1997 GMC JIMMY change time

Towing a Trailer
If you don’t use the correct equipment and drive
properly, you can lose control when you pull a
trailer. For example, if the trailer
is too heavy, the
brakes may not work well
-- or even at all. You
and your passengers could be seriously in.jured.
Pull a trailer only
if you have followed all the
steps in this section.
Ask your GR/I dealer for
advice and information about towing a trailer with vour vehicle.
I NOTICE:
Pulling a trailer improperly can damage your
vehicle and result in costly repairs not covered
by
your warranty. To pull a trailer correctly, follow
the advice in this part, and see your
GM dealer
for important information about towing
a trailer
with your vehicle.
Every vehicle
is ready for some trailer towing. If yours
was built
with trailering options, as many are. it‘s ready
for heavier trailers.
But trailering is different than just
driving your vehicle by itself. Trailering means changes
in handling, durability and fuel economy. Successful,
safe trailering takes correct equipment, and
it has to be
used properly.
That’s the reason for this part. In
it are many
time-tested, important trailering tips and safety rules.
Many
of these are important for your safety and that of
your passengers.
So please read this section carefully
before you pull a trailer.
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6. Remo\:e any rust or dirt
from the wheel bolts.
mounting surfr~ces and
spare wheel.
Rust or dirt on the wheel, or on the parts to
which it
is fastened, can make the 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 the 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.
1
Never use oil or grease on studs or nuts. If you
do, the nuts might come loose. Your wheel could
fall off, causing a serious accident.
8. Put the nuts on by
hand. Make SLIK the
cone-shaped end
is
toward the wheel.
Tighten
each nut by
hand until the wheel is
held against the hub.
If ;I nut can't be turned
by hand.
LIS~ the
wheel
wrench and see
your dealer
as soon
as possible.
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Automatic Transmission Fluid
Operating the engine with the air cleaner off can
cause you or others
to be burned. The air cleaner
not only cleans the air, it stops flame
if the engine
backfires.
If it isn't there, and the engine
backfires, you could be burned. Don't drive with
it
off, and be careful working on the engine with
the air cleaner
off.
I NOTICE:
If the air cleaner is off, a backfire can cause a
damaging engine fire. And, dirt can easily get
into your engine, which
will damage it. Always
have the air cleaner
in place when you're driving.
When to Check and Change
A good time to check your automatic 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 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.
In hilly or mountainous terrain.
When doing frequent trailer towing.
Uses such as found in taxi. police or delivery service.
If 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.
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Manual Transmission Fluid
When to Check
A good time to have it checked is when the engine oil is
changed. However, the fluid in YOLK manual
transmission doesn't require changing.
How to Check
Because this operation can be a little dii'licult, 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
false reading.
NOTICE:
Too much or too little fluid can damage your
transmission.
Too much can mean that some of
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.
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Brake Pedal Travel
See your dealer if the brake pedal does not return to
nor~nal height, or
if there is a rapid increase in pedal
travel.
This could be a sign of brake trouble.
Brake Adjustment
Every time you make a brake stop, your disc brakes
adjust for wear.
If your brake pedal goes down farther than normal. your
rear drum brakes may need adjustment. Adjust them
by
backing up and firmly app1yin.g the brakes a lew times.
Replacing Brake System Parts
The braking system on a modern vehicle is complex. Its
many parts have to be of top quality and work well
together
if the vehicle is to have really good braking.
Your vehicle was designed and tested
with top-quality
GM brake parts. When
you replace parts of your braking system
-- for
example, when your brake linings wear down and you
haw to have new ones
put in -- be sure you get new
approved
GM replacement parts. If you don’t, your
brakes may
no longer work properly. For example, if
someone puts in brake linings that are wrong for your
vehicle, the balance between
your front and rear brakes
can change
-- for the worse. The braking performance
you’ve come to expect can change
in many other ways if
someone puts in the wrong replacement brake parts.
Battery
Every new vehicle has a Delco Freedom@ battery. You
never have to add water to one of these. When it’s time
for a new battery, we recomlnend a Delco Freedom
battery. Get one that has the replacement number shown
on the original battery‘s label.
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I1
If your vehicle has a compact spare tire, don’t include it
in your tire rotation.
After the tires have been rotated, adjust the front and
rear inflation pressures as shown on the
Certificatioflire label. Make certain that all wheel nuts
are properly tightened. See “Wheel Nut Torque’’ in
the Index.
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.)
6-43

Capacities and Specifications
Engine Description ............ “VORTEC” 4300
Type .................................... V6
VINCode ................................. W
Firing Order ...................... 1-6-5-4-3-2
Horsepower
................... 190 at 4,400 rpm
Thermostat Specification ........... I95 OF (9 I “C)
Spark Plug Gap .......... 0.045 inches (0. I 14 cm)
Wheels and Tires
Wheel Nut Torque ............ 95 lb-ft ( 130 N-m)
Tire Pressure ...... See the Certification/Tire label.
See ”Loading Your
Vehicle”
in the Index.
Normal Maintenance Replacement Parts
Replacement part numbers listed in this section are
based on the latest information available at the time
of
printing, and are subject to change. If a part listed in this
manual is not the same
as the part used in your vehicle
when
it was built, or if you have any questions, please
contact your
GM truck dealer.
Thermostat
......................... 12551472
Oil Filter.. ............................. PF52
Air Cleaner Filter
...................... A 1 163C
PCV Valve
.......................... CV746C
Automatic Transmission Filter
Kit ...... 24200796
Spark Plugs
........................... 4 1-932
Fuel Filter. ............................ GF481
Front Windshield
Wiper Blade
.......... Trico (20 inchedS0.8 cm)
Backglass Wiper Blade
... Trico (14 inched35.6 cm)
6-63

Short Trip/City Maintenance Schedule
The services shown in this schedule LIP to 100.000 miles
( I66 000 km) should be performed after 100,000 miles
( 166 000 km) at the same intervals. The services shown
at 150.000 miles (240
000 km) should be performed at
the
same interval after 150.000 miles (240 000 km).
See "Owner Checks and Services" and "Periodic
Maintenance Inspections" following.
Footnotes
-f The U.S. Environmental Protection Agency or the
California Air Resources Board has determined that the
failure to perform this maintenance item will not
nullify
the emission warranty or limit recall liability prior to the
completion
of the vehicle's useful life. We. however,
urge that
all recommended maintenance services be
performed at the indicated intervals and
the maintenance
be recorded.
## Lubricate the front suspension. ball joints. steering
linkage and transfer case shift linkage. parking brake
cable guides, propshaft splines. Lulivel-sal joints and
brake
pedal springs.
+ A good time to check your brakes is during tire
rotation. See "Brake System Inspection" under "Periodic
Maintenance Inspection"
in Part C of this schedule.
'i::k Drive axle service (see "Recommended Fluids and
Lubricants"
in the Index for proper lubricant to use):
0
0
0
Locking Differential -- Drain fluid and refill at first
engine oil change. At subsequent oil changes, check
fluid level and add fluid as needed.
If driving in
dusty areas or towing a trailer, drain tluid and refil
every 15,000 miles
(25 000 km).
Standard Differential
-- Check fluid level and add
tluid
as needed at every oil change. If driving in
dusty areas or towing a trailer, drain fluid and refil
every
15,000 miles (25 000 km).
More frequent lubrication may be required
for
heavy-duty or off-road use.
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