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    "Reduced engine power"

    hey guys. So I'm new here. I have a 2003 with a 5.3 Vin z. It's probably thw best running engine I've ever owned. But is has the dreaded p1516 p0120 p0220 which are all with the tac module throttle body and throttle pedal position. I've replace the tac, throttle body, tps on the pedal...

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