GMC SIERRA 1993 Owners Manual

I CAUTION
Sust or dirt on the wheel, or on the parts to which it is fastened,
could come
off and cause an accident. When you change a wheel,
remove any rust or dirt from the places where the wheel attac\
hes to
the vehicle. In an emergency, you can use a cloth or a paper towel
to
do this; but be sure to use a scraper or wire brush later- if vou
need to, to get all the rust or dirt
off.
A :an make the wheel nuts become loose after a time. The wheel
Remove any rust
or dirt from the wheel bolts, mounting surfaces or spare
wheel. Place the spare on the wheel mounting surface.
1 CAUTION I
Never use oil or grease on studs or nuts. If you do, the nuts migh
come loose. Your wheel could fall
off, causing a serious accident.
K2530
Replace the wheel nuts with the rounded end of the nuts toward the wheel.
Tighten each wheel nut by hand until the wheel is held against the hub.
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PmMems on the Road
,. 8' ' I. - i: T ,.I - .. Front Rear
PO500
Lower the vehicle by rotating the ratchet counterclockwise. Lower the \
jack
completely.
r
K2546
Tighten the nuts firmly in a criss-cross sequence as shown. Rotate the ratchet
clockwise with the
UP marking facing you.
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Incorrect wheel nuts or improperly tightened wheel nuts can cau\
se
the wheel to become loose and even come
off. This could lead to
i accident. Be sure to use the correct wheel nuts. If you have to
Stop somewhere as soon as you can and have tht; wts tightened
vvith a torque wrench to the proper torque.
. lace them, be sure to get the right kind. mGe+ . p+p+<.:,
For proper torque, see “Wheel Nut Torque” in the Index.
Put the wheel trim back on. For vehicles with plastic nut cap\
s, tighten the
caps until they are finger tight, then tighten them an additio\
nal one-half turn
with the ratchet. Remove any wheel
blocks.
ring a jack, a tire or other equipment in the passenger - I.
compartment of the vehicle cnvld cause injuy In a sudden stnn OW 4s
in collision, loose equipment
the proper place.
-
Storing the Jack and Tire
Storing Tire in Underbody Carrier
UNDERBODY SPARE TIRE MOUNTING
HOIST
CABLE
RETAINER
& RATCHET
=r/49q “UP/DOWN” MARKING
WHEEL WRENCH

SHAFT (CHISEL END)
TIRE
a>
SPARE VALVE STEM
(POINTED DOWN)
PB009
Put the tire on the ground at the rear of the vehicle, with the valve stem
pointed down.
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Pzloblenrs on the Road
Pull the retainer through the wheel center. Attach the ratchet,\
with the UP
side facing you, to the wheel wrench. Put the chisel end of the wheel wrench
into the hole in the rear bumper. Turn the ratchet until the tire is raised
against the underside
of the vehicle.
You will hear
two “clicks” when the tire is secure, but pull on the tire to
make sure.
Return the jack, ratchet, wheel wrench and jack extensions to their location
behind the passenger’s seat. Secure the items and replace th\
e jack cover
if
there is one.
Storing Tire ln Pickup Bed
K2534
1. Place the bolt through the bottom wheel nut hole. Be sure the valve
2. Place the nut on the bolt and turn it clockwise until the ti\
re is secure.
faces out.
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If You’re Stuck: In Sand,
Mud,
Ice or Snow
What you don’t want to do when your vehicle is stuck is to spin your
wheels. The method known as “rocking” can help you get o\
ut when you’re
stuck, but you must use caution.
CAUTION - --
I * If you let your tires spin at high speed, they can explode and you or
,A others could be injured. And, the transmission or other parts of the
vehicle can overheat. That could cause an engine compartment fire
or other damage. When you’re stuck, spin the wheels as little as
possible. Don’t spin the wheels above
35 mph (55 krnlh) as shown
I on the speedometer.
;pinning your wheels can destroy parts of your vehicle as well as the
res.
If you spin the wheels too fast while shifting your transmission back
.nd forth, you can destroy your transmission.
NOTICE 1
Rocking your vehicle to get it out:
First, turn your steering wheel left and right. That will clear the area around
your front wheels. Then shift back and forth between
R and a forward gear
(or with a manual transmission, between First or Second gear and Reverse),
spinning the wheels as little as possible. Release the accelerator pedal while
you shift, and press lightly on the accelerator pedal when the transmission is
in gear.
If that doesn’t get you out after a few tries, you may need to be
towed out.
Or, you can use your recovery hooks, if your vehicle has them. If
you do need to be towed out, see “Towing Your Vehicle” in the Index.
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Problents on the Road
Using the Recovery Hooks
.... \"
..
b.
K2456
If you ever get stuck in sand, mud, ice or snow, your vehicle may be equip-
ped with recovery hooks. The recovery hooks are provided at th\
e front of
your vehicle. You may need
to use them if you're stuck off-road and need to
be pulled to some place where you can continue driving.
I / The recovery hooks, when used, are under a lot of force. Always pul
the vehicle straight out. Never pull on the hooks at
a sideways
angle. The hooks could break off and you or others could be \
injured
from the chain or cable snapping back.
I
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K2457
~ NOTICE
Never use the recovery hooks to tow the vehicle. Your vehicle could be
damaged and it would not be covered
by warranty.
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Service & Appearance Care
.....
Here you will find information about the care of your vehicle . This Section
begins with service and fuel information. and then it shows how to check
important fluid and lubricant levels
. There is also technical information about
your vehicle. and a section devoted to its appearance care
.
Service ........................................................................\
........................................... 6-3
Fuel (Gasoline Engines)
........................................................................\
............... 6-4
Diesel Fuel Requirements and Fuel System
...................................................... 6-6
Checking Things Under the Hood
..................................................................... 6-17
Hood Release
........................................................................\
.......................... 6-18
Cleaning Your Diesel Engine
........................................................................\
.. 6-19
Noise Control System
........................................................................\
............. 6-19
Engine Oil (Except Diesel)
........................................................................\
..... 6.20
Engine Oil (Diesel Engines)
........................................................................\
... 6-26
Air Cleaner
........................................................................\
............................... 6-31
Automatic Transmission Fluid
........................................................................\
. 6-33
Manual Transmission Fluid
........................................................................\
..... 6-36
Hydraulic Clutch
........................................................................\
....................... 6-37
Transfer Case
........................................................................\
.......................... 6-39
Front Axle ........................................................................\
................................. 6-40
Rear Axle
........................................................................\
................................. 6-41
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Service & Appearance Care
Engine Coolant ........................................................................\
........................ 6-42
Power Steering Fluid
........................................................................\
............... 6-46
Windshield Washer Fluid
........................................................................\
......... 6-48
Brake Master Cylinder
........................................................................\
............. 6-49
Replacing Brake System Parts
........................................................................\
.. 6-50
Other Maintenance Items ........................................................................\
........... 6-51
Lubrication
........................................................................\
.................................... 6-52
Electrical System
........................................................................\
......................... 6-54
Battery
........................................................................\
...................................... 6-54
Fuses and Circuit Breakers
........................................................................\
.... 6-64
Bulb Replacement
........................................................................\
.................... 6-54
Exhaust System
........................................................................\
........................... 6-65
Loading Your Vehicle
........................................................................\
.................. 6-67
Tires
........................................................................\
.............................................. 6-72
Inflation-Tire Pressure
........................................................................\
........... 6-73
Tire Inspection and Rotation
........................................................................\
.. 6-78
When It's Time for New Tires
........................................................................\
6-80
Buying New Tires
........................................................................\
.................... 6-81
Wheel Alignment and Tire Balance
............................................................... 6-82
Wheel Replacement
........................................................................\
................. 6-83
Tire Chains
........................................................................\
............................... 6-84
Appearance Care
........................................................................\
........................ 6-84
Cleaning the Inside Of Your Vehicle
............................................................. 6-85
Cleaning the Outside Of Your Vehicle
.......................................................... 6-88
Appearance Care Materials
.r.ikl...rr.r.n.....lr. ........ ... .. 6-91
Vehicle Identification Number
........................................................................\
..... 6-92
Service Parts Identification Label
...................................................................... 6-94
Specification Charts
....++t....,.,.*,..-".,,. .............. , ........... .................... 6-95
Uniform Tire Quality Grading
........................................................................\
.. 6-81
..................................................
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