I need help my truck is stranded and im having this code how do i fix it please help P1631 Theft Deterrent Fuel Enable Signal Not Correct
its the lb7 i tried what you posted but it still wont start:doh: Which truck is it? I just read that you have a LB7 and LMM
If it's a LMM I think there was a recall to have the truck flashed by a TechII for this issue.