Circuit/System Verification
WARNING: This page is about a different car, the 2008 Saturn Outlook, 2008 GMC Acadia, and 2008 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
- Repair any brake system related symptoms and DTCs before performing this diagnostic.
- Electromagnetic interference (EMI) on the speed sensor signal circuit may cause erratic cruise control operation.
Ignition ON, rotate the steering wheel to both steering stops and observe the scan tool Cruise Control Switch parameter in the BCM while pressing the various cruise control switches. The reading should match accordingly with each depressed switch.