Voltage Issue
2007 Silverado Classic w/ Duramax
Truck worked fine first 6 months
Startup volts went right to 14v
I was having a problem with a slider hitch locking so the service center connected my truck to a used trailer. They activated 5th wheel front jacks nothing happened, then...
Next morning when I started the truck. Static volts 12.44, after start up 11.8v ( this could stay this low for 5-10 minutes ) nighttime driving with a fully loaded electrical system. Once volts come up now they go to 14.9v. Had batteries load tested, alt tested and even tried a new alt, same deal. I can't find any burnt wires or fuses. This happens only on the first start after sitting overnight, next and subsequent starts are fine until a overnight deal is involved.
Any thoughts would be greatly appreciated.
Thank You