1993 GMC SIERRA Owners Manual

Wheel Replacement
Re'place any' wheel that is bent, cracked or badly rusted. If wheel nuts keep
coming loose, the wheel, wheel bolts, and wheel nuts should be\
replaced.
If
the wheel leaks air out,, replace it (except some aluminum wheels, which can
sometimes be repaired). See your GM dealer
if any of these conditions
exists. Your dealer will know what kind of wheel you need.
Each new wheel should' have the same load carrying capacity, d\
iameter,
width, offset, and be mounted the same way as the one it' replaces.
If you need to replace any of'your wheels, wheel bolts, or wheel nuts,
replace them only with
new GM original equipm-ent parts. This way, you will
be sure to have the right ,wheel, wheel bolts, .and wheel nuts for your vehicle.
1 CAUTION
Using the wrong replacement wheels, wheel bolts or wheel nuts \
on
your vehicle can be dangerous.
It could affect the braking and
handling of your vehicle, make your tires lose air and make you lose
control. You could have an collision in which you or others could be
injured. Always use the correct wheel, wheel bolts, and wheel \
nuts
for redacement.
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NnTICF
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Used Replacement Wheels
* Putting a used wheel on your vehicle is dangerous. You can't know
1 how it's been used or how many miles it's been driven. It could fail
suddenly and cause an accident.
If you have to replace a wheel, use
I a new GM original equipment wheel.
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Service & Appearance Care
Tire Chains
If your vehicle has dual wheels or LT265175R16 size tires, don’t use tire
chains; they can damage your vehicle.
__ you don’t have dual wheels or if you have a tire size other than
LT265/75R16, use tire chains only when you must. Use only
SAE
“S” type chains that are the proper size for your tires. Install \
them on the
tires of the rear axle. 3
Tighten the as tightly as possible with the ends securely fastened. Drive I
slowly and TOIIOW the chain manufacturer’s instructions. If you can hear the
chains contacting your vehicle, stop and retighten them.
If the contact
continues, slow down until
it stops. Driving too fast with chains on will ’
nage your vehicle.
1 CAUTION
Appearance Cam
I
Cleaning products can be hazardous. Some are toxic. Others can \
L burst into flame if you strike a match or get them on a hot part of
the vehicle. Some are dangerous
if you breathe their fumes in a
zlosed space. When you use anything in a container to clean your
vehicle, be sure
to follow the instructions. And always open your
doors or windows when you’re cleaning the inside.
I ter use these to clean your vehicle:
Gasoline
Benzene
Naphtha
Carbon Tetrachloride
Acetone
Paint Thinner
Turpentine
Lacquer Thinner
Nail Polish Remover
They can all be hazardous-some more than others-and they can
all damage your vehicle, too.
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NOTICE I
I Don’t use any of these unless anual says you can. In many uses,
!v will damage your vehicle:
Reducing Agents
Cleaning the Inside of Your Vehicle
Use a vacuum cleaner often to get rid of dust and loose dirt. Wipe vinyl with
a clean, damp cloth.
Your GM dealer has two
GM cleaners-a solvent-type spot lifter and a
foam-type powdered cleaner. They will clean normal spots and st\
ains very
well.
Here are some cleaning tips:
Always read the instructions on the cleaner label.
Clean up stains as soon as you can-before they set.
Use a clean cloth or sponge, and change to a clean area often. A soft
Use solvent-type cleaners in a well ventilated area only. If you use them,
brush
may be used
if stains are stubborn.
don’t saturate the stained area.
If a ring forms after spot cleaning, clean the entire area immedi\
ately or it
will set.
Using Foam-Type Cleaner on Fabric
Vacuum and brush the area to remove any loose dirt.
Always clean a whole trim panel or section. Mask surrounding t\
rim along
stitch or welt lines.
Mix Multi-Purpose Powdered Cleaner following the directions on the
container label.
Use suds only and apply with a clean sponge.
Don’t saturate the material.
Don’t rub it roughly.
As soon as you’ve cleaned the section, use a sponge to remove the
suds.
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Service & Appearance Care
Rinse the section with a clean, wet sponge.
Wipe off what’s left with a slightly damp paper towel or cloth.
Then dry it immediately with an air hose, a hair dryer or a heat lamp.
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careful with a hair dryer or heat lamp. You could scorch me lauric.
Wipe with a clean cloth.
Using Solvent-Type Cleaner on Fabric
First, see if you have to use solvent-type cleaner at all. Some spots and
stains will clean
off better with just water and mild soap.
If you need to use it, then:
Gently scrape excess soil from the trim material with a clean,\
dull knife
or scraper. Use very little cleaner, light pressure and clean cloths
(preferably cheesecloth). Cleaning should start at the outside \
of the stain,
“feathering” toward the center. Keep changing to a clean section of the
cloth.
When you clean a stain from fabric, immediately dry the area with an
air hose, hair dryer,
or heat lamp to help prevent a cleaning ring. (See
previous NOTICE.)
Fabric Protection
Your vehicle has upholstery that has been treated with ScotchgardTM \
Fabric
Protector, a
3M product. ScotchgardTM protects fabrics by repelling oil and
water, which are the carriers of most stains. Even with this protection, you
still need to clean your upholstery often
to keep it looking new.
Further information on cleaning is available by calling 1-800-433-3296
(in
Minnesota, 1-800-642-61 67).
Special Cleaning Problems
Greasy or Oily Stains: Like grease, oil, butter, margarine, shoe polish, coffee
with cream, chewing gum, cosmetic creams, vegetable oils, wax c\
rayon, tar
and asphalt.
Carefully scrape off excess stain.
Then follow the solvent-type instructions above.
Shoe polish, wax crayon, tar and asphalt will stain if left on a vehicle
seat fabric. They should be removed as soon as possible. Be c\
areful,
because the cleaner will dissolve them and may cause them to bleed.
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Non-Greasy Stains: Like catsup, coffee (black), egg, fruit, fruit juice, milk,
soft drinks, wine, vomit, urine and blood.
Carefully scrape off excess stain, then sponge the place with \
cool water.
If a stain remains, follow the foam-type instructions above.
If an odor lingers after cleaning vomit or urine, treat the area with a
watedbaking soda solution:
1 teaspoon (5 ml) of baking soda to 1 cup
(250 ml) of lukewarm water.
Finally, if needed, clean lightly with solvent-type cleaner.
Combination Stains: Like candy, ice cream, mayonnaise, chili sauce and
unknown stains.
to dry.
Carefully scrape off excess stain, then clean with cool water \
and allow
If a stain remains, clean it with solvent-type cleaner,
Cleaning Vinyl or Leather
Just use warm water and a clean cloth.
Rub with a clean, damp cloth to remove dirt. You may have to do it
more than once.
Things like tar, asphalt and shoe polish will stain if you don’t get them
off quickly. Use a clean cloth and solvent-type vinylheather cl\
eaner.
Cleaning the Top of the Instrument Panel
Use only mild soap and water to clean the top surfaces of the instrument
panel. Sprays containing silicones or waxes may cause annoying \
reflections in
the windshield and even make
it difficult to see through the windshield under
certain conditions.
Care of Safety Belts
Keep belts clean and dry.
A
Do not bleach or dye safety belts. If you do, it may severely weaken
them. In a crash they might not be able to provide adequate protection. Clean safety belts only with mild soap and lukewarm\

water.
I
Glass
Glass should be cleaned often. GM Glass Cleaner (GM Part No. 1050427) or
a liquid household glass cleaner
will remove normal tobacco smoke and dust
films.
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Service & Appearance Care
Don’t use abrasive cleaners on glass, because they may cause\
scratches.
Avoid placing decals on the inside rear window, since they may\
have to be
scraped
off later. If abrasive cleaners are used on the inside of the rear
window, an electric defogger element may be damaged. Any tempor\
ary
license should not be attached across the defogger grid.
Cleaning the Outside of the Windshield and Wiper Blades
If the windshield is not clear
blade chatters when running,
windshield.
Clean the outside windshield
(GM Part No. 1050011). The
you rinse it with water. after using the windshield washer, or
if the wiper
wax or other material may be on the blade or
with
GM Windshield Cleaner, Bon-Ami Powder@
windshield is clean
if beads do not form when
Clean the blade by wiping vigorously with a cloth soaked
in full strength
washer solvent. Then rinse the blade with water.
Wiper blades should be checked on a regular basis and replaced\
when worn.
Cleaning the Outside of Your Vehicle
The paint finish on your vehicle provides beauty, depth of color, gloss
retention and durability.
Washing Your Vehicle
The best way to preserve your vehicle’s finish is to keep it clean by washing
it often with lukewarm or cold water.
Don’t wash your vehicle in the direct rays of the sun. Don’t use strong soaps
or chemical detergents. Use liquid hand, dish or car washing (\
non-detergent)
soaps. Don’t use cleaning agents that contain acid or abrasi\
ves.
All cleaning
agents should be flushed promptly and not allowed to dry on the surface, or
they could stain.
Dry the finish with a soft, clean chamois or a 100% cotton
towel to avoid surface scratches and water spotting.
High pressure vehicle washes may cause water to enter your veh\
icle.
Finish Care
Occasional waxing or mild polishing of your vehicle may be necessary to
remove residue from the paint finish. You can get
GM approved cleaning
products from your dealer. (See “Appearance Care and Materia\
ls’’ in the Index,)
Your vehicle (except
C 3500 HD) has a “basecoat/clearcoat” paint finish The
clearcoat gives more depth and gloss to the colored basecoat.
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r Machine compounding or aggressive polishing on a basecoatlclearcoat
paint finish may
dull the finish or leave swirl marks.
Protecting Exterior Bright Metal Parts
Bright metal parts should be cleaned regularly to keep their luster. Washing
with water is all that is usually needed. However, you may use GM Chrome.
Polish on chrome or stainless steel trim,
if necessary.
Use special care with aluminum trim.
To avoid damaging protective trim, never
use auto or chrome polish, steam or caustic soap to clean aluminum.
A
coating of wax, rubbed to a high polish, is recommended for all bright metal
parts.
Aluminum Wheels (If So Equipped)
Your aluminum wheels have a protective coating similar to the painted surface
of your vehicle. Don’t use strong soaps, chemicals, chrome polish,
or other
abrasive cleaners on them because you could damage this coating. After
rinsing thoroughly, a wax may be applied.
1 NOTICE
If you have aluminum wheels, don’t use an automatic vehicle wash that
has hard silicon carbide cleaning brushes. These brushes can take
off the
I protective coating.
White Side wall Tires
Your General Motors dealer has a GM White Sidewall Tire Cleaner. You can
use a stiff brush with it.
Weatherstrips
These are places where glass or metal meets rubber. Silicone g\
rease there
will make them last longer, seal better, and not stick
or squeak. Apply silicone
grease with a clean cloth at least every six months.
Sheet Metal Damage
If your vehicle is damaged and requires sheet metal repair or replacement,
make sure the body repair shop applies anti-corrosion material \
to the parts repaired or replaced to restore corrosion protection.
Foreign Material
Calcium chloride and other salts, ice melting agents, road oil and tar, tree
sap, bird droppings, chemicals from industrial chimneys, and other foreign \
matter can damage your vehicle’s finish
if they remain on painted surfaces.
Use cleaners that are marked safe for painted surfaces for these stains.
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Service & Appearance Care
Finish Damage
Any stone chips, fractures or deep scratches in the finish should be repaired
right away. Bare metal will corrode quickly and may develop into a major
repair expense.
Minor chips and scratches can be repaired with touch-up materia\
ls available
from your dealer or other service outlets. Larger areas of finish damage can
be corrected
in your dealer’s body and paint shop.
Underbody Maintenance
Chemicals used for ice and snow removal and dust control can \
collect on the
underbody.
If these are not removed, accelerated corrosion (rust) can occur \
on the underbody parts such as fuel lines, frame, floor pan, \
and exhaust
system even though they have corrosion protection.
At least every spring, flush these materials from the underbody wi\
th plain
water. Clean any areas where mud and other debris can collect.\
Dirt packed
in closed areas of the frame should be loosened before being flushed. Your
dealer or an underbody washing system can do this for you.
Chemical Paint Spotting
Some weather and atmospheric conditions can create a chemical fallout.
Airborne pollutants fall upon and attack painted surfaces on yo\
ur vehicle. This
damage
can take two forms: blotchy, ringiet-shaped discolorations, and small\

irregular dark spots etched into the paint surface.
Although no defect in the paint job causes this, General Motors will repair, at
no charge to the owner, the surfaces of new vehicles damaged by this fallout
condition within
12 months or 12,000 miles (20 000 km) of purchase,
whichever comes first. This applies only to materials manufactured and
sold
by General Motors. Bodies, body conversions or equipment not made or sold
by General Motors are not covered.
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