LEMON Manuals: Even more car manuals for everyone
Home >> GMC >> 1996 >> C3500 HD 6.5 F, Standard >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel - Gasoline >> Testing >> Fuel Gauge >> (Single Tank)

(Single Tank)

  1. Disconnect IPC connector. Connect fused jumper wire between IPC terminal No. 22 (Pink wire) and voltage. Install another fused jumper wire between IPC terminal No. 16 (Purple wire) and ground. Install fused jumper wire between IPC terminal No. 31 (Black wire) and ground. Turn ignition on. If fuel gauge indicates full, replace IPC. If fuel gauge indicates empty, go to next step.
  2. Remove fused jumper wires from IPC and reconnect connector. Disconnect fuel pump and sender connector. Connect a fused jumper wire between fuel sender connector terminal "B" (Purple wire) and ground. If fuel gauge indicates full, locate and repair open circuit in Purple wire between IPC and fuel gauge sender. If fuel gauge indicates empty, go to next step.
  3. Replace fuel pump and sender. If fuel gauge indicates full, repair open circuit in Black/White wire between fuel sender and ground. If fuel gauge indicates empty, replace fuel gauge sender.


  1. Disconnect fuel pump and sender connector. Turn ignition on. If fuel gauge does not indicate empty, replace fuel pump and sender. If fuel gauge indicates empty, go to next step.
  2. Turn ignition off. Disconnect IPC connector. Connect test light between IPC connector terminal No. 16 (Purple wire) and ground. If test light comes on, repair short to ground in Purple wire between IPC and fuel gauge sender. If test light does not come on, replace IPC.
scientia non olet · About LEMON Manuals