Diagnostic Aids

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, 2002 Chevrolet RV Cutaway, and 2002 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

Intermittent DTCs P0251, P0370, and P1216 may be caused by air entering the fuel system when fuel levels get below 1/8 of a tank while performing hard acceleration or turning maneuvers. DTCs P0251, P0370, and P1216 may set if the vehicle has run out of fuel. Customer driving habits should be checked to determine if the vehicle has been performing in these manners. If the vehicle has performed in these conditions, bleed the fuel system of all air and test drive vehicle.

If DTC P1216 is set with any of the other DTCs, diagnose those DTCs first. If the vehicle is running close to the DTC setting closure time, the vehicle should be checked during the cold start ups and during hot conditions.

An intermittent may be caused by the following conditions:

Poor connections
Rubbed through wire insulation
Broken wire inside the insulation