Hi guys,
Usually over at the 73-87 but I had a question about an 05 GMC Sierra. My dad has the truck and is going to try to tow a trailer with a bumper mounted hitch similar to this (
http://www.harborfreight.com/automot...ver-67158.html) might actually be that. Anyway, on the bottom of his step bumper are two nuts welded to the bumper to mount this to. What size bolts are these? What grade bolts should we use, I'm assuming grade 8 or higher.
Thanks!