1999 CHEVROLET C/K tire pressure

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6-51 Inflation -- Tire Pressure
The Certification/Tire label, which is on the rear edge of
the driver's door, or on the incomplete vehicle document
in the cab, shows the correct inflation pressures for your
tires when they're cold. ªColdº means your vehicle has
been sitting for at least three hours or driven no more
than 1 mile (1.6 km).NOTICE:
Don't let anyone tell you that underinflation or
overinflation is all right. It's not. If your tires
don't have enough air (underinflation), you can
get the following:

Too much flexing

Too much heat

Tire overloading

Bad wear

Bad handling

Bad fuel economy.
If your tires have too much air (overinflation),
you can get the following:

Unusual wear

Bad handling

Rough ride

Needless damage from road hazards.

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6-52
When to Check
Check your tires once a month or more. Also, check the
tire pressure of the spare tire.
How to Check
Use a good quality pocket
-type gage to check tire
pressure. You can't tell if your tires are properly inflated
simply by looking at them. Radial tires may look
properly inflated even when they're underinflated.
Be sure to put the valve caps back on the valve
stems. They help prevent leaks by keeping out dirt
and moisture.
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. If your vehicle has dual rear wheels, also
see ªDual Tire Operationº later in this section.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.
If your vehicle has single rear wheels, always use one of
the correct rotation patterns shown here when rotating
your tires.
If your vehicle has front tires with different load ranges
or tread designs (such as all season vs. on/off road) than
the rear tires, don't rotate your tires front to rear.

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6-53
If your vehicle has dual rear wheels and the load range
and tread design for your front tires is the same as your
rear tires, always use one of the correct rotation patterns
shown here when rotating your tires.
If your vehicle has dual rear
wheels and the load range
or tread design for your
front tires is different from
your rear tires, always use
the correct rotation pattern
shown here when rotating
your tires.
The dual tires are rotated as a pair, and the inside rear
tires become the outside rear tires.
When you install dual wheels, be sure the vent holes in
the inner and outer wheels on each side are lined up.
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.

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6-55 Dual Tire Operation
When the vehicle is new, or whenever a wheel, wheel
bolt or wheel nut is replaced, check the wheel nut torque
after 100, 1,000 and 6,000 miles (160, 1 600 and
10 000 km) of driving. For proper torque, see ªWheel
Nut Torqueº in the Index.
The outer tire on a dual wheel setup generally wears
faster than the inner tire. Your tires will wear more
evenly and last longer if you rotate the tires periodically.
If you're going to be doing a lot of driving on
high
-crown roads, you can reduce tire wear by adding
5 psi (35 kPa) to the tire pressure in the outer tires.
Be sure to return to the recommended pressures when no
longer driving under those conditions. See ªChanging a
Flat Tireº in the Index for more information.
CAUTION:
If you operate your vehicle with a tire that is
badly underinflated, the tire can overheat. An
overheated tire can lose air suddenly or catch
fire. You or others could be injured. Be sure
all tires (including the spare, if any) are
properly inflated.
Buying New Tires
To find out what kind and size of tires you need, look at
the Certification/Tire label.
The tires installed on your vehicle when it was new had
a Tire Performance Criteria Specification (TPC Spec)
number on each tire's sidewall. When you get new tires,
get ones with that same TPC Spec number. That way
your vehicle will continue to have tires that are designed
to give proper endurance, handling, speed rating,
traction, ride and other things during normal service on
your vehicle. If your tires have an all
-season tread
design, the TPC number will be followed by an ªMSº
(for mud and snow).

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6-76
Capacities and Specifications
Please refer to ªRecommended Fluids and Lubricantsº in the Index for more information.
Engine Type VIN Code Spark Plug Gap
ªVORTECº 5000 V8 M 0.06 inches (1.52 mm)
ªVORTECº 5700 V8 R 0.06 inches (1.52 mm)
ªVORTECº 7400 V8 J 0.06 inches (1.52 mm)
Wheels and Tires
Model Description Torque
C/K 1500 5 bolts (14 mm)
140 lb
-ft (190 N´m)
C/K 1500 and C/K 2500 6 bolts (14 mm)
140 lb
-ft (190 N´m)
C/K 2500 (w/C6P) 8 bolts (14 mm)
140 lb
-ft (190 N´m)
C/K 3500 (Single Rear Wheels) 8 bolts (14 mm)
140 lb
-ft (190 N´m)
C/K 3500 (Dual Rear Wheels) 8 bolts (14 mm)
140 lb
-ft (190 N´m)
C 3500 HD Front 5 bolts (5/8 in.)
175 lb
-ft (240 N´m)
C 3500 HD Rear 10 bolts (5/8 in.)
175 lb
-ft (240 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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7-41
Part B: Owner Checks and Services
Listed in this part are owner checks and services which
should be performed at the intervals specified to help
ensure the safety, dependability and emission control
performance of your vehicle.
Be sure any necessary repairs are completed at once.
Whenever any fluids or lubricants are added to your
vehicle, make sure they are the proper ones, as shown in
Part D.
At the First 100, 1,000 and 6,000 Miles
(160, 1 600 and 10 000 km)
For vehicles with dual wheels, check dual wheel nut
torque. For proper torque, see ªWheel Nut Torqueº in
the Index.
At Each Fuel Fill
It is important for you or a service station attendant to
perform these underhood checks at each fuel fill.
Engine Oil Level Check
Check the engine oil level and add the proper oil if
necessary. See ªEngine Oilº in the Index for
further details.Engine Coolant Level Check
Check the engine coolant level and add DEX
-COOL

coolant mixture if necessary. See ªEngine Coolantº in
the Index for further details.
Windshield Washer Fluid Level Check
Check the windshield washer fluid level in the
windshield washer tank and add the proper fluid if
necessary. See ªWindshield Washer Fluidº in the Index
for further details.
At Least Once a Month
Tire Inflation Check
Make sure tires are inflated to the correct pressures.
See ªTiresº in the Index for further details.
Cassette Deck Service
Clean cassette deck. Cleaning should be done every
50 hours of tape play. See ªAudio Systemsº in the
Index for further details.

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9-4
Easy Entry Seat 1-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Equipment, Adding 2-13, 3-27, 6-69 . . . . . . . . . . .
Electrical System 6-69 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrochromic Day/Night Rearview Mirror 2-45 . . . . . . . . . .
Engine 6-10, 6-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Cleaner/Filter 6-17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Coolant 6-28, 6-76, 7-48 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Coolant Heater 2-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Coolant Level Check 7-41 . . . . . . . . . . . . . . . . . . . . . . . . . .
Coolant Temperature Gage 2-69 . . . . . . . . . . . . . . . . . . . . .
Cooling System Capacity 6-77 . . . . . . . . . . . . . . . . . . . . . . .
Exhaust 2-31, 4-40 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuse Blocks 6-70, 6-73 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Identification 6-69 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Level Check 7-41 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overheating 5-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Running While Parked 2-31 . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications 6-76 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Starting Your 2-13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Underhood Fuse/Relay Center 6-73 . . . . . . . . . . . . . . . . . . .
Engine Oil 6-13, 7-48 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adding 6-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Additives 6-16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking 6-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pressure Gage 2-72 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Used 6-17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
When to Change 6-16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exhaust, Engine 2-30, 4-40 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fabric Cleaning 6-61 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fan Control, Climate Control System 3-2, 3-3 . . . . . . . . . . . .
Fender Marker Lamp Bulb Replacement 6-44 . . . . . . . . . . . . .
Filling a Portable Fuel Container 6-8 . . . . . . . . . . . . . . . . . . . .
Filling Your Tank 6-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Filter, Air 6-17, 6-78 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Finish Care 6-65 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Finish Damage 6-67 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flashers, Hazard Warning 5-2 . . . . . . . . . . . . . . . . . . . . . . . . .
Flat Tire, Changing 5-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fluid Capacities 6-77 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fluids and Lubricants 7-48 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Foreign Countries, Fuel 6-5 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Four-Wheel Drive 2-21, 6-26 . . . . . . . . . . . . . . . . . . . . . . . . .
French Language Manual ii. . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Axle 6
-27, 7-49 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Axle Locking Feature 2-22 . . . . . . . . . . . . . . . . . . . . . . .
Front Towing 5-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Turn Signal Lamp Bulb Replacement 6-41, 6-42 . . . . .
Fuel 6-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Filling a Portable Container 6-8 . . . . . . . . . . . . . . . . . . . . . .
Filling Your Tank 6-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gage 2-75 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In Foreign Countries 6-5 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tank Capacity 6-77 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuses and Circuit Breakers 6-70 . . . . . . . . . . . . . . . . . . . . . . .
Fusible Links 6-70 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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9-5
Gages
Engine Coolant Temperature 2-69 . . . . . . . . . . . . . . . . . . . .
Engine Oil Pressure 2-72 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel 2-75 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Speedometer 2-63 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tachometer 2-63 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltmeter 2-67 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Garage Door Opener 2-51 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GAWR 4-43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gear Positions, Automatic Transmission 2-16 . . . . . . . . . . . . .
Gear Positions, Manual Transmission 2-19, 2-20 . . . . . . . . . .
Glove Box 2-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GM Mobility Program for Persons with Disabilities 8-5 . . . . .
GM Vehicle Care/Appearance Materials 6-68 . . . . . . . . . . . . .
Gross Axle Weight Rating 4-43 . . . . . . . . . . . . . . . . . . . . . . . .
Gross Vehicle Weight Rating 4-43 . . . . . . . . . . . . . . . . . . . . . .
Guide en Fran†ais ii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GVWR 4
-43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Halogen Bulbs 6-39 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hazard Warning Flashers 5-2 . . . . . . . . . . . . . . . . . . . . . . . . . .
Head Restraints 1-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Headlamps 2-41 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bulb Replacement 6-39, 6-40 . . . . . . . . . . . . . . . . . . . . . . .
High/Low Beam Changer 2-36 . . . . . . . . . . . . . . . . . . . . . .
On Reminder 2-41 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring 6-70 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hearing Impaired, Customer Assistance 8-4 . . . . . . . . . . . . . .
Heating 3-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
High-Beam Headlamps 2-36 . . . . . . . . . . . . . . . . . . . . . . . . . .
Highway Hypnosis 4-33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Hill and Mountain Roads 4
-34 . . . . . . . . . . . . . . . . . . . . . . . . .
Hitches, Trailer 4-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hood
Checking Things Under 6
-8 . . . . . . . . . . . . . . . . . . . . . . . . .
Release 6-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Horn 2-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hydraulic Clutch Fluid 6-24, 7-48 . . . . . . . . . . . . . . . . . . . . . .
Hydraulic Clutch System Check 7-42 . . . . . . . . . . . . . . . . . . .
Hydroplaning 4-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ignition Positions 2-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ignition Transmission Lock Check 7-44 . . . . . . . . . . . . . . . . .
Illuminated Entry 2-42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inflation, Tire 6-51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inside Day/Night Rearview Mirror 2-44 . . . . . . . . . . . . . . . . .
Inspections 7-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brake System 7-47 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Drive Axle 7-47 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exhaust Systems 7-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Radiator and Heater Hose 7-46 . . . . . . . . . . . . . . . . . . . . . .
Steering 7-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Suspension 7-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Throttle Linkage 7-47 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transfer Case (Four-Wheel Drive) 7-47 . . . . . . . . . . . . . . .
Instrument Panel 2-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning 6-63 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cluster 2-62 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuse Block 6-71 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Intensity Control 2-42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interior Lamps 2-42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .