1998 CHEVROLET BLAZER ECU

Downloaded from www.Manualslib.com manuals search engine Driving with a Trailer
I
A GA ‘TION:
If you have a rear-most window open and you
pull a trailer with your vehicle, carbon monoxide
(CO) could come into your vehicle. You can’t see
or smell
CO. It can cause unconsciousness or
death. (See “Engine Exhaust” in the Index.) To
maximize your safety when towing
a trailer:
0 Have your exhaust system inspected for
leaks, and make necessary repairs before
starting on your trip.
Keep the rear-most windows closed.
0 If exhaust does come into your vehicle
through a window in the rear or another
opening, drive with your front, main
heating or cooling system on and with the
fan
on any speed. This will bring fresh,
outside air into your vehicle.
Do not use
MAX AfC because it only recirculates the
air inside your vehicle. (See “Comfort
Controls” in the Index.) Towing a
trailer requires
a certain amount of experience.
Before setting out for the open road, you’ll want to get
to know your rig. Acquaint yourself with the
feel of
handling and braking with the added weight of the
trailer. And always keep in mind that the vehicle you
are driving is now a
good deal longer and not nearly as
responsive as your vehicle is by itself.
Before
you start, check the trailer hitch and platform
(and attachments), safety chains, electrical connector,
lamps, tires and mirror adjustment.
If the trailer has
electric brakes, start your vehicle and trailer moving and
then apply the trailer brake controller by hand to be sure
the brakes are working. This lets you check your
electrical connection at the same time.
During your trip, check occasionally to be sure that the
load
is secure, and that the lamps and any trailer brakes
are still working.
Following Distance
Stay at least twice as far behind the vehicle ahead as you
would when driving your vehicle without a trailer. This
can help you avoid situations that require heavy braking
and sudden turns.
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Downloaded from www.Manualslib.com manuals search engine 2. Let up on the brake pedal.
3. Drive slowly until the trailer is clear of the chocks.
4. Stop and have someone pick up and store the chocks.
Maintenance When Trailer Towing
Your vehicle will need service more often when you’re
pulling
a trailer. See the Maintenance Schedule for more
on this. Things that are especially important
in trailer
operation are automatic transmission fluid (don’t
overfill), engine oil, axle lubricant, belt, cooling system
and brake adjustment. Each
of these is covered in this
manual, and the Index will help
you find them quickly.
If
you’re trailering, it’s a good idea to review these
sections before you start your trip.
Check periodically to see that all hitch nuts and bolts
are tight.
Trailer Wiring H-T--- ess
The light duty trailer wir is a six-wire harness
assembly. The optional heavy-duty trailer wiring
is an
eight-wire harness assembly. The harnesses are stored under the vehicle, along the passenger-side frame
crossmember on two-door vehicles or on the driver’s side
corner frame rear crossmember on four-door vehicles. The
heavy-duty trailer wiring has a 30-amp feed wire with
an
inline fuse located by the junction block. See
“Fuses and Circuit Breakers” in the Index. Both
harnesses have
no connector and should be wired by a
qualified electrical technician. The technician
can use
the following color code chart when connecting the
wiring harness to your trailer.
0
0
0
0
0
0
0
0
Dark Blue: Use for electric trailer brakes or
auxiliary wiring.
Red: Use for battery charging; it connects to the
starter solenoid (eight-wire harness only).
Light Green: Back-up lamps (eight-wire
harness only).
Brown: Taillamps and parking lamps. Yellow: Left stoplamp and turn signal.
Dark Green: Right stoplamp and turn signal.
White (Heavy Gage): Ground wire.
White (Light Gage): Auxiliary stoplamp.
Securely attach the harness to the trailer, then tape or
strap
it to your vehicle’s frame rail. Be sure you leave
it loose enough
so the wiring doesn’t bend or break,
but not
so loose that it drags on the ground. Store the
harness in its original place. Wrap the harness together
and tie it neatly
so it won’t be damaged.

Downloaded from www.Manualslib.com manuals search engine I
’ A CAUTION:
To help avoid injury to you or others:
0 Never let passengers ride in a vehicle that is
Never tow faster than safe or posted speeds.
Never tow with damaged parts not fdy secured.
0 Never get under your vehicle after it has
Always use separate safety chains on each
0 Never use J-hooks. Use T-hooks instead. being towed.
been lifted
by the tow truck.
side when towing
a vehicle.
A vehicle can fall from a car carrier if it isn’t
adequately secured. This can cause
a collision,
serious personal injury and vehicle damage. The
vehicle should be tightly secured with chains or
steel cables before it is transported.
Don’t use substitutes (ropes, leather straps,
canvas webbing, etc.) that can be cut by sharp
edges underneath the towed vehicle. Always use
T-hooks inserted in the T-hook slots. Never use
J-hooks. They will damage drivetrain and
suspension components.
1
5-8

Downloaded from www.Manualslib.com manuals search engine Follow this diagram to store the underbody-mounted
spare.
A. Retainer
B. Valve Stem (Pointec
C. Spare or Flat Tire
D. Spring
E. Wheel Wrench
F. Lower
G. Raise
H. Hoist Arm
i Down)
1. Put the tire on the ground at the rear of the vehicle,
with the valve stem pointed down and
to the rear.
2. Pull the retainer through the wheel.
3. Put the chisel end of the wheel wrench, on an angle,
through the hole in the rear bumper and into the hoist
shaft. Turn the wheel wrench
to the right 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.
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Downloaded from www.Manualslib.com manuals search engine Reinstall the locking wheel nut using the wheel wrench.
Then push the lock case onto the lug nut until it stops.
The key does not have to be inserted into the lock. Push
the lock case
to be sure it is secured. The special lug nut
and lock case
is not intended to be used on any road
wheel, only
on the spare wheel carrier. Tighten the nuts
on the wheel carrier to
22 to 32 lb-ft (30 to 40 Nem).
Return the jack, wheel wrench and wheel blocks to the
proper location in your vehicle’s rear area. Secure the
items and replace the jack cover.
/-A
A. Retainer
B. Rubber Band (Some Models)
C. Work Gloves
D. Mat
E. Jack Storage Cover
E Wheel Blocks
G. Hub Cap Removal Tool (Some Models)
H. Wheel Wrench
I. Jack
J. Jacking Instructions
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Downloaded from www.Manualslib.com manuals search engine ’ CAUTION:
Make sure the tire and carrier are secure.
Driving with the tire or carrier unlatched could
injure pedestrians or damage the vehicle.
Compact Spare Tire (If Equipped)
Although the compact spare tire was fully inflated when
your vehicle was new, it can lose air after a time. Check
the inflation pressure regularly. It should be
60 psi
(420 kPa).
After installing the compact spare on your vehicle,
you should stop as soon as possible and make sure
your spare tire
is correctly inflated. The compact
spare
is made to perform well at speeds up to 65 mph
(105 Wh) for distances up to 3,000 miles (5 000 km),
so you can finish your trip and have your full-size tire
repaired or replaced where
you want. Of course, it’s besf
to replace your spare with a full-size tire as soon as you
can. Your spare will last longer and be in good shape in
case you need it again.
NOTICE:
When the compact spare is installed, don’t take
your vehicle through an automatic car wash with
guide rails. The compact spare can get caught on
the rails. That can damage
the tire and wheel,
and maybe other parts
of your vehicle.
Don’t use your compact spare on other vehicles.
And don’t mix your compact spare tire or wheel with
other wheels or tires. They won’t fit. Keep your spare
tire and its wheel together.
NOTICE:
Tire chains won’t fit your compact spare. Using
them can damage your vehicle and can damage
the chains too. Don’t use tire chains on your
compact spare.
5-34

Downloaded from www.Manualslib.com manuals search engine Remote Oil Filter (Four-wheel Drive) Air Cleaner
The access door for the remote oil filter is in the steering
linkage shield assembly located under the radiator
support. Twist the screw to unlock or lock the door.
If you open the door, make sure it is securely closed
when you are finished.
What to Do with Used Oil
Did you know that used engine oil contains certain
elements that may be unhealthy for your skin and could
even cause cancer? Don’t let used oil stay on your skin
for very long. Clean your skin and nails with soap and
water, or a good hand cleaner. Wash or properly throw
away clothing or rags containing used engine oil. (See
the manufacturer’s warnings about the use and disposal
of oil products.)
Used oil can be a real threat to the environment. If you To
remove the air cleaner, remove the wing nuts that
from the filter before disposal. Don’t ever dispose of oil
air
change your own oil, be sure to all free-flowing oil hold the cover on. Remove the cover and lift Out the
by putting it in the trash,-pouring it on the ground, into
sewers, or into streams or bodies of water. Instead,
recycle it by taking it to a place that collects used oil.
If
you have a problem properly disposing of your used oil,
ask your dealer, a service station or a local recycling
center for help. Insert a
new
air filter, then replace the air cleaner cow
Tighten the wing nuts to hold the cover in place. x.
6-14

Downloaded from www.Manualslib.com manuals search engine NOTICE: (Continued)
If you do find traction devices that will fit, install
them on the rear tires.
If you have other size tires, use tire chains only
where legal and only when you must. Use only
SAE Class
“S” type chains that are the proper
size for your tires. Install them on the drive axle
tires (four-wheel-drive vehicles can use chains on
both axles) and tighten them as tightly as possible
with the ends securely fastened. Drive slowly and
follow 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 or
spinning the wheels with chains on will damage
your vehicle.
Appearance Care
Remember, cleaning products can be hazardous. Some
are toxic. Others can 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 closed space.
When
you use anything from a container to clean your
vehicle, be sure
to follow the manufacturer’s warnings
and instructions. And always open your doors or
windows when you’re cleaning
the inside.
Never use these to clean your vehicle:
Gasoline
Benzene
Naphtha
Carbon Tetrachloride
Acetone
Paint Thinner
0 Turpentine
Lacquer Thinner
Nail Polish Remover
They can
all be hazardous -- some more than
others
-- and they can all damage your vehicle, too.
6-49