Diagnostic Aids

WARNING: This page is about a different car, the 2003 Pontiac Montana, 2003 Oldsmobile Silhouette, and 2003 Chevrolet Venture. However, it is still accessible from the selected car via links, so may be relevant.

Ask the customer about possible overloading, exceeding the trailer towing limit, or towing in overdrive.
Ensure that the current PCM calibration is correct for the final drive ratio.