Having problems with your 2004 GMC Sierra ?

Truck broke down wont start.

\015 Ran over a truck tire on the highway.No damage underneath.\015\012Fuses good. Relays good. Fuel pump has great pressure but no power to pump. No engine code. Is there a fuel accident cut off switch?\015\012\015\012Its a 2004 GMC Box truck. Ex penske rental.I think its on a Savana van frame. V8\015 Posted / edited by AnonymousUser on : 16-04-2018

Answers :

There is no Inercia Switch to reset Like Ford
\015\012Have you Double Checked All Underbody wiring for fuel pump ,OPEN In Pink/blk tracer fuel power lead,also
\015\012Oil Sending unit on most GM Vehicles have the ability to turn OFF GROUND to Fuel Pump Relay as a Proyection Against LOW OIL Pressure in engine.
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\015\012Fuel Cutoff Mode
The PCM cuts OFF fuel from the fuel injectors when the following conditions are met in order to protect the powertrain from damage and improve driveability:
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  • The ignition is OFF. This prevents engine run-on. \015\012
  • The ignition is ON but there is no ignition reference signal. This prevents flooding or backfiring. \015\012
  • The engine speed is too high, above red line. \015\012
  • The vehicle speed is too high, above rated tire speed. \015\012
  • During an extended, high speed, closed throttle coast down-This reduces emissions and increases engine braking. \015\012
  • During extended deceleration, in order to prevent damage to the catalytic converters
Repair Help & Product Troubleshooting for 2004 GMC Sierra

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