GMC 2005 T-Series Owner's Manual page 213

Hub-Piloted Type,
8-Hole
Then, follow the steps below for the wheels you have.
Hub-Piloted Wheels, 8-Hole or 10-Hole
The studs and nuts used with these wheels have
right-hand threads.
1. With intermittent pilot pads, position a pad at
12 o'clock to center the wheel and reduce run-out.
2. Put the tire and rim assembly on the axle hub.
Install the outer rear tire and rim assembly so
that its valve stem is exactly opposite the valve stem
on the inner tire and rim assembly.
Hub-Piloted Type,
10-Hole
3. Put on the wheel nuts.
4. Finger-tighten the nuts.
5. Oil the surfaces between the nuts and washers. Do
not oil the studs or the threads of the nut.
6. Tighten the nuts to 400 lb ft (542 Y) if an 8-hole
stud or 480 lb ft (650 Y) if a 10-hole stud, using
the following diagrams.
8-Hole
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