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Re: 2003 GMC 2500 HD 8.1L need help with cruise control wires
The 8.1's in that year were wired like an LS engine, the cruise wires come out of the TAC module, there are three of them. THat said, throwing a harness at that problem is just throwing money at the problem. What all have you replaced? It sounds like its most likley the gas pedal/sensor.
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