Bolt pattern for a 1985 GMC Sierra Classic 1500 is 6x5.5 (That is what mine is)
6x5.5
6x5.5
six on 5.5 chipc@kovach.net
the bolt pattern is the same 5 x 5.5 but the wheel studs on the 2007 are twice the size.
5X5.55X5.5
The 1500 is 5 on 5.5 inch
4.52" backspacing -12mm offset 16X7 6 on 139mm bolt pattern
2wd is 5 x 127mm and 4wd is 6 x 139.7mm
no i don't think so must hummers have an 8 lug bolt pattern. Chevy 1500 has a 6 lug bolt pattern
6x137.5
6x5.5