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Need wiring diagrams, 99 GMC C8500
Posted to HD/Fleet Forum on 11/11/2009 4 Replies

99 GMC C8500, 3126 Cat and Allison trans. Last 8 XJ515434

Need diagrams for the horn circuit , I assume it has a horn relay, where is it located?

Need diagrams for the wiper motor and switch, connector views would be nice.

Need diagrams for the heater/AC... Login to read more.

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