Circuit/System Verification
WARNING: This page is about a different car, the 2007 Buick Lucerne. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition ON, verify DTC U1500 is set as current.
- If DTC U1500 is not current, refer to Testing for Intermittent Conditions and Poor Connections .
- Replace the VCIM.