Only)