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 : 22-01-2018

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.
\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:
  • 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
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