Batteries NOT charging while towing
Did a search and saw some good info about batteries charging/not charging while towing...but here's a situation some may not know about - I didn't, and I've towed for nearly 6 yrs with my 2008 2500 D/...
Forum Discussion
S3, these General Motors trucks have a fuse/relay that is the underhood fuse box, that is required to charge the batteries while hooked up. Mine had it installed as part of the towing package with the harness. Some trucks in the club have been delivered without them. Take a look at it from that point-of-view.
