diagram GMC C-SERIES 1999 Owners Manual

yellowblue
6-53
Then, follow the steps below for the wheels you have.
Cast
-Type Wheel
1. Put the tire and rim assembly on the axle hub.
2. Install the rim spacer at the rear.
3. 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.
4. Install the rim clamps and nuts. Position
them properly.
NOTICE:
If you tighten a nut when a rim clamp is not
positioned properly, it can damage the rim and
also cause the wheel to wobble in operation. Be
sure to position the rim clamps properly before
you go on to the next step.
5. Finger-tighten the nuts. Be sure that all of the wheel
clamps are seated all the way around the wheel.
6. Tighten all of the nuts using the following diagram.
Be sure to use the one that matches your wheels.
7. Now repeat Step 6, but this time tighten the nuts to
200 lb
-ft (271 N´m) of torque.
8. Turn the wheel and measure along the sidewall to see
how much wheel run
-out there is. There should be
no more than 1/8 inch (3 mm) on the front wheels
and 3/16 inch (5 mm) on the rear wheels. If there is
too much wheel run
-out, you can try loosening the
nuts on the side where there is the most run
-out and
tightening the opposite nuts. When you finally have
the tire running true, tighten all of the nuts to
200 lb
-ft (271 N´m).
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6-54
Stud-Piloted 10-Stud Wheel
The studs and nuts used on the right side of the vehicle
have right
-hand threads. Those used on the left side
have left
-hand threads. It is easy to tell by looking at the
nuts, because they are stamped R or L.
1. Put the tire and rim assembly on the axle hub.
2. Put on the wheel nuts. If you use oil or grease on the
wheel studs or nuts, the wheel nuts can't tighten
properly. This could let the wheel come off as you
are driving.
3. Finger
-tighten the nuts on the rear inner wheels and
the front wheels.
4. Tighten these nuts to 575 lb
-ft (780 N´m), unless
you have aluminum wheels and/or aluminum hubs.
If you have aluminum wheels and/or aluminum
hubs, tighten the nuts only to 475 lb
-ft (644 N´m).
Use the following diagram to do this.
Front or Inner Dual
WheelOuter Dual Wheel
5. 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.
6. Put on the wheel nuts.
7. Finger
-tighten the wheel nuts.
8. Tighten the nuts to the same torque numbers shown
in Step 4.
Whenever tightening both the inner and outer rear wheel
nuts, first loosen the outer wheel nuts. Then tighten the
inner nuts. Finally, tighten the outer nuts.
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6-56
6. Tighten the nuts to
400 lb
-ft (542 N´m)
if an eight
-hole stud or
480 lb
-ft (650 N´m)
if a 10
-hole stud, use
the following diagrams.
8
-Hole
10-Hole
(Front or Inner Dual
Wheel)10-Hole
(Outer Dual Wheel)
CAUTION:
If wheel studs are damaged, they can break. If all
the studs on a wheel broke, the wheel could come
off and cause a serious crash. If any stud is
damaged because of a loose
-running wheel, it
could be that all of the studs are damaged. To be
sure, replace all studs on the wheel. If the stud
holes in a wheel have become larger, the wheel
could collapse in operation. Replace any wheel if
its stud holes have become larger or distorted in
any way. Inspect hubs and hub piloted wheels for
damage. Because of loose running wheels,
piloting pad damage may occur and require
replacement of the entire hub, for proper
centering of the wheels.
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