1993 GMC SIERRA headlights

Your Driving and the Road
Tips on Driving in Fog
If you get caught in fog, turn your headlights on low beam, \
even in daytime.
You’ll see-and be seen-better. Use your fog lights
if your vehicle has them.
Don’t use your high beams. The light will bounce
off the water droplets that
make up fog and reflect back at you.
Use your defogger. In high humidity, even a light buildup of moisture on the
inside of the glass will cut down on your already limited visibility. Ru\
n your
windshield wiper and washer occasionally. Moisture can build up on the
outside glass, and what seems to be
fog may actually be moisture on the
outside of your windshield.
Treat dense fog as an emergency.
Try to find a place to pull off the road. Of
course you want to respect another’s property, but you might need to put
something between you and moving vehicles-space, trees, telephone\
poles,
a private driveway, anything that removes you from other traffic.
If visibility is near zero and you must stop but are unsure whether you are
away from the road, turn your lights on, start your hazard wa\
rning flasher,
and sound your horn at intervals or when you hear approaching \
traffic.
Pass other vehicles in fog only
if you can see far enough ahead to pass
safely. Even then, be prepared to delay your pass
if you suspect the fog is
worse up ahead. If other vehicles try to pass you, make it easy for them.
City Driving
AM460003
One of the biggest problems with city streets is the amount of traffic on them.
You’ll want to watch out for what the other drivers are doing, and keep clos\
e
track
of traffic signals.
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AM480043
Run your engine only as long as you musk. This saves fuel. When you run
the engine, make it go a little faster than just idle. That is, push the
accelerator slightly. This uses less fuel for the heat that yo\
u get and
it keeps
the battery (or batteries) charged. You will need a well-charged battery (or
batteries) to restart the' vehicle, and possibly for signaling later on with your
headlights. Let the heater run for awhile.
If you 'have a diesel engine, you
may have to run it at a higher speed
to lget enough heat. Then, shut the
engine
off and close the window almost all the way to preserve the heat.
Start the engine again and repeat this only when you feel really
uncomfortable from the cold. But
do it as little as'possible. Preserve the fuel
as long as you can.
To help keep warm, you can get out of the vehicle and
do some fairly vigorous exercises every half hour or so until help comes.
If You're Stuck in Deep Snow
This manual explains how to get the vehicle out of deep snow without
damaging it. See "Rocking Your Vehicle" in the Index.
Towing a mailer
CAUTION I
If you don't use the correct equipment and drive properly, you ca\
n
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 injured. Pull a trailer only if \
you have
followed all the steps in this section.
I
i'- ." "
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Sealed Beam Headlights
t i
1. Remove the four screws from the headlight retainer.
2. Pull the headlight out and remove the retainer.
3. Unplug and remove old headlight.
4. Plug in the new headlight and put it in place.
5. Install the retainer to the headlight.
6. Install the screws.
Halogen Bulbs
Halogen bulbs have pressurized gas inside and can burst if you drop
or scratch the bulb. You or others could be injured. Take special care
when handling and disposing of halogen bulbs.
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Avoid touching the bulb or letting it come in contact with anything damp
Oil from your skin or moisture on the bulb can cause the bulb to explode
when
it is turned on. If either comes in contact with the bulb, clean it with
alcohol or
a suitable degreaser and wipe the bulb dry.
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Service & Appearance Care
Composite Headlights
A
1
I
PO234
1. Remove the two screws at the top of the radiator support.
2. Pull the composite headlight lens out.
3. Unplug the electrical connector.
4. Turn the bulb counterclockwise and remove it. ,
5. Put the new bulb in and turn it clockwise until it is tight.
6. Plug in the electrical connector.
7. Put the headlight back into the vehicle and tighten the two screws.
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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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1 Add-on Equipment ................... 6-94
I- Electronic Heatinghir Conditioning
(See "Heating")
Adding Coolant
... 5.12, 5.14. 6-44
... Engine I
Air Cleaner ................................ 6-31
Block Heater
.......... 2.19. 3.5. 6-26
Cold Weather Starting (Diesel)
.................... 2-1 7
Coolant
....... 5.12. 5-1 4. 6.42. 6-96
Coolant Temperature Gage
...... 2-88
Diesel
................................ 6.6. 6-1 9
Crankcase
.................................. 6-96
Fan Noise
.................................. 5-1 7
Noise Control System
.............. 6-1 9
.-Identification,
............................ 6-95
Oil .(See "Oil")
Overheating
................................. 5-9
Running While Parked
............. 2-35
Equipment, Add-on
...................... 6-69
Exhaust System
................ 2.34, 6-65
Exhaust
........................... 2.34,
6-65
Starting
............................ 2.12, 2-1 5
F
Fan Noise ...................................... 5-1 7
Filter
. Replacement Chart ............ 6-99
Finish Care
............................................ 6-88
Damage
..................................... 6-90
Automatic Transmission
........... 6-33
Brake
.......................................... 6-49
Coolant
............................ 5-1 2. 6-42
Front Axle
.................................. 6- 40
Hydraulic Clutch
....................... 6-37
Leak Check
................................ 6-52
Manual Transmission
................ 6-36
Power Steering
............ 1 ............ 6-46
Radiator
....................................... 5-1 4
Fluid
9-3
Rear Axle .................................. 6-41
Recommended Fluids
.............. 7-25
. Transfer Case ............................ 6-39
Windshield Washer.
................. 6-48
Fog Lamps
.................................... 2-54 .
Four-wheel Drive ............... 2.36, 6-39
Transfer Case
................ .2-37, 6-39
Front Axle
................................. 6-40
Fuel (Diesel Engines)
..................... 6.6
Cold Weather Operation
............ 6-7
Filter Replacement
........ 6-1 1, 6.13,
6-99
Fuel Requirements
..................... 6-6
Gage
........................ ; ................. 2-87
Running Out Of
........................ 6-10
Tank Capacity
........................... 6-97
Water in Fuel
.............................. 627
Fuel (Gasoline Engines)
................. 6-4
Filling Your Ta'nk
....................... 6-16
Foreign
. Countries ..................... 6-15
Gage
.......................................... 2-87
Gasolines for Cleaner Air
......... 6-5 A-
Fuses and Circuit
Breakers
............................ 6-64, 6-1 01 * .
Fuse Block ................................ 6-65 . . f
Headlights .................... 6.64, 6-100
Power Windows and Other
Trailer Wiring Harness
.. 6.64, 6-1 00
. Windshield Wipers ...... 6-64, 6-100
G
Gages ............................................ 2.87
Coolant Temperature Gage
..... 2-88
Fuel Gage
.................................. 2-87
Odometer
................................... 2-76
Oil Pressure Gage
..................... 2-89
Speedometer.
............................ 2-76
Tachometer
..................... 2.76, 2-78
Trip Odameter 2-77
Voltmeter
................................... 2-90
-
-.
I
Power Options ......... 6.64, 6-100 :
. ...........................
...
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INDEX
H
Halogen Bulbs .............................. 6-55
Hazard Warning Flashers
.............. 5-2
Head Restraints
.............................. 1-5
Headlights .......................... 2.53. 6-55
Composite
.................................. 6-56
Halogen
..................................... 6-55
High-Low Beam
........................ 2-44
Reminder
................................... 2-54
Sealed Beam
............................. 6-55
Heating System (with NC)
........... 3-5
Rear Window Defogger
............. 3-8
System Controls
......................... 3-6
Fan Knob
..................................... 3-4
Function Lever
............................ 3-4
Temperature Lever
...................... 3-4
Hitches
........................................... 4-58
Hood Checking Under
........................ 6-17
Latches and Hinge
................... 6-53
Release
...................................... 6-1 7
Horn
............................................... 2-41
Hydraulic Clutch
........................... 6-37
Grease Fitting
............................ 6-39
Hydro-Boost System (Hydraulic Pump)
..................... 6-50
Hydroplaning
................................. 4-39
I
If You’re Stuck In Sand. Mud.
Ice or Snow
.............................. 5-33
Ignition Switch
.............................. 2-1 0
Inflation-Tire Pressure ................. 6-73
Instrument Panel
............... 2-70. 2-76
Diesel Tach Cluster .................. 2-75
Standard Cluster
............ 2-72, 2-73
J
High Beam Indicator Light ...... 2-85
Heating System (without AIC)
..... 3-4
Rear Window Defogger
............. 3-8
Highway Hypnosis
........................ 4-46 Jack Storage
...................... 5.19.
5-31
Jump Starting
................................ 5-3
K
Key Release Lever ....................... 2-11
Keys
................................................. 2-3
L
Lights ............................................. 2-53
Brake System Warning
............ 4-18
Bulb Replacement
......... .6-54, 6-98
Cargo Lamp
.................... 2-58, 6-61
Charging System Light
........... 2-82
Check Gages Light
.................. 2-84
Dome Lights
............................. 2-56
Fender
........................................ 6-59
Fog Lamps
................................ 2-54
Glow Plugs Light
........... 2-16, 2-81
Front ParkinglTurn Signal
........ 6-57
Indicator
..................................... 2-78
Headlights (See “Headlights”-)
Low Coolant Warning
.............. 2-81
Malfunction Indicator
.... 2-83, 6-66
Operation
................................... 2-43
Reading
..................................... 2-57
Service Fuel Filter
.................... 2-80
Side Marker
.............................. 6-58
Rear
................................. 6-62, 6-63
Replacement Chart
.................. 6-98
Roof Marker
.............................. 6-60
Tailgate Marker
......................... 6-60
Underhood Reel Lamp
............ 2-58
Loading Your Vehicle
........ 4-26, 6-67
Truck-Camper
............................ 6-70
Lubrication
..................................... 6-52
Accelerator Control System
.... 6-52
Body ........................................... 6-53
Constant Velocity Joints
......... 6-53
Front Axle
................................. 6-40
Front Shock Absorbers
........... 6-51
Front Suspension and Steering Linkage
................... 6-51
Service Engine Soon
..... 2-83, 6-66
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