Question about 2007 GMC Sierra Classic Denali

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No power when accelerating

Won't start know wants start but turn over barly

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  • jonah goodno
    jonah goodno May 17, 2014

    starter issues maybe ?

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Have a load test done on the battery to check for dying cells . have a output test done on the alternator to check for correct operation. check condition and tension of drive belt for the alternator

Posted on May 17, 2014

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Posted on Jan 02, 2017

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Throdlebody and gas peddle out of sink won,t go faster than 30


If you would like help we would need the DTC - diagnostic trouble code .Is their a Reduced Engine Power Mode message showing on the instrument cluster ?
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When the PCM detects a problem with the throttle actuator control (TAC) system the PCM enters one of the following Reduced Engine Power Modes:
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