
Downloaded from www.Manualslib.com manuals search engine Off-Road Driving with Your
Four-Wheel-Drive Vehicle
This off-road guide is for vehicles that have
four-wheel drive.
Also, see “Anti-Lock Brakes”
in the Index.
If your vehicle doesn‘t have four-wheel drive, you
shouldn‘t drive off-road unless you‘re on a level,
solid surface.
Off-road driving can be great
fun. But it does have some
definite hazards. The greatest
of these is the terrain itself.
“Off-roading” means
you’ve left the great North
American road
system behind. Traffic lanes aren‘t
marked. Curves aren’t banked. There are
no road signs.
Surfaces can be slippery. rough, uphill
or downhill. In
short. you’ve gone right back to nature.
Off-road driving involves some new skills. And that’s
why it’s very important that you read this guide. You’ll
find many driving tips and suggestions. These will help
make your off-road driving safer and more enjoyable.
Before You Go Off-Roading
There are sutfre things to do before you go out. For
example, be sure
to have all necessary maintenance and
service work done. Check
to make sure all underbody
shields
(if so equipped) are properly attached. Be sure
you read all the information about your
four-wheel-drive vehicle
in this manual. Is there enough
fuel?
Is the spare tire fully inflated? Are the fluid levels
up where they should be? What are
the local laws that
apply to off-roading where you’ll be driving? If
you
don’t know, you should check with law enforcement
people
in the area. Will you be on someone’s private
land?
If so, be sure to get the necessary permission.
Loading Your Vehicle for Off-Road Driving
There are some important things to remember about
how
to load your vehicle.
The heaviest things should be on the load floor and
forward of your rear axle. Put heavier items as far
forward
as you can.
Be sure the load is secured properly, so driving on
the off-road terrain doesn’t toss things around.
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Downloaded from www.Manualslib.com manuals search engine A CAUTION:
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Cargo on the load floor piled higher than
the seatbacks can be thrown forward
during a sudden
stop. You or your
passengers could
be injured. Keep cargo
be
below
the top of the seatbacks.
Unsecured cargo on the load floor can
tossed about when driving over rough terrain. You or your passengers can be
struck by flying objects. Secure the
cargo properly.
Heavy loads on the roof raise the vehicle's
center
of gravity, making it more likely to
roll over. You can be seriously or fatally
in.jured
if the vehicle rolls over. Put heavy
loads inside the cargo area, not on the roof.
Keep cargo
in the cargo area as far forward
and low as possible.
You'll find other important information in this manual.
See "Vehicle Loading."
"Luggage Carrier" and "Tires"
in the Index.
Environmental Concerns
Off-road driving can provide whoIesome and satisfying
recreation. However.
it also raises environmental
concerns.
GM recognizes these concerns and urges
every off-roader
to follow these basic rules for
protectins the environment:
Always use established trails, roads and areas that
have been specially set aside
for public off-road
recreational drivihg; obey all posted regulations.
0 Avoid any driving practice that could damage the
environment
-- shrubs. flowers. trees, grasses -- or
disturb wildlife
(this includes wheel-spinning,
breaking down trees
or unnecessary driving through
streams or over
soft ground).
0 Always carry a litter bag . . . make sure all refuse is
removed from any campsite before leaving.
Take extreme care with open fires (where permitted).
camp stoves and lanterns.
0 Never park your vehicle over dry grass or other
cotnbustible materials that could catch fire
f1-0~11 the
heat
of the vehicle's exhaust system.
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Downloaded from www.Manualslib.com manuals search engine Scanning the Terrain
Off-road driving can take you over mLmy different kinds
of terrain.
You need to be fatniliar with the terrain and its
many different features.
Here are some things to consider.
Surface Cmditiom. Off-roading can take you over
hard-packed dirt, gravel. rocks. grass. sand, mud, snow
or ice. Each
of these surfaces affects the steering,
acceleration and brakinz
of your vehicle in different
ways. Depending upon the kind of surfxe you are on.
you may experience slipping. sliding. wheel spinning.
delayed acceieration, poor traction and longer
braking distances.
Sru-fnce 0hstcrcle.v. Unseen or hidden obstacles can be
hazardous.
A rock. log hole. rut or bump CUI startle you if
you're not prepared for them. Often these obstacles are
hidden
by grass, bushes. snow or even the rise and fall of
the terrain itself. Here are some things to consider:
Is the path ahead clear'?
0 Will the surface texture change abruptly up ahead'?
Does the travel take you uphill or downhill'? (There's
more discussion
of these sub-jects later.)
Will you have to stop suddenly or change
direction quicklv'? When
you drive
over obstacles or rough terrain, keep a
firm grip on the steering wheel. Ruts, troughs or other
surface features can jerk the wheel out of
your hands if
you're not prepared.
When
you drive over bumps. rocks, or other obstacles,
your wheels can leave
the ground. If this happens. even
with one or two wheels, you can't control the vehicle as
well or at all.
Because you
will be on an unpaved surface. it's
especially important to avoid sudden acceleration.
sudden
turns or sudden braking.
In a way, off-road driving requires a different kind of
alertness from driving on paved roads and highways.
There are
no road signs. posted speed limits or signal
lights. You have to
use your own good judgment about
what is
safe and what isn't.
Drinking and driving can be very dangerous on any
road.
And this is certainty true for off-road driving. At
the very time you need special alertness and driving
skills, your reflexes. perceptions and judgment can be
affected
by even z1 small amount of alcohol. You could
have a serious -- or even fatal -- accident if you drink
and drive or ride with a driver who has been drinking.
See "Drunken Driving" in the index.
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Downloaded from www.Manualslib.com manuals search engine 0
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Driving Uphill
Once you decide you can safely drive up the hill, you
need to take some special steps.
Use
a low gear and get a firm grip or1 the
steering wheel.
Get
a smooth start up the hill and try to maintain
your speed. Don't use more power than you need.
because
you don't want your wheels to start spinning
or sliding.
Try to drive straight up the
hill if at all possible. If
the path twists and turns, you might want to find
another route.
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I A CAUTION:
Turning or driving across steep hills can be
dangerous. You could lose traction, slide
sideways, and
possibly roll over. You could be
seriously injured or killed. When driving up hills,
always try
to go straight up.
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Ease LIP on your speed as you approach the top of
the hill.
Attach a flag to the vehicle to make you more visible
to approaching traffic on trails or hills.
Sound the horn as you approach the top of the hill to
let opposing traffic know you.1-e there.
Use your headlamps even during the day. They make
you more 1:isible to oncoming traffic.
A CAUTION:
Driving to the top (crest) of a hill at full speed can
cause an accident. There could be
a drop-off,
embankment, cliff, or even another vehicle. You
could
be seriously injured or killed. As you near
the top of
a hill, slow down and stay alert.
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Downloaded from www.Manualslib.com manuals search engine @ What should I do if my vehicle stalls, or is about
A: If this happens, there are some things you should
to stall, and I can’t make it up the hill?
do. and there are some things you must not do.
First, here’s what
you should do:
0 Push the brake pedal to stop the vehicle and keep it
from rolling backwards. Also, apply the parking brake.
0 If your engine is still running, shift the transmission
to REVERSE
(R), release the parking brake, and
slowly back down the hill
in REVERSE (R).
0 If your engine has stopped running, you’ll need to
restart it. With the brake pedal depressed and the
parking brake still applied, shift
the transmission to
PARK (P) (or, shift to NEUTRAL (N) if your
vehicle has a manual transmission) and restart
the
engine. Then, shift to REVERSE (R), release the
parking brake, and slowly back down the
hill as
straight as possible in REVERSE (R).
As you are backing down the hill, put your left hand
on the steering wheel at the 12 o’clock position. This
way, you’ll be able
to tell if your wheels are straight
and maneuver
as you back down. It’s best that you
back down the hill with your wheels straight rather
than
in the left or right direction. Turning the wheel
too far to the left or right will increase the possibility
of
a rollover.
Here are some things
you must not do if you stall, or are
about
to stall, when going up a hill.
0 Never attempt to prevent a stall by shifting into
NEUTRAL
(N) (or depressing the clutch, if you
have
a manual transmission) to “rev-up” the engine
and regain forward momentum. This
won’t work.
Your vehicle will roll backwards very quickly and
you could go out of control.
Instead, apply the regular brake
to stop the
vehicle. Then apply
the parking brake. Shift to
REVERSE
(R), release the parking brake, and
slowly back straight down.
0 Never attempt to turn around if you are about to stall
when going up
a hill. If the hill is steep enough to
stall your vehicle, it’s steep enough to cause you to
roll over if you turn around. If you can’t make it up
the hill, you must back straight down the hill.
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Downloaded from www.Manualslib.com manuals search engine Driving Downhill
When off-roading takes you downhill, you’ll want to
consider a number of things:
0 How steep is the downhill? Will I be able to maintain
vehicle control?
0 What’s the surface like? Smooth? Rough‘? Slippery‘?
Hard-pac ked dirt
‘? Gravel?
0 Are there hidden surface obstacles? Ruts’?
Logs? Boulders’?
0 What’s at the bottom of the hill? Is there a hidden
creek bank or even
a river bottom with large rocks?
If you decide you can go down a hill safely, then try to
keep your vehicle headed straight down, and use a low
gear. This
way. engine drag can help your brakes and
they
won‘t have to do all the work. Descend slowly,
keeping
y)ur
ehick under control at all times.
I A CAUTION:
1 I
Heavy braking when going aown a hill can cause
your brakes
to overheat and fade. This could
cause
loss of control and a serious accident.
Apply the brakes lightly when descending a hill
and use
a low gear to keep vehicle speed
under control.
&= Are there some things I should not do when
driving down a
hill?
A: Yes! These are important because if you ignore them
you could lose control and have a serious accident.
0 When driving downhill, avoid turns that take you
across the incline of the hill. A hill that’s not too
steep
to drive down may be too steep to drive across.
You could roll over if you don’t drive straight down.
NEUTRAL (N). or with the clutch pedal depressed
in a manual shift. This is called “free-wheeling.”
Your brakes will have
to do all the work and could
overheat and fade.
0 Never go downhill with the transmission in
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Downloaded from www.Manualslib.com manuals search engine Q: Am I likely to stall when going downhill?
A: It’s much more likely to happen going uphill. But if
it happens going downhill, here’s what to do.
0 Stop your vehicle by applying the regular brakes.
Shift to PARK (P) (or to NEUTRAL (N) with the
Apply the parking brake.
nlanual
transmission) and, while still brakin,,
0 restart
the engine.
and drive straight down.
Shift back to a low gear. release the parking brake,
If the engine won’t start, get out and get help.
Driving Across an Incline
Sooner or later, an off-road trail will probably go across
the incline of a hill. If this happens, you have to decide
whether
to try to drive across the incline. Here are some
things
to consider:
0 A hill that can be driven straight up or down may be
too steep to drive across. When you
go straight up or
down
a hill. the length of the wheel base (the
distance from the front wheels
to the rear wheels)
reduces the likelihood
the vehicle will tumble end
over end.
But when you drive across an incline, the
much more narrow track width (the distance between
the left and
right wheels) may not prevent the vehicle
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from tilting and rolling over. Also, driving across an
incline puts more weight
on the downhill wheels.
This could cause
a downhill slide or a rollover.
Surface conditions can be
a problem when you drive
across
a hill. Loose gravel. muddy spots, or even wet
If the vehicle slips sideways. it can hit something
that
will trip it (a rock. a rut, etc.) and roIl over.
Hidden obstacles can make the steepness
of the
incline even worse. If you drive across a rock with
the uphill wheels, or if the downhill wheels drop into
a rut or depression, your vehicle can tilt even more.
2 orass can cause your tires to slip sideways. downhill.
For reasons like these, you need
to decide carefully whether
to try to drive across 31 incline. Just because the trail goes
;lcross the incline doesn’t mean you have to drive it. The
last vehcle
to try it might have rolled over.
A CAUTION:
Driving across an incline that’s too steep will
make your vehicle roll over. You could be
seriously injured or killed.
If you have any doubt
about the steepness
of the incline, don’t drive
across it. Find another route instead.
A
4-24

Downloaded from www.Manualslib.com manuals search engine Driving in Mud, Sand, Snow or Ice
When you drive in mud. snow or sand. your wheels
won't get good traction. You can't accelerate as quickly,
turning is more difficult. and you'll need longer
braking distances.
It's best
to use a low gear when you're in mud -- the
deeper the mud. the lower the gear.
In really deep mud.
the idea is
to keep your vehicle moving so you don't
b *et stuck.
When you drive on sand,
you'll sense a change in wheel
traction. But
it will depend upon how loosely packed the
sand is.
On loosely packed sand (as on beaches or sand
dunes) your tires will tend to
sink into the sand. This has
an effect on steering. accelerating and braking.
You may
want to reduce the air pressure in your tires slightly
when driving on sand. This
will improve traction.
Hard packed
snow and ice offer the worst tire traction.
On these surfaces,
it's very easy to lose control. On wet
ice,
for example. the traction is so poor that you will
have difficulty accelerating. And if you do get moving,
poor steering and difficult braking can
came you to slide
out
of control.
I A CAUTION:
Driving on frozen lakes, ponds or rivers can be
dangerous. Underwater springs. currents under
the ice, or sudden thaws can weaken the ice. Your
vehicle could fall through the
ice and you and
your passengers could drown. Drive your vehicle
on safe surfaces only.
Driving in Water
Light rain causes no special off-road driving problems.
But heavy rain can mean tlash flooding, and flood
waters demand extreme caution.
Find out
how deep the water is before you drive through
it. If it's deep enough to cover your wheel hubs, axles or
exhaust pipe. don't
try it -- you probably won't get
through. Also. water that deep can damage your axle
and other vehicle parts.
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