Service my 4wd came on on my dash after a guy installed a snow plow on my truck. Could he have s...
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2007 GMC Sierra 3500 HD, 6.6L V8 Diesel Turbo, Visitor, Hagerstown, MD, July 23, 2010, 09:19
The servcie trailer brake system light just came on and i'm not towing anything.
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