Diagnostic Instructions

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.

A link to the Diagnostic System Check - Vehicle 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 instructional overview of all categories which may be included in a diagnostic procedure.