tow GMC SIERRA 1996 Workshop Manual

Engine Oil (Gasoline Engine)
If your vehicle has a diesel engine, see “Engine Oil
(Diesel Engine)” in the Diesel Engine Supplement.
It’s a good idea to check your engine oil every time you
get fuel. In order to get an accurate reading, the
oil must
be warm and the vehicle must
be on level ground. Turn
off the
engine and give the oil a few minutes to
drain back into the oil pan.
If you don’t, the oil dipstick
might not.show the actual level.
Checking Engine Oil
Pull out the dipstick and clean it with a paper towel or
cloth, then
push it back in all the way. Remove it again,
keeping the tip down, and check the level.
The engine oil dipstick has a yellow ring handle and is
located on the passenger side
of the engine.
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As shown in the chart, SAE 5W-30 is best for your
vehicle. However,
you can use SAE low-30 if it’s going
to be
0°F (-1 8°C) or above. These numbers on an oil
container show its viscosity, or thickness. Do not use
other viscosity oils, such as
SAE 20W-50.
I NOTICE:
Use only engine oil with the American Petroleum
Institute Certified For Gasoline Engines
“Starburst” symbol. Failure to use the
recommended oil can result in engine damage not
covered
by your warranty.
GM Goodwrench@ oil meets all the requirements for
your vehicle.
Engine Oil Additives
Don’t add anything to your oil. Your GM dealer is ready
to advise if you think something should be added.
When to Change Engine Oil
See if any one of these is true for you:
a
a
a
a
a
Most trips are less than 5 to 10 miles (8 to I6 km).
This is particularly important when outside
temperatures are below freezing.
Most trips include extensive idling (such as frequent
driving
in stop-and-go traffic).
You operate your vehicle in dusty areas or
off-road frequently.
You frequently
tow a trailer.
The vehicle is used for delivery service, police, taxi
or other commercial application.
Driving under these conditions causes engine oil to
break down sooner.
If any one of these is true for your
vehicle, then you need
to change your oil and filter
every
3,000 miles (5 000 km) or 3 months -- whichever
occurs first.
If none of them is true, change the oil and filter every
7,500 miles ( 12 500 km) or I2 months -- whichever
occurs first. Driving a vehicle
with a fully warmed
engine under highway conditions causes engine
oil to
break down slower.
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Automatic Transmission Fluid
When to Check a1 C’ -ge
A good time to check your auromarlc transmission fluid
level
is when the engine oil is changed.
Change both the fluid and filter every
50,000 miles
(83 000 km) if the vehicle’s GVWR is over 8,600 or
if the vehicle is mainly driven under one or more of
these conditions:
In heavy city traffic where the outside temperature
regularly reaches
90°F (32°C) or higher.
0 In hilly or mountainous terrain.
0 When doing frequent trailer towing.
Uses such as found in taxi, police or delivery service.
If your vehicle’s GVWR is not over 8,600 and you do
not use your vehicle under any of these conditions, the
fluid and filter
do not require changing.
See “Scheduled Maintenance Services’’
in the Index.
How to Check
Because this operation can be a little difficult, you
may choose to have this done at your GM dealership
Service Department. If
you do it yourself,
be sure to follow all the instructions
here, or
you could get a false reading on the dipstick.
NOTICE:
Too much or too little fluid can damage your
transmission.
Too much can mean that some of
i the fluid could come out and fall on hot engine
~ parts or exhaust system parts, starting a fire. Be
sure to get an accurate reading if you check your
transmission fluid.
Wait at least 30 minutes before checking the
transmission fluid level
if you have been driving:
When outside temperatures are above 90°F (32°C).
0 At high speed for quite a while.
In heavy traffic -- especially in hot weather.
While pulling a trailer.
To get the right reading, the fluid should be at normal
operating temperature, which
is 180°F to 200°F (82°C
to 93°C).
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Checking Transmission Fluid Hot
Get the vehicle warmed up by driving about 15 miles
(24 km) when outside temperatures are above 50°F
(10°C). If it's colder than 50°F (lO"C), drive the
vehicle
in DRIVE (D) until the engine temperature
gage moves and then remains steady for
10 minutes.
Then
follow the hot check procedures.
Checking Transmission Fluid Cold
A cold check is made after the vehicle has been sitting
for eight hours or more with the engine off and is used
only
as a reference. Let the engine run at idle for five
minutes
if outside temperatures are 50°F (10°C) or
more. If it's colder than 50°F (lO"C), you may have to
idle the engine longer. Should
the fluid level be low
during a cold check, you nwst perform a hot check
before adding fluid. This will give you
a more accurate
reading
of the fluid level.
Checking the Fluid Hot or Cold
0 Park your vehicle on a level place. Keep the
engine running.
With the parking brake applied, place the shift lever
in PARK (P).
-,
With your foot on the brake pedal, move the shift
lever through each gear range, pausing for about three
seconds
in each range. Then, position the shift
lever
in PARK (P).
Let the engine run at idle for three minutes or more.
Then, without shutting off the engine, follow these steps:
The red transmission dipstick handle
is located at the
rear
of the engine compartment, on the passenger side.
I. Flip the handle up and then pull out the dipstick and
wipe
it with a clean rag or paper towel.
2. Push it back in all the way, wait three seconds and
then pull
it back out again.
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Rear Axle
When to Chc d Change Lubricant
Refer to the Maintenance Schedule to determine how
often to check the lubricant and when to change
it. See
“Scheduled Maintenance Services”
in the Index.
How to Check Lubricant
If the level is below the bottom of the filler plug hole,
you’ll need to add some lubricant. Add enough lubricant
to raise the level to the bottom
of the filler plug hole.
C3 (3500 HD) Trucks Equipped with
Dana Rear
Axle
Additional rear axle scheduled maintenance is required
on 3500 HD models equipped with Dana rear axles
when they are driven under the following conditions:
Extreme loading (at or near GVWR) or trailer
towing, and:
0 Operation above 45 mph (70 km/h) for extended
periods
of time
Vehicles used
in any of these conditions require the
rear axle lubricant be changed every 30,000 miles
(SO 000 km). Fluid capacity is 4.12 quarts (3.9 L).
What to Use
Refer to the Maintenance Schedule to determine what
kind
of lubricant to use. See “Recommended Fluids and
Lubricants”
in the Index.
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4. Push in gently on
the bulb, turn it
counterclockwise
c
. ..
and remove it from
the socket .
5. Put in a new bulb and, pushing in gently, turn it
clockwise
until it is tight.
6. Put the socket back in the latnp assembly and replace
the lens and lens seal.
indshield Wiper Blade l.Lpldcement
For proper type and length, see "Normal Maintenance
Replacement Parts"
in the Index. To replace the
windshield wiper blade assembly:
1
1. Lift the wiper arm and rotate the blade until it is
facing away
from the windshield.
2. Push the release lever and slide the wipcr asselnbly
toward the driver's side
of the vehicle.
3. Install a new blade by reversing Steps I and 2.
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When It’s Time for New Tires
Rust or dirt on
a wheel, or on the parts to which
it
is fastened, can make- wheel nuts become loose
.after
a time. The wheel could come off and cause
an accident. When you change
a wheel, remove
any rust or dirt from places where the wheel
attaches 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 you
need to, to get all the rust or dirt
off. (See
“Changing a Flat Tire” in the Index.) One
way to tell when it’s
time for new tires is
to
check the treadwear
indicators, which will
appear when your tires have
only
1/16 inch (1.6 mm) or
less
of tread remaining.
Some commercial truck
tires may not have
treadwear indicators.
Its
You need a new tire if any of the following statemen
are true:
0 You’can see the indicators at three or more places
around the tire.
You can see cord or fabric showing through the tire’s
rubber.
0 The tread or sidewall is cracked, cut or snagged deep
enough to show cord or fabric.
0 The tire has a bump, bulge or split.
0 The tire has a puncture, cut or other damage that ,
can’t be repaired well because of the size or location
of the damage.
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Using Foam-Type Cleaner T I ~. ~. .
1. Vacuum and brush the area to remove any loose
dirt.
2. Always clean a whole trim panel or section. Ma *
3. Mix Multi-Purpose Powdered Cleaner following
surrounding
trim along stitch or welt lines.
the directions on the container label.
4. Use suds only and apply with
a clean sponge.
5. Don’t saturate the material.
6. Don’t rub it roughly.
7. As soon as you’ve cleaned the section, use a sponge
to remove the suds.
8. Rinse the section with a clean, wet sponge.
9. Wipe off what’s left with a slightly damp paper
towel or cloth.
10. Then dry it immediately with a blow dryer.
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 a solvent:
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 a blow dryer to help prevent a
cleaning ring.
Fabric Protection
Your vehicle has upholstery and carpet that has been
treated with Scotchgard’” Fabric Protector, a
3M
product. It 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 and
carpet often to keep
it looking new.
11. Wipe with a clean cloth.
Further information
on cleaning is available by calling
1-800-433-3296 (in Minnesota, 1-800-642-61 67).
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Cleaning the Outside of the
Windshield
and Wiper Blades
If the windshield is not clear after using the windshield
washer, or
if the wiper blade chatters when running, wax
or other material may be on the blade or windshield.
Clean the outside
of the windshield with GM Windshield
Cleaner, Bon-Ami Powder@
(GM Part No. 10500 1 I ).
The windshield is clean if beads do not form when you
rinse it with water.
Clean
the blade by wiping vigorously with a cloth
soaked in full-strength windshield washer solvent. Then
rinse the blade with water.
Wiper blades should be checked
on a regular basis and
replaced when worn.
Weatherstrips
Silicone grease on weatherstrips will make them last
longer, seal better, and not stick or squeak. Apply
silicone grease with a clean cloth at least every
six
months. During very cold, damp weather more frequent
application may be required. (See “Recommended
Fluids and Lubricants”
in the Index.)
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 (mild detergent) soaps.
Don’t
use cleaning agents that are petroleum based, or
that contain acid or abrasives. 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 vehicle.
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Aluminum or Chrome Wheels
(If So Equipped)
Keep your wheels clean using a soft clean cloth with
mild soap and water. Rinse with clean water. After
rinsing thoroughly, dry with a soft clean towel. A wax
may then be applied.
The surface of these wheels is similar to the painted
surface
of your vehicle. Don’t use strong soaps,
chemicals, abrasive polishes, abrasive cleaners or
abrasive cleaning brushes
on them because you could
damage
the surface. You may use chrome polish on
chrome wheels, but avoid any painted surface
of the
wheel, and buff
off immediately after application.
Don’t take your vehicle through an automatic
vehicle wash that. has silicon carbide
tire cleaning
brushes. These brushes can also damage
the surface
of these wheels.
Tires
To clean your tires, use a stiff brush with a tire cleaner.
NOTICE:
When applying a tire dressing always take care to
wipe
off any overspray or splash from all painted
surfaces on the body
or wheels of the vehicle.
Petroleum-based products may damage the paint
finish.
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.
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
materials available from
your dealer or other service
outlets. Larger areas
of finish damage can be corrected
in your dealer’s body and paint shop.
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