GMC 1982 Light Duty Truck Service Manual page 344

3C-2 FRONT SUSPENSION
The C-G-P Series trucks incorporate an independent
coil spring front suspension system, as shown in Figures 3C-
1 and 3C-2. The control arms are of unequal length (S.L.A.
Type).
This suspension system consists of upper and lower
control arms pivoting on steel threaded or rubber bushings
on upper and lower control arm shafts. The lower control
arms are attached to the crossmember. The upper control
arms are attached to a frame bracket. These control arms
are connected to the steering knuckle through pivoting ball
joints.
A coil spring is located between the lower control arm
and a formed seat in the suspension crossmember, thus the
lower control arm is the load carrying member. Double
acting shock absorbers are also attached to the lower control
arms and connect with the frame to the rear on the upper
end. The front wheel bearings are tapered roller type and
are used on all models.
GENERAL DESCRIPTION
C-G-P Series
F ig . 3 C - l~ F r o n t S u s p e n s io n , C-P S eries