GMC 1982 Light Duty Truck Service Manual page 349

a.
Ball joints and steering linkage need lubric ation
b. Shock a b so rb er loose or bushings worn
c. Worn c o n tr o l arm bushings
Worn tie rod ends
d.
0. Worn or loose wheel bearings
Loose stabilizer bar
f.
O
Loose wheel nuts
h. Spring im properly positio ned
Loose suspension bolts
i.
a. Tire and wheel out o f balance
b. Tire and wheel out o f ro und
Blister or b u m p on tire
c.
d. Im p ro p er shock a b so rb er action
a. Underinflated or overin flated tires
b. Im p r o p e r toe-in
c Wheels out o f balance
.
d. 1 lard Driving
Over loaded vehicle
c.
a. Toe-in incorrect
b. Lxcessive speed on turns
c. Tires im p rope rly inflated
d. Suspensio n arm b e n t or twisted
F ro n t shock a bsorbers defective
a.
b. Worn ball joints
c Wheel bearings incorrectly a dju ste d or worn
.
Wheel and tire ou t o f balance
d.
e. Lxcessive tire or wheel ru n o u t
In sp e c tin g Shock M o u n tin g s
If noisy and/or loose shock mountings are suspected,
place vehicle on hoist that supports wheels and check all
mountings for the following conditions:
(1 ^Vorn or defective grommets
(2J.oose mounting nuts
(3Possible interference condition
(4J3ump stops missing
N O I S E
P ro b a b le Cause
W H E E L T R A M P
E X C E S S I V E
S C U F F E D
C U P P E D
Fig. 3C-6--Front Suspension Diagnosis Chart C
IN F R O N T E N D
a. Lubricate at re c o m m e n d e d intervals
b.
T ighten bolts a n d /o r replace bushings
c. Replace bushings
Replace tie rod ends
d.
e. Adjust or replace wheel bearings
f. Tig hten all stabilizer bar a tta c h m e n ts
g. Tig hten the wheel nuts to prope r torqu e
h. R eposition
I T o rque to specificatio ns or replace
.
a. Balance wheels
b. Replace tire
c. Replace tire
Replace shock absorber
d.
O R U N E V E N T I R E W E A R
a. Inflate tire to p ro p e r re co m m e n d e d pressure
b.
Adjust toe-in
c Balance wheels
.
d. Instruct driver
e. Instruct driver
T I R E S
Adjust toe-in to specifications
a.
b. Advise driver
Inflate tires to p ro p e r re c o m m e n d e d pressure
c.
d. Replace arm
T I R E S
a. Replace shock absorbers
Replace ball jo in ts
b.
c. Adjust or replace wheel bearings
d. Balance wheel and tire
e. C o m p e n s a te for r u n o u t
If no apparent defects are noted in this step but noise
condition still exists when vehicle is bounced up and down,
proceed.
In sp e ctin g Shocks for Leaks a n d
M a n u a lly O p e ra tin g Shocks
This procedure is sub-divided into two general areas,
(1) Inspecting Shocks for Loss of Hydraulic Fluid and (2)
FRONT SUSPENSION
P ro b a b le R e m e d y
3C-7