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2004 GMC Yukon XL 1500 Question: battery indicator light is coming on&current battery went dead.

 

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turbogn6, Vincent, AL, April 17, 2012, 19:51
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put in new battery & light is still on & alternator is new. truck runs rough too. any ideas?

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  • Answer #1

    Miles Auto Services (884 Answers) , Richmond, VA - (804) 885-4176
    milesauto April 18, 2012, 05:30
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     Master

    Need to have charging system tested. You either have some sort of wiring connection problem, defective alternator, or its possible the PCM could have failed. Alternator is controlled by the PCM.

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  • Answer #2

    Greg's Orange Auto (14224 Answers) , Orange, CA - (714) 361-9386
    globalhelper April 18, 2012, 06:11
     Master

    do you have pwr at large red wire in the rear of the alt. lets start there.

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