OK I'm and idiot!
We have a 2006 C/C dually 3500 Dmax. I think I might have blown the fuse to the tow package trailer wiring harness. The 12volt aux power for charging up the trailer batteries. When I check the contact at the trailer plug, I am getting 4.6 volts? That's strange why not 12 or 14 volts the same as the truck batteries ? I went all through the owners manual and I swear I can't figure out which fuse it is. Am I the only one that has a problem deciphering the manual? If it had a ryhme or reason to it, I haven't found it. I pulled every fuse under the hood and none were blown. I guess I could start pulling everyone at the drivers side fuse panel also. I always thought the fuses for the trailer supply were in the box under the hood.
The owners manual say's there is a fuse block located under the steering colum under the dash also? But I don't see it.
I don't feel too bad though, it took a GM tech 30 minutes to find one of the door lock fuses that had blown on our 02 dmax, he said it was a new one on him when he finally found it. I figure one of you techs would know right where this one is.
Any input would be appreciated. Thanks.