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Diagnostic Aids

WARNING: This page is about a different car, the 2001 GMC Savana, 2001 Chevrolet RV Cutaway, 2001 Chevrolet Cutaway, and 2001 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.

If ignition feed circuit is suspected of being open, inspect for other lights on that circuit not illuminating. An open fuse causes entire cluster to be inoperative. Also, if fuse is open, transmission DTCs set.

Using FREEZE FRAME/FAILURE RECORDS data may aid in locating an intermittent condition. If DTC cannot be duplicated, information included in FREEZE FRAME/FAILURE RECORDS data can be useful in determining how many miles since DTC set. Fail counter and pass counter can also be used to determine how many ignition cycles diagnostic reported a pass or a fail. Operate vehicle within same freeze frame conditions, such as RPM, load, vehicle speed, temperature etc., that were noted. This will isolate when DTC failed.

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