torque CHEVROLET SILVERADO 1999 1.G Owners Manual

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2-29
CAUTION:
Shifting the transfer case to NEUTRAL (N) can
cause your vehicle to roll even if the transmission
is in PARK (P), or if you have a manual
transmission, even if you are in gear. You or
someone else could be seriously injured. Be sure
to set the parking brake before placing the
transfer case in NEUTRAL (N). See ªParking
Brakeº in the Index.
NEUTRAL (N): Shift to this setting only when your
vehicle needs to be towed. The ignition switch must be
in the RUN position in order to shift the lever into
NEUTRAL (N). See ªRecreational Vehicle
TowingºorªTowing your vehicleºin the Index.
4
-Wheel Low (4L): This setting also engages your
front axle and delivers extra torque. You may never need
4LO. It sends maximum power to all four wheels. You
might choose 4LO if you are driving off
-road in deep
sand, deep mud, deep snow and climbing or descending
steep hills.You can shift from 2
-Wheel High (2H) to 4-Wheel High
(4H) or from 4
-Wheel High (4H) to 2-Wheel High (2H)
while the vehicle is moving. Your front axle will engage
faster if you take your foot off of the accelerator for a
couple of seconds after you shift. In extremely cold
weather, it may be necessary to stop or slow the vehicle
to shift into 4
-Wheel High (4H).
To shift into or out of 4
-Wheel Low (4L) or
NEUTRAL (N):
1. Slow the vehicle to a roll, about 1 to 3 mph
(2 to 5 km/h) and shift an automatic transmission
into NEUTRAL (N), or with a manual transmission,
press the clutch pedal.
2. Shift the transfer case shift lever in one
continuous motion.
Don't pause in NEUTRAL (N) as you shift the transfer
case into 4
-Wheel Low (4L), or your gears could clash.
Remember that driving in 4
-Wheel High (4H) or
4
-Wheel Low (4L) may reduce fuel economy. Also,
driving in four
-wheel drive on dry pavement could
cause your tires to wear faster and make your transfer
case harder to shift and run noisier.

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2-31
4HI: Use 4HI when you need extra traction, such as on
snowy or icy roads or in most off
-road situations. This
setting also engages your front axle to help drive your
vehicle. This is the best setting to use when plowing snow.
4LO: This setting also engages your front axle and
delivers extra torque. You may never need 4LO. It sends
maximum power to all four wheels. You might choose
4LO if you are driving off
-road in deep sand, deep mud,
deep snow and climbing or descending steep hills.
CAUTION:
Shifting the transfer case to NEUTRAL can
cause your vehicle to roll even if the transmission
is in PARK (P). You or someone else could be
seriously injured. Be sure to set the parking
brake before placing the transfer case in
NEUTRAL. See ªParking Brakeº in the Index.
NEUTRAL: Shift the vehicle's transfer case to neutral
only when towing your vehicle. See ªRecreational
Vehicle Towingº or ªTowing Your Vehicleº in the Index
for more information.Indicator lights in the switches show which setting you
are in. The indicator lights will come on briefly when
you turn on the ignition and one will stay on. If the
lights do not come on, you should take your vehicle to
your dealer for service. An indicator light will flash
while shifting the transfer case. It will remain
illuminated when the shift is complete. If for some
reason the transfer case cannot make a requested shift, it
will return to the last chosen setting.
If the SERVICE 4WD light stays on, you should take
your vehicle to your dealer for service. See ªService
4WDº in the Index for further information.
Shifting to 4HI or AUTO 4WD
Press and release the 4HI or AUTO 4WD switch. This
can be done at any speed (except when shifting from
4LO), and the indicator light will flash while shifting. It
will remain illuminated when the shift is completed.
Shifting to 2HI
Press and release the 2HI switch. This can be done at
any speed (except when shifting from 4LO).

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2-37
If you have to leave your vehicle with the engine
running, be sure your vehicle is in PARK (P) and the
parking brake is firmly set before you leave it. After you
move the shift lever into PARK (P), hold the regular
brake pedal down. Then, see if you can move the shift
lever away from PARK (P) without first pulling it
toward you. If you can, it means that the shift lever
wasn't fully locked into PARK (P).
Torque Lock (Automatic Transmission)
If you are parking on a hill and you don't shift your
transmission into PARK (P) properly, the weight of the
vehicle may put too much force on the parking pawl in
the transmission. You may find it difficult to pull the
shift lever out of PARK (P). This is called ªtorque lock.º
To prevent torque lock, set the parking brake and then
shift into PARK (P) properly before you leave the
driver's seat. To find out how, see ªShifting Into
PARK (P)º in the Index.
When you are ready to drive, move the shift lever out of
PARK (P) before you release the parking brake.
If torque lock does occur, you may need to have another
vehicle push yours a little uphill to take some of the
pressure from the parking pawl in the transmission, so
you can pull the shift lever out of PARK (P).
Shifting Out of PARK (P)
(Automatic Transmission Only)
CAUTION:
Before shifting out of PARK (P) you must fully
apply your regular brakes. Your vehicle can roll.
If you have left the engine running, the vehicle
can move suddenly. You or others could be
injured. If you're pulling a trailer, see ªTowing a
Trailerº in the Index.
Your vehicle has a brake-transmission shift interlock
system. You have to fully apply your regular brakes
before you can shift from PARK (P) when the ignition is
in RUN. See ªAutomatic Transmissionº in the Index.
If you cannot shift out of PARK (P), ease pressure on
the shift lever and push the shift lever all the way up
into PARK (P) as you maintain brake application. Then,
move the shift lever into the gear you want.

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5-30
8. Tighten the nuts firmly in a crisscross sequence as
shown by turning the wheel wrench clockwise.
CAUTION:
Incorrect wheel nuts or improperly tightened
wheel nuts can cause the wheel to become loose
and even come off. This could lead to an accident.
Be sure to use the correct wheel nuts. If you have
to replace them, be sure to get new GM original
equipment wheel nuts.
Stop somewhere as soon as you can and have the
nuts tightened with a torque wrench to the
proper torque. See ªCapacities and
Specificationsº in the Index.
NOTICE:
Improperly tightened wheel nuts can lead to
brake pulsation and rotor damage. To avoid
expensive brake repairs, evenly tighten the wheel
nuts in the proper sequence and to the proper
torque specification.

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6-37
Some driving conditions or climates may cause a brake
squeal when the brakes are first applied or lightly
applied. This does not mean something is wrong with
your brakes.
Properly torqued wheel nuts are necessary to help
prevent brake pulsation. When tires are rotated, inspect
brake pads for wear and evenly torque wheel nuts in the
proper sequence to GM specifications.
Brake linings should always be replaced as complete
axle sets.
See ªBrake System Inspectionº in Section 7 of this manual
under Part C ªPeriodic Maintenance Inspections.º
Brake Pedal Travel
See your dealer if the brake pedal does not return to
normal height, or if there is a rapid increase in pedal
travel. This could be a sign of brake trouble.
Brake Adjustment
Every time you make a brake stop, your disc brakes
adjust for wear.
Replacing Brake System Parts
The braking system on a vehicle is complex. Its many
parts have to be of top quality and work well together if
the vehicle is to have really good braking. Your vehicle
was designed and tested with top
-quality GM brake
parts. When you replace parts of your braking
system
-- for example, when your brake linings wear
down and you have to have new ones put in
-- be sure
you get new approved GM replacement parts. If you
don't, your brakes may no longer work properly. For
example, if someone puts in brake linings that are wrong
for your vehicle, the balance between your front and
rear brakes can change
-- for the worse. The braking
performance you've come to expect can change in many
other ways if someone puts in the wrong replacement
brake parts.
Battery
Your new vehicle comes with an ACDelco Freedom

battery. When it's time for a new battery, we recommend
an ACDelco Freedom battery. Get one that has the
replacement number shown on the original battery's label.

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6-47 Tire Inspection and Rotation
Tires should be rotated every 6,000 to 8,000 miles
(10 000 to 13 000 km). Any time you notice unusual
wear, rotate your tires as soon as possible and check
wheel alignment. Also check for damaged tires or
wheels. See ªWhen It's Time for New Tiresº and
ªWheel Replacementº later in this section for
more information.
The purpose of regular rotation is to achieve more
uniform wear for all tires on the vehicle. The first
rotation is the most important. See ªScheduled
Maintenance Servicesº in the Index for scheduled
rotation intervals.
When rotating your tires, always use one of the correct
rotation patterns shown here.
After the tires have been rotated, adjust the front and rear
inflation pressures as shown on the Certification/Tire label.
Make certain that all wheel nuts are properly tightened.
See ªWheel Nut Torqueº in the Index.
CAUTION:
Rust or dirt on a wheel, or on the parts to which
it is fastened, can make wheel nuts become loose
after a time. The wheel could come off and cause
an accident. When you change a wheel, remove
any rust or dirt from places where the wheel
attaches to the vehicle. In an emergency, you can
use a cloth or a paper towel to do this; but be
sure to use a scraper or wire brush later, if you
need to, to get all the rust or dirt off. (See
ªChanging a Flat Tireº in the Index.)

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6-74
Capacities and Specifications
Please refer to ªRecommended Fluids and Lubricantsº in the Index for more information.
Engine Type VIN Code Spark Plug Gap
VORTEC 4300 V6 W 0.060 inches (1.52 mm)
VORTEC 4800 V8 V 0.060 inches (1.52 mm)
VORTEC 5300 V8 T 0.060 inches (1.52 mm)
VORTEC 6000 V8 U 0.060 inches (1.52 mm)
Wheels and Tires
Model Description Torque
C/K 1500 6 bolts (14mm)
140 lb
-ft (190 N´m)
C/K 2500 8 bolts (14mm)
140 lb
-ft (190 N´m)
Tire Pressure See the Certification/Tire label on the rear edge of the driver's door
or the incomplete vehicle document in the cab.

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Treadwear 6-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Uniform Quality Grading 6-50 . . . . . . . . . . . . . . . . . . . . . . .
Wear Indicators 6-48 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wheel Replacement 6-51 . . . . . . . . . . . . . . . . . . . . . . . . . . .
When It's Time for New 6-48 . . . . . . . . . . . . . . . . . . . . . . .
Top Strap 1-52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Torque Lock 2-37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Torque, Wheel Nut 5-30, 6-74 . . . . . . . . . . . . . . . . . . . . . . . . .
Total Vehicle Reserve Capacity 4-49 . . . . . . . . . . . . . . . . . . . .
Tow/Haul Light 2-81 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tow/Haul Mode 2-23, 4-55 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Towing
Trailer 4
-53 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Recreational Vehicle 4-44 . . . . . . . . . . . . . . . . . . . . . . . . . .
Your Vehicle 5-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trailer
Brakes 4
-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Driving on Grades 4-62 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Driving with 4-61 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hitches 4-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance When Towing 4-64 . . . . . . . . . . . . . . . . . . . . .
Parking on Hills 4-63 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Chains 4-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tongue Weight 4-59 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total Weight on Tires 4-57 . . . . . . . . . . . . . . . . . . . . . . . . . .
Towing 4-53 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Turn Signals 4-62 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Weight 4-56 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring Harness 4-65 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trans Fluid Hot Message 2-82 . . . . . . . . . . . . . . . . . . . . . . . . . Trans Hot....Idle Engine Message 2
-83 . . . . . . . . . . . . . . . . . .
Transfer Case, Automatic 2-30 . . . . . . . . . . . . . . . . . . . . . . . . .
Transfer Case Lubricant 6-26, 7-26 . . . . . . . . . . . . . . . . . . . . .
Transfer Case, Manual 2-28 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transmission Fluid
Automatic 6
-19, 7-25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manual 6-22, 7-25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transmission Temperature Gage 2-75 . . . . . . . . . . . . . . . . . . .
Transmitters, Keyless Entry 2-6 . . . . . . . . . . . . . . . . . . . . . . . .
Transportation, Courtesy 8-8 . . . . . . . . . . . . . . . . . . . . . . . . . .
Trip Odometer 2-69 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TTY Users 8-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Turn Signal and Lane Change Signals 2-45 . . . . . . . . . . . . . . .
Turn Signal/Multifunction Lever 2-44 . . . . . . . . . . . . . . . . . . .
Turn Signals When Towing a Trailer 4-62 . . . . . . . . . . . . . . . .
Underbody Flushing Service 7-22 . . . . . . . . . . . . . . . . . . . . .
Underbody Maintenance 6-61 . . . . . . . . . . . . . . . . . . . . . . . . .
Underhood Electrical Center 6-69 . . . . . . . . . . . . . . . . . . . . . .
Vehicle
Control 4-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Damage Warnings iv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Identification Number 6
-63 . . . . . . . . . . . . . . . . . . . . . . . . .
Loading 4-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage 6-38 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ventilation System 3-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Visors, Sun 2-65 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltmeter 2-73 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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9-12
Warning Devices 5-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warning Lights, Gages and Indicators 2-70 . . . . . . . . . . . . . . .
Warranty Information 8-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Washer Fluid, Windshield 6-33, 7-25 . . . . . . . . . . . . . . . . . . .
Washing Your Vehicle 6-58 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Weatherstrip Lubrication 7-19 . . . . . . . . . . . . . . . . . . . . . . . . .
Weatherstrips 6-57 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wheel
Alignment 6
-51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Nut Torque 5-30, 6-74 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacement 6-51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wrench 5-22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Windows 2-42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manual 2-42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power 2-42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sliding Rear 2-43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Swing-Out 2-43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Windshield Washer 2
-47 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fluid 2-47, 6-33, 7-25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fluid Level Check 7-18 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Windshield Wipers 2-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Blade Replacement 6-44, 6-77 . . . . . . . . . . . . . . . . . . . . . .
Cleaning the Blades 6-57 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuses 6-64 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Winter Driving 4-40 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiper Blade Check 7-19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiper Blades, Cleaning 6-57 . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring, Trailer 4-65 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring Harness, Instrument Panel Jumper 4-69 . . . . . . . . . . . .
Wrench, Wheel 5-22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .