Diagnostic Aids

An inoperative fuel module may be the cause of a hot stall/no start condition. Check for power and ground circuit to the fuel module and a complete circuit to the pump from terminal "A". If OK, and the pump does not run for the specified 20 seconds at initial ignition "ON," replace fuel module.

NOTE: Figs. Fig 1-24 below are Courtesy of General Motors Corp.

Fig 1: Chart A-5 Schematic, Fuel Pump Ckt Diagnosis (C, K, R, V, G, P & GP Series) One Fuel Tank

Fig 2: Flow Chart A-5, Fuel Pump Ckt Diagnosis (C, K, R, V, G, P & GP Series) One Fuel Tank

Fig 3: Chart A-5 Schematic, Fuel Pump Ckt Diagnosis (R & V Series) Two Fuel Tanks

Fig 4: Flow Chart A-5, Fuel Pump Ckt Diagnosis (R & V Series) Two Fuel Tanks