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Diagnostic Aids

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2003 GMC Savana Special, 2003 GMC Savana Camper Special, 2003 GMC Savana, 2003 Chevrolet RV Cutaway, and 2003 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

If the vehicle is equipped with a 6.5L diesel engine do not perform this diagnostic. The exhaust system does not have a location for installing the J 35314-A  . Instead remove the suspect component, operate the vehicle, verify for improved performance. If performance is improved then replace the faulty component.

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