1993 GMC SIERRA wiring

Featums & Contmls
Parking Brake ........................................................................\
.............................. 2-29
Parking Over Things That Burn
........................................................................\
. 2-33
Engine Exhaust
........................................................................\
........................... 2-34
Running Your Engine While You’re Parked
...................................................... 2-35
Four-wheel Drive
........................................................................\
........................ 2-36
Transfer Case
........................................................................\
.......................... 2-37
Front Axle Locking Feature
........................................................................\
.... 2-38
Windows
........................................................................\
....................................... 2-39
Horn
........................................................................\
.............................................. 2-41
Tilt Wheel
........................................................................\
..................................... 2-41
Multifunction Lever
........................................................................\
...................... 2-42
Turn Signal and Lane Change Indicator
....................................................... 2-43
Headlight High-Low Beam
........................................................................\
...... 2-44
Windshield Wipers
........................................................................\
................... 2-45
Windshield Washer
........................................................................\
.................. 2-46
Cruise Control
........................................................................\
.......................... 2-47
Headlights and Vehicle Lighting
........................................................................\
. 2-53
Mirrors
........................................................................\
.......................................... 2-59
Sun Visors
........................................................................\
................................... 2-61
Cigarette LighterlAshtrays
........................................................................\
........... 2-62
Storage Compartments
........................................................................\
............... 2-63
Instrument Cluster ........................................................................\
....................... 2-70
Warning and Indicator Lights
........................................................................\
.. 2-78
Gages
........................................................................\
....................................... 2-87
Camper Wiring Harness
........................................................................\
............. 2-91
Trailer Wiring Harness
........................................................................\
................ 2-91
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Push the right side of the switch with the 0 symbol on it to turn off your
lights.
Turn the dial at the right of the
off switch to adjust interior lights. Turning the
dial
all the way up turns on the interior lights.
You can switch your headlights from high to low beam by pulling o\
n the turn
signal/high beam lever.
A circuit breaker protects your headlights. If you have an electrical overload,
your headlights will flicker on and
off. Have your headlight wiring checked
right away
if this happens.
Headlights-On Reminder
A buzzer will sound when your headlights are turned on and your ignition is
in Off, LOCK or Acc.
Fog Lamps
Use your optional fog lamps for better vision in foggy or misty conditions.
Your fog lamps will operate with your low beam headlights or parking li\
ghts
on,
and go off when the high beam headlamps are on. Switching to low
beam headlights or parking lights will let you use the fog la\
mps again.
The fog lamp switch is on the instrument panel below the heating controls.
Press the side of the switch with the fog lamp symbol on
it to turn the fog
lamps on, and the left side of the switch
to turn them off. A light will glow in
the left side of the switch when they are on.
K2294
Remember, fog lamps alone will not give off as much light as your headlights.
Never use your fog lamps in the dark without turning on your headlights.
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.
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. ,
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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
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CAUTION
It can be dangerous to get out of your vehicle if the shift lever is not
fully in
P (Park) with the parking brake firmly set. Your vehicle can
roll.
If you have left the engine running, the vehicle can move suddenl\
y.
You
or others could be injured. To be sure your vehicle won’t move,
when you’re on fairly level ground, use the steps that follow.
If you have four-wheel drive and your transfer case is in N (Neutral),
your vehicle will be free to
roll, even if your shift lever is in P (Park).
So, be sure the transfer case is in a drive gear-not in N (Neutral).
If you are parking on a hill, or if you’re pulling a trailer, also see
“Parking On Hills” in the Index.
When You Are Ready to Leave After Parklng on a Hill
1. Apply your regular brakes and hold the pedal down while you:
Start your engine;
Shift into a gear; and
Release the parking brake.
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 To wing
Your vehicle will need service more often when you’re pulling a trailer. See
the Maintenance Schedule for more on this. Things that are esp\
ecially
important in trailer operation are automatic transmission fluid (don’t overfill),
engine oil, axle lubricant, belts, cooling system, and brake ad\
justment. 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.
mailer Wiring Harness
See “Trailer Wiring Harness’’ in the Index.
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Service & Appearance Care
4. Push in gently on the bulb, turn it counterclockwise 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 light assembly and replace the lens and lens
seal.
Fuses and Circuit Breakers
The wiring circuits in your vehicle are protected from short circuits by a
combination of fuses, circuit breakers, and fusible thermal links in the wiring
itself. This greatly reduces the chance of fires caused by electrical problems.
See “Fuses and Circuit Breakers’’ in the Index for more information.
Headlights
The headlight wiring is protected by a circuit breaker in the light switch. An
electrical overload will cause the lights to go on and
off, or in some cases to
remain
off. If this happens, have your headlight wiring checked right away.
Windshield Wipers
The windshield wiper motor is protected by a circuit breaker a\
nd a fuse. If
the motor overheats due
to heavy snow, etc., the wiper will stop until the
motor cools.
If the overload is caused by some electrical problem and not
snow, etc., be sure to get it fixed.
Power Windows and Other Power Options
Circuit breakers in the fuse panel protect the power windows and other power
accessories. When the current load is too heavy, the circuit breaker opens
and closes, protecting the circuit until the problem is fixed or goes away.
Trailer Wiring Harness
The optional seven-wire trailer wiring harness is protected by an in-line fuse
in the battery feed wire. This fuse is near the junction block. See “Trailer
Wiring Harness” in the Index for more information.
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you use leaded fuel, you could damage your three-way catalytic converter,
and other engine components.
Computer Command Control System (All TBI equipped
vehicles and diesel engine vehicles below
8,500 lbs. GVWR)
Gasoline Engines
This system has an oxygen (OS) sensor that helps keep your engine’s air-fuel
mixture at a proper level. Use only unleaded fuel in your veh\
icle.
If you use
leaded fuel, you could damage your oxygen
(OS) sensor and three-way
catalytic converter.
Diesel Vehicles Below 8,500 LBS. GVWR
This system monitors engine speed and throttle position. It adj\
usts exhaust gas recirculation to limit emissions.
The Malfunction Indicator Lamp
(SERVICE ENGINE SOON) on your
instrument panel lets you know when your emission control syste\
m needs
service. The light will come on briefly when you start your e\
ngine to let you
know that the system is working. If
it does not come on when you start your
engine, or
if it comes on and stays on while you’re driving your system may \
need service. Your vehicle should still be driveable, but you should have your
system serviced right away.
Secondary Air Injection (AIR) System
You may have this system. It lets you know if your engine control module,
wiring harness or solenoid need service.
If the Malfunction Indicator Lamp
(Service Engine Soon) comes on, you need service.
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C
Camper Wiring Harness .............. 2-91
Capacities/Specification Charts .. 6-95
Cassette Tape Player
Catalytic Converter
...................... 6-65
Certificationnire Label
................. 6-67
Changing
A Flat Tire ........ 5.17. 5-23
Chemical Paint Spotting
.............. 6-90
Child Restraints
Cigarette Lighter/Ashtrays
........... 2-62
Circuit Breakers (See “Fuses”)
Cleaning (See
“Audio Systems”)
(See “Safety Belts”)
Finish Care
................................ 6-88
Glass
.......................................... 6-87
Inside of Vehicle
....................... 6-85
Instrument Panel. Top
............. 6-87
Outside of Vehicle
.................... 6-88
Special Problems
...................... 6-86
Vinyl
or Leather ........................ 6-87
Wheels and Tires
..................... 6-89
Windshield
................................ 6-88
Clock
................................... 3-1 2. 3-1 5
Computer Command Control
System
..................................... 6-66
Conversion to Chassis Cab
........ 6-72
Coolant (See “Engine”)
Cooling System
............................ 5-1 1
Capacity
.................................... 6-96
Crankcase Capacity
...................... 6-96
Cruise Control
............................... 2-47
Increase Speed
......................... 2.50
On Hills ...................................... 2-51
Passing
...................................... 2-51
Resume
..................................... 2-49
Set
.............................................. 2-48
To Get Out Of
.......................... 2-52
Cup Holder
.................................... 2-65
Customer Assistance for the
Customer Satisfaction Procedure.8-2 Reduce Speed
.......................... 2-51
Hearing
or Speech Impaired .... 8-3
D
Daytime Running Lights
(Canada Only)
.................... 2.55. 2-84
Indicator Light
............... 2.55. 2-84
Diesel Fuel (See “Fuel”)
Dome Lights
................................. 2-56
Doors
............................................... 2-5
Driving Locks
............................................ 2-6
Across an Incline
..................... 4-33
After Off-Road Driving
............ 4-36
At Night
.......................... 4.36. 4-38
Backing Up
............................... 4-59
Defensive
................................... 4-10
Downhill
..................................... 4-31
Freeway
..................................... 4-43
High Beams
.............................. 4-37
Highway Hypnosis
................... 4-46
Hydroplaning
............................. 4-39
In Blizzard
................................. 4-54
In City
....................................... 4-42
In Fog. Mist and Haze
. 4.41 . 4-42
In Rain
............................ 4.38. 4-40
In Sand. Mud. Ice.
Or Snow .................................. 4-34
In Water
.................................... 4-35
Long Distance
.......................... 4-45
Loss of Control
........................ 4-24
Night Vision
.............................. 4-37
Off-Roading
............................... 4-25
On Curves
................................. 4-20
On Grades
................................. 4-60
On Hill and Mountain Roads
. 4-47
On Off-Road Hills
.................... 4-28
On Snow
or Ice .. 2.15. 4.52. 4-55
Passing
............................ 4.22. 4-59
Skidding
..................................... 4-24
Stuck in Deep Snow
..... 4.54. 5-33
Through Water
.............. 2.15. 4-35
Uphill
.......................................... 4-29
Winter
........................................ 4-52
With a Trailer
............................ 4-55
Drunken Driving
........................... 4-11
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