Question about 2004 GMC Yukon

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2004 gmc yukon gas peddle doesnt work

Car starts and says engine power lowered and there is no power when i hit the gas peddle, is that a fuel pump

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  • washs33 May 11, 2009

    2004 yukon has the check engine light on,

  • Michael Masters
    Michael Masters May 11, 2010

    is your check engine light on?

×

2 Answers

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No,It is called limp mode,It is so that when the vehicle has a major mechanical problem,It can still be driven to the shop.

Posted on May 11, 2009

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  • Master
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OK, this is more serious than the fuel pump. the check engine light is signaling a more serious issue concerning a vital sensor that is malfunctioning at this time. most malfunctioning sensors will trip the check engine light, via ECM(engine control module). the ECM will then change the operational value of the engine performance to compensate for the distress signal it is receiving form the failed or malfunctioning sensor.

The ECM can restrict fuel flow to the injectors in this case by lowering the voltage to the pump or, it can change the ignition timing as well to address a failing knock or crank sensors as well.

The best action now is to take to this truck to the dealership or a local auto zone for a diagnostic run on the ECM module. there will be a code given that will point you or your mechanic to the specific area where there is a major malfunction or failed sensor.

the auto zone diagnostics is free in most cases.

Please rate and god belss:)

Posted on May 11, 2009

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