Circuit/System Testing
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, inspect the camshaft position sensor for looseness and correct installation.
- If the camshaft position sensor is loose, inspect the sensor and the O-ring for damage, and replace as necessary.
- Inspect the engine for the following conditions:
- Engine oil for debris
- Camshaft reluctor wheel for damage
- The timing chain, timing chain tensioner, and sprockets for wear or damage
- If debris is found in the engine oil, inspect the internal engine components to determine the cause. Repair or replace any worn or damaged components.