Question about 1993 GMC Suburban

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I have a 1993 GMC 4x4 350 suburban that keeps discharging the battery. I have replaced the alternator and still discharge the battery. I was told that it needed a voltage regulator but can not locate where it goes.

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The voltage regulator is built into the Alternator. Take out the Alternator and have it
tested at your local Auto Parts store (they all do it free). This will tell you if the Alternator
is your problem or if you need to check elsewhere.

Posted on Mar 26, 2011

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Im not sure they are right about that. Most alternators on Gm products have the regulator built in to the alternator. So if you replaced the alternator that shouldnt be the problem. That leaves the usual suspect causes of ghostly battery drain: dome lights, rear cargo lights, maybe an under hood work light. Have you had the battery checked as well? maybe its just having trouble keeping a charge. You dont say how old the battery is. Anyway, not sure about the regulator thing. I ve own a couple of suburbans and their alternators had the internal regulators.

Posted on Mar 26, 2011

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