Circuit/System Verification
WARNING: This page is about a different car, the 2007 Pontiac G6. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
This procedure is for diagnosing problems with the OnStar® button assembly LED.
Ignition ON, With the scan tool command the VCIM to turn on the red and green LED.
- If the red or green LED indicators do not illuminate, go to Circuit/System Testing.