Circuit/System Testing
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF. inspect the CMP sensor for correct installation.
- If the CMP 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
- Repair or replace any worn or damaged components. Refer to Camshaft Timing Chain and Sprocket Cleaning and Inspection .