1998 GMC SIERRA lock

Locking Rear Axle (If Equipped)
If you have this feature, your locking rear axle can give
you additional traction on snow, mud, ice, sand or
gravel. It works like a standard axle most of the time,
but when one
of the rear wheels has no traction and the
other does, this feature will allow
the wheel with
traction to move the vehicle.
Windows
Manual Windows Power Windows
(If Equipped)
Turn the
hand crank on each door to raise or lower
manual windows.
Regular and Extended Cab
2-32
ProCarManuals.com

Crew Cab
If you have the optional power windows, the controls
are on each of the side doors.
The driver’s door has a switch for the passenger
windows as well. Your power windows will work when
the ignition has been turned
to ACCESSORY or RUN. Press the rear
of the
switch with the power window
symbol on
it to lower the window.
Press the front of
the switch with the power window
symbol
on it to raise the window.
The driver’s window also has an express down feature
that allows the window to be lowered without holding
the switch. Press and hold the side of the window switch
marked
AUTO for one second to activate the express
down mode. The express down mode can be canceled at
any time by pressing the opposite side
of the switch. To
open the window partway, lightly tap the switch until the
window is at the desired position.
Lockout Switch (Crew Cab)
If you have a Crew Cab and power windows, the power
window switch has
a lockout feature. This feature
prevents the rear windows from operating when
the
front driver’s side switch is in LOCK. The windows can
still be operated using the driver’s window switch.
When the switch is moved
to NORM, the rear power
windows will operate again.
2-33
ProCarManuals.com

Swing-Out Windows (Extended Cab)
Sliding Rear Window (If Equipped)
To open the sliding rear window, unlock the latch lever
by moving the lever toward the front
of the cab. Release
the lever from the latch plate and slide the window
toward the driver’s side
of the vehicle.
To close the window, slide the window toward the
passenger’s side
of the vehicle. The latch lever will
automatically snap locked on to the latch plate. Try to
open the window without releasing the latch lever to be sure the window is
in the locked position.
Horn
On air bag-equipped vehicles, press the air bag module
in the center
of the steering wheel to sound the horn.
On vehicles not equipped with an air bag, press the pad
in the center of the steering wheel to sound the horn.
Tilt Wheel (If Equipped)
A tilt steering wheel allows
you to adjust the steering
wheel before
you drive.
You can also raise it to the highest level to give your
legs more room when you enter and exit the vehicle.
To tilt the wheel, hold the steering wheel and puli the
lever. Move the steering wheel to
a comfortable level,
then release the lever to lock the wheel
in place.
2-34
ProCarManuals.com

For steady wiping at low speed, turn the knob to the LOW
position. For high-speed wiping, turn the knob hrther, to
HIGH.
To stop the wipers, move the knob to OW.
Damaged wiper blades may prevent you from seeing
well enough to drive safely.
To avoid damage, be sure to
clear ice and
snow from the wiper blades before using
them.
If they are frozen to the windshield, carefully
loosen
or thaw them. If your blades do become
damaged, get new blades or blade inserts.
Heavy ice or snow can overload your wipers. The
windshield wiper motor
is protected from overload by a
circuit breaker and a fuse. If the motor overheats due
to
heavy snow, etc., the wiper will stop until the motor
cools. Although protected from electrical overload,
overload due
to heavy snow, etc. may cause wiper
linkage damage. Always clear ice and heavy snow from
the windshield before using your windshield wipers.
Windshield Washer
At the top of the lever,
%:.. there’s a paddle with the 4 g& .,.~ ...... ...... ... .. . . word PUSH on it. To spray
washer fluid
on the
windshield, push the paddle.
A CAU 1ION:
In freezing weather, don’t use your washer until
the windshield is warmed. Otherwise the washer
fluid can form ice on the windshield, blocking
your vision.
2-37
ProCarManuals.com

Clearance Lamps (If Equipped)
Taillamps License Plate Lamps
Instrument Panel Lights
Transfer Case Shift Indicator Light (Four-Wheel-Drive Vehicles)
Rotate the knob to the right again to the master
lighting symbol
to turn on all the lamps listed as
well as the headlamps.
Rotate the knob to the left,
to OFF, to turn off
your lamps.
Rotate the thumb wheel next to
the knob up to adjust
instrument panel lights. Rotate the thumb wheel
up to
the first notch to return the radio display and gearshift
indicator
LED display to full intensity when the
headlamps or parking lamps are on.
You can switch your headlamps from high
to low beams
by pulling on the turn signal/multifunction lever.
Headlamps On Reminder
A buzzer will sound when your headlamps are turned on
and the key
is turned to the OFF, LOCK or
ACCESSORY position.
If you need to use your
headlamps when the key is turned to OFF-
LOCK or ACCESSORY, the
buzzer can be turned off by turning
the thumb wheel next
to the parking lamp/headlamp
knob all the way down.
Daytime Running Lamps
Daytime Running Lamps (DRL) can make it easier for
others to see the front of your vehicle during the day.
DRL can be helpful
in many different driving
conditions, but they can be especially helpful
in the
short periods after dawn and before sunset.
The DRL system
will make your headlamps come on at
a reduced brightness when:
0 the ignition is on,
0 the headlamp switch is off and
the parking brake is released.
When the DRL are on, only your headlamps will be on.
The taillamps, sidemarker and other lamps won’t
be on.
Your instrument panel won’t be lit
up either.
When it begins to get dark, your DRL indicator light is a
reminder to turn your headlamp switch on. The other lamps
that come
on with your headlanips will also come on.
When you
turn off the headlamp switch, the regular
lamps will
go off, and your headlamps will change to
the reduced brightness of DRL.
2-42
ProCarManuals.com

’ NOTICE:
Holding a cigarette lighter in with your hand
while
it is heating can make it overload,
~ damaging the lighter and the heating element.
Just push the lighter all the way in and let go.
When it’s done,
it will pop back by itself.
Accessory Power Outlets
Two auxiliary power outlets are located near the
cigarette lighter. Use these outlets to power mobile
telephones or other devices designed to operate
with
vehicle electrical systems.
Sun Visors
To block out glare, you can swing down the visors. You
can also swing them
out to help block glare at the front
and side windows.
Your visor may have a strap
to hold small items, such
as maps.
Some visors have an extender on the inside edge. When
the visor is down, pull
the extender out for extra glare
coverage at the front
or side.
Some visors have mirrors with lamps.
If the mirror has
lamps, they will come on when
you lift the mirror cover.
2-59
ProCarManuals.com

A. Dome Lamp Switch
B. Lamp Controls
C. Air Outlets
D. Multifunction Lever
E. Instrument Cluster
F. Gearshift Lever
G. Audio System
H. Comfort Control System
I. Glove Box
J. Ashtray
K. Cupholder
L. Auxiliary Power Outlets
M. Storage Area or Compact Disc Player (If Equipped)
N. Rear Window Defogger Switch (If Equipped)
0. Passenger Air Bag Off Switch (If Equipped)
P. Electronic Transfer Case Switch (If Equipped)
Q. Tilt Lever (If Equipped)
R. Parking Brake Release
S. Hood Release
T. Fuse
Block
2-61
ProCarManuals.com

Instrument Panel Cluster
CHECK
GAGES SECURITY
MPH
lolololo1 TRIP loo 0 0 oolol
LOCK ANTI -
I APPLY BRAKE TO SHIFT FROM PARK I
United States version shown, Canada similar
Your instrument cluster is designed to let you know at a glance how your vehicle is running. You'll know how fast you're
going, about
how much fuel you have and many other things you'll need to know to drive safely and economically.
2-62
ProCarManuals.com