Question about 2005 GMC Sierra 2500HD 4WD
Disconnecting the batteries will not mess up the computer the only thing it will do is erase the kam which the computer will relearn within three times of driving, if you are worried about erasing the kam most diesels have more than one battery and they are usually connected so you can replace only one at a time and have no worries if the vehicle only has one battery they do sell power savers that you can plug into your cigarette liter and keep the computer "alive"
Posted on Sep 08, 2009
Testimonial: "thank you so very much. By the way, where do you purchase this "power saver" for the cig lighter?"
Just be sure to change both batteries, having one new and one old will throw the batteries off after awhile one will drain one will over charge making it boil out and killing you new battery faster
Posted on Sep 22, 2009
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Posted on Jan 02, 2017
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