Diagnostic Starting Point - Engine Mechanical

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Begin the system diagnosis by reviewing the Disassembled Views , Engine Content Specifications , Engine Component Description , Lubrication Description (RPO LY2) or Lubrication Description (RPO LC9/LY5/LMG) or Lubrication Description (RPO LY6) or Lubrication Description (RPO L76) or Lubrication Description (RPO L92) , Camshaft Position Actuator and Solenoid Valve Description , and Cylinder Deactivation (Active Fuel Management) System Description . Reviewing the description and operation information helps you determine the correct symptom diagnostic procedure when a malfunction exists. Reviewing the description and operation information also helps you determine if the condition described by the customer is normal operation. Refer to Symptoms - Engine Mechanical in order to identify the correct procedure for diagnosing the system and where the procedure is located.