Diagnostic Instructions
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.
A link to the Diagnostic System Check - Vehicle (without HP2) or Diagnostic System Check - Vehicle (with HP2) is provided here. This procedure should be performed prior to performing other diagnostic procedures, as this prevents misdiagnosis where there are integrated system dependencies.
A link to the Strategy Based Diagnosis is provided here. This provides an overview on how a technician should diagnose a vehicle.
A link to the Diagnostic Procedure Instructions is provided here. This information is an overview of instructions for all 16 categories which may be included in a diagnostic procedure.