ECU GMC SIERRA 1993 User Guide

7. Push and pull the child restraint in different directions to be sure it is
To remove the child restraint, unbuckle the vehicle's safety belt \
and let it go
back all the way. The safety belt will move freely again and be ready
to work
for an adult or larger child passenger. secure.
2- .. 9. j .I 5.. :
8
'.I
149
ProCarManuals.com

Features & Controls
Tailgate
I.
K2232
You can open the tailgate by lifting up on its handle while pulli\
ng the tailgate
toward you.
To shut the tailgate, firmly push it away from you into the latch.
When you put the tailgate back up, pull it back towards you,
to be sure it
latches securely.
Quick-Release Tailgate
A
K2346
2-8
ProCarManuals.com

If you have a quick-release tailgate it can be removed by:
1. Raising the tailgate slightly and removing both retaining cables.
2. Lift the tailgate at the right side and pull it out at the left side.
Reverse the above procedure to reinstall. Make sure the tailgate is secure.
Then
Vehicle theft is a big business, especially in some cities. Although your
vehicle has a number of theft deterrent features, we know that nothing we
put on it can make it impossible to steal. However, there are ways you can
help.
Key in the Ignition: If you walk away from your vehicle with the keys inside,
it’s an easy target for joy riders or professional thieves-so don’t do it. When
you park your vehicle and open the driver’s door, you’ll hear a tone reminding
you to remove your key from the ignition and take it with you. Always do
this. Your steering wheel will be locked, and
so will your ignition. If you have
an automatic transmission, taking your key out also locks your \
transmission.
And remember to lock the doors.
Parking at Night: Park in a lighted spot, close all windows and lock your
vehicle. Remember to keep your valuables out of sight. Put them in a storage
area, or take them with you.
Parking Lots: If you park in a lot where someone will be watching your vehicle\
,
it’s best to lock it up and take your keys. But what
if you have to leave your
ignition key? What
if you have to leave something valuable in your vehicle?
Put your valuables in a storage area or console.
Lock the console.
Lock all doors except the driver’s,
Then take the door key with you.
2-9
ProCarManuals.com

.
You can only drive for a short time with the reading in either warning zone. If
you must drive, turn
off all unnecessary accessories, and have the vehicle
serviced as soon as possible.
Camper Wiring Harness
The optional 5-wire harness is stored in’ the front stake pocket on the driver’s
side of’ the bed. The harness has no connector, and should be wired by\
a
qualified electrical service person.
It must be routed out of your vehicle and
securely attached
so that it won’t be pulled or rubbed while you’re using it.
Store the -harness in its original place. Wrap the harness together and tie it
neatly
so it won3 be damaged.
The optional 7-wire harness
is stored under your vehicle along the rear frame
crossmember. The harness has a’
30 amp. in-line fused battery feed wire and
no connector, and should be wired by a qualified electrical se\
rvice person.
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 won’t
bind
or break when turning with the trailer, but not so loose that it drags on
the ground.
Store the harness in its original position. Wrap the harness together and tie it
neatly so it won’t be damaged. ,
2-9 1
ProCarManuals.com

Your Driving and the Road
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
Be sure the load is secured properly, so driving on the off-road terrain
axle. Put heavier items as far forward as you can.
doesn’t toss things around.
CAUTION
Cargo on the load floor piled higher than the seatbacks can be
3 thrown forward during a sudden stop. You or your passengers
could be injured. Keep cargo below the top
01 le seatbacks.
- Unsecured cargo on the load floor ca- >e tossecl about when
3-7 driving over rough terrain. You or your passengers can be strum
& by flying objects. Secure the cargo properly*
Heavy loads on the roof raise the vehicle’s center of gravi\
ty.
making it more likely
to roll over. You can be seriously injured
the vehicle rolls over. Put heavy loads inside the cargo area, not
on the roof. Keep in the cargo area as far forward and
low as Dossible.
I
You’ll find other important information in this manual. See “Vehicle Loading,’’
and “Tires” in the Index.
Traveling to Remote Areas
It makes sense to plan your trip, especially when going to a remote area.
Know the terrain and plan your route. You are much less likely to get bad
surprises. Get accurate maps of trails and terrain.
Try to learn of any blocked
or closed roads.
It’s also a good idea to travel with at least one other v\
ehicle. If something
happens to one of them, the other can help quickly.
Does your vehicle have a winch?
If so, be sure to read the winch
instructions. In a remote area,
a winch can be handy if you get stuck. But
you’ll want to know how to use
it properly.
Getting Familiar with Off-Road Driving
It’s a good idea to practice in an area that’s safe and close to home before
you
go into the wilderness. Off-road driving does require some new and\

different driving skills. Here’s what we mean.
4-26
ProCarManuals.com

Your Driving and the Road
Winter Driving
- AM480004
Here are some tips for winter driving.
Have your vehicle in good shape for winter. Be sure your engi\
ne coolant
mix is correct.
Snow tires can help in loose snow, but they may give you less traction
on ice than regular tires.
If you do not expect to be driving in deep
snow, but may have to travel over ice, you may not want to \
switch to
snow tires at all.
You may want to put winter emergency supplies in your vehicle.\

Include an ice scraper, a small brush or broom,
a supply of windshield
washer fluid, a rag, some winter outer clothing, a small shovel, a flashlight, a
red cloth, and a couple of reflective warning triangles. And,
if you will be
driving under severe conditions, include a small bag of sand, a piece of old
carpet or a couple
of burlap bags to help provide traction. Be sure you
properly secure these items in your vehicle.
Driving on Snow or Ice
Most of the time, those places where your tires meet the road probably\
have
good traction.
However,
if there is snow or ice between your tires and the road, you ca\
n
have a very slippery situation. You’ll have a
lot less traction or “grip” and will
need to be very careful.
4-52
ProCarManuals.com

Driving with a Trailer
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
so responsive as your vehicle is by itself.
Before you start, check the trailer hitch and platform, safety \
chains, electrical
connector, lights, 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 lights and any trailer brakes are still working.
Following Distance
Stay at least twice as far behind the vehicle ahead as you w\
ould when
driving your vehicle without a trailer. This can help you avoid situations \
that
require heavy braking and sudden turns.
Passing
You’ll need more passing distance up ahead when you’re towing a trailer.
And, because you’re a good deal longer, you’ll need to g\
o much farther beyond the passed vehicle before you can return to your lane.
Backing Up
Hold the bottom of the steering wheel with one hand. Then, to move the
trailer left, just move your hand to the left.
To move the trailer to the right,
move your hand to the right. Always back up slowly and,
if possible, have
someone guide you.
Making Turns
When you’re turning with a trailer, make wider turns than normal. Do this so
your trailer wheels won’t strike soft shoulders, curbs, road signs\
, trees, or
other objects. Avoid jerky or sudden maneuvers. Signal well in advance.
Turn Signals When Towing a Trailer
When you tow a trailer, your vehicle has to have a different turn signal
flasher and extra wiring. The green arrows on your instrument \
panel will flash
whenever you signal a turn or lane change. Properly hooked up, the trailer
lights will also flash, telling other drivers you’re about t\
o turn, change lanes,
or stop.
When towing a trailer, the green arrows on your instrument pan\
el will flash for
turns even
if the bulbs on the trailer are burned out. Thus, you may think
4-59
ProCarManuals.com

Problenrs on the Road
Towing Your Vehicle
Try to have a GM dealer or a professional towing service tow your vehicle.
They can provide the right equipment and know how to tow it without dam-
age.
If your vehicle has been changed since it was factory-new, by adding things
like fog lamps, aero skirting, or special tires and wheels, th\
ese things could
be damaged during towing.
Before you do anything, turn on the hazard warning flashers.
When you call, tell the towing service:
That your vehicle has rear-wheel drive, or that it has the four-wheel drive
option.
The make, model, and year of your vehicle.
Whether you can move the shift lever for the transmission and \
transfer case,
if you have one.
If there was an accident, what was damaged.
I A To help avoid injury to you or others:
Never let passengers ride in a vehicle that is being towed.
Never tow faster than safe or posted speeds.
Never tow with damaged parts not fully secured.
Never get under your vehicle after it has been lifted by the tow
truck.
Always use separate safety chains on each side when towing a
vehicle.
When your vehicle is being towed, have the ignition key
off. The steering
wheel should be clamped in a straight-ahead position, with a clamping device
designed for towing service.
Do not use the vehicle’s steering column lock for
this. The transmission and transfer case,
if you have one, should be in Neu-
tral and the parking brake released.
If you have a two-wheel drive vehicle, don’t have your vehicle \
towed on the
rear wheels, unless you must. If the vehicle must be towed on\
the rear
wheels, don’t go more than
35 mph (56 km/h) or farther than 50 miles (80
krn) or your transmission will be damaged. If these limits must be exceeded,
then the rear drive wheels have to be supported on a dolly.
5-8
ProCarManuals.com

Pzloblenrs on the Road
Pull the retainer through the wheel center. Attach the ratchet,\
with the UP
side facing you, to the wheel wrench. Put the chisel end of the wheel wrench
into the hole in the rear bumper. Turn the ratchet 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.
Return the jack, ratchet, wheel wrench and jack extensions to their location
behind the passenger’s seat. Secure the items and replace th\
e jack cover
if
there is one.
Storing Tire ln Pickup Bed
K2534
1. Place the bolt through the bottom wheel nut hole. Be sure the valve
2. Place the nut on the bolt and turn it clockwise until the ti\
re is secure.
faces out.
532
ProCarManuals.com

Service & Appearance Care
Windshield Wiper Blade Inserts
I -
r
PO232
To replace the windshield wiper blade insert, lift the wiper arm and rotate the
blade until it is facing away from the windshield. Unlatch the\
end of the insert
from the holding clips. Remove the insert and slide a new one\
in place.
Make sure the blade is secured in the clips.
Air Conditioning
Every now and then have your dealership check your air conditi\
oning system
to be sure it has not lost any cooling ability.
If you think the system is not
working properly, have your dealership check it out as soon as\
possible.
The air conditioning will not work when the temperature is bel\
ow 40°F
(4°C).
Fluid Leak Check
After the vehicle has been parked for a while, inspect the su\
rface under the
vehicle
for water, oil, fuel or other fluids. Water dripping from the air
conditioning system after it has been used is normal, If you notice fuel leaks
or fumes, the causes should be found and corrected at once.
Lubrication
Accelerator Control System
Your maintenance schedule will tell you how often the accelerator linkage
pivot points must be lubricated. See “Recommended Fluids and \
Lubricants” in
the Index for the proper lubricant to use.
6-52
ProCarManuals.com