× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
Re: 99 GMC C6500 tach
Posted to HD/Fleet Forum on 4/26/2006

I have .310vt ac and 14.76vt dc on the R terminal at an idle. Would this indicate that the alternator is bad? I am not at work now but I will shoot you my fax# in the morning. Thanks, Tom Login to read more.