Circuit/System Testing

WARNING: This page is about a different car, the 2011 GMC Yukon, 2011 Chevrolet Tahoe, and 2011 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

You must perform the Circuit/System Verification before proceeding with Circuit/System Testing.

Inspect the engine front cover area or review the service history of the vehicle for any recent repairs involving the timing chain, the timing chain tensioner, the camshaft, the crankshaft, the camshaft actuator, or the sprockets.
- If recent repairs were made, refer to Timing Chain, Crankshaft Sprocket, Camshaft Position Actuator, and Solenoid Valve Replacement and inspect the timing chain, the timing chain tensioner, and both sprockets for proper timing alignment or indexing.
Remove the engine front cover. Refer to Camshaft Position Actuator Replacement , and inspect the camshaft position actuator for wear or damage. Refer to Camshaft Position Actuator Cleaning and Inspection .
- If any components are worn or damaged, replace as necessary.