air suspension CHEVROLET SILVERADO 1999 1.G Owners Manual

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4-30 After Off-Road Driving
Remove any brush or debris that has collected on the
underbody, chassis or under the hood. These
accumulations can be a fire hazard.
After operation in mud or sand, have the brake linings
cleaned and checked. These substances can cause
glazing and uneven braking. Check the body structure,
steering, suspension, wheels, tires and exhaust system
for damage. Also, check the fuel lines and cooling
system for any leakage.
Your vehicle will require more frequent service due to
off
-road use. Refer to the Maintenance Schedule for
additional information.
Driving at Night
Night driving is more dangerous than day driving. One
reason is that some drivers are likely to be impaired
-- by
alcohol or drugs, with night vision problems, or by fatigue.

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Scheduled Maintenance -- Gasoline Engines
7-5
The services shown in this schedule up to 100,000 miles
(166 000 km) should be performed after 100,000 miles
(166 000 km) at the same intervals. The services
shown at 150,000 miles (240 000 km) and
200,000 miles (332 000 km) should be performed at the
same intervals after 150,000 miles (240 000 km) and
200,000 miles (332 000 km).
See ªOwner Checks and Servicesº and ªPeriodic
Maintenance Inspectionsº following.Footnotes

The U.S. Environmental Protection Agency or the
California Air Resources Board has determined that the
failure to perform this maintenance item will not nullify
the emission warranty or limit recall liability prior to the
completion of the vehicle's useful life. We, however,
urge that all recommended maintenance services be
performed at the indicated intervals and the maintenance
be recorded.
# Lubricate the front suspension, ball joints, steering
linkage, transmission shift linkage, transfer case shift
linkage, parking brake cable guides, and brake front
axle. Ball joints should not be lubricated unless their
temperature is 10F (
-12C) or higher, or they could
be damaged.

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7-23
Part C: Periodic Maintenance
Inspections
Listed in this part are inspections and services which
should be performed at least twice a year (for instance,
each spring and fall). You should let your dealer's
service department or other qualified service center do
these jobs. Make sure any necessary repairs are
completed at once.
Proper procedures to perform these services may be
found in a service manual. See ªService and Owner
Publicationsº in the Index.
Steering and Suspension Inspection
Inspect the front and rear suspension and steering
system for damaged, loose or missing parts, signs of
wear or lack of lubrication. Inspect the power steering
lines and hoses for proper hook
-up, binding, leaks,
cracks, chafing, etc.
Exhaust System Inspection
Inspect the complete exhaust system. Inspect the body
near the exhaust system. Look for broken, damaged,
missing or out
-of-position parts as well as open seams,
holes, loose connections or other conditions which could
cause a heat build
-up in the floor pan or could let
exhaust fumes into the vehicle. See ªEngine Exhaustº in
the Index.
Engine Cooling System Inspection
Inspect the hoses and have them replaced if they are
cracked, swollen or deteriorated. Inspect all pipes,
fittings and clamps; replace as needed. Clean the outside
of the radiator and air conditioning condenser. To help
ensure proper operation, a pressure test of the cooling
system and pressure cap is recommended at least
once a year.

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8-12
CURRENT PUBLICATIONS FOR 1999 CHEVROLET
SERVICE MANUALS
Service Manuals have the diagnosis and repair information
on engines, transmission, axle, suspension, brakes,
electrical, steering, body, etc.
RETAIL SELL PRICE: $90.00
TRANSMISSION, TRANSAXLE, TRANSFER CASE
UNIT REPAIR MANUAL
This manual provides information on unit repair service
procedures, adjustments and specifications for the
1999 GM transmissions, transaxles and transfer cases.
RETAIL SELL PRICE: $50.00
SERVICE BULLETINS
Service Bulletins give technical service information needed
to knowledgeably service General Motors cars and trucks.
Each bulletin contains instructions to assist in the
diagnosis and service of your vehicle.OWNER'S INFORMATION
Owner publications are written directly for Owners and
intended to provide basic operational information about the
vehicle. The owner's manual will include the Maintenance
Schedule for all models.
In-Portfolio: Includes a Portfolio, Owner's Manual and
Warranty Booklet.
RETAIL SELL PRICE: $20.00
Without Portfolio: Owner's Manual only.
RETAIL SELL PRICE: $15.00
CURRENT & PAST MODEL ORDER FORMS
Service Publications are available for current and past
model GM vehicles. To request an order form, please
specify year and model name of the vehicle.
PLEASE COMPLETE THE ORDER FORM SHOWN ON
THE FOLLOWING PAGE AND MAIL TO:
Helm, Incorporated
P.O. Box 07130
Detroit, MI 48207OR ORDER TOLL FREE: 1-800-551-4123
Monday-Friday 8:00 AM ± 6:00 PM Eastern Time
For Credit Card Orders Only (VISA±MasterCard±Discover)
1999 CHEVROLET SERVICE PUBLICATIONS ORDERING INFORMATION
The following publications covering the operation and servicing of your vehicle can be purchased by filling out
the Service Publication Order Form in this book and mailing it in with your check, money order,
or credit card information to Helm, Incorporated (address below.)

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9-6
Inspections (Continued)
Steering 7-23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Suspension 7-23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Throttle System 7-24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transfer Case (Four-Wheel Drive) 7-24 . . . . . . . . . . . . . . .
Instrument Panel 2-66 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning 6-56 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cluster 2-66 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuse Block 6-65 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Intensity Control 2-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Jumper Wiring Harness 4-69 . . . . . . . . . . . . . . . . . . . . . . . .
Interior Lamps 2-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Jack, Tire 5-22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Jump Starting 5-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Key Lock Cylinders Service 7-20 . . . . . . . . . . . . . . . . . . . . .
Key Release Button 2-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Keyless Entry System 2-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Keys 2-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Labels
Certification 4-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Certification/Tire 4-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Parts Identification 6-63 . . . . . . . . . . . . . . . . . . . . .
Vehicle Identification Number 6-63 . . . . . . . . . . . . . . . . . . .
Lamps 2-51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cargo 2-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning 6-58 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dome 2-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exterior 2-51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Interior 2
-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
On Reminder 2-52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Latches, Seatback 1-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Leaving Your Vehicle with the Engine Running 2-36 . . . . . . .
Lighter 2-64 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lights
4WD 2
-80 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Bag Off 1-33, 2-71 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Bag Readiness 1-27, 2-71 . . . . . . . . . . . . . . . . . . . . . . .
Anti-Lock Brake System Warning 2-74, 4-7 . . . . . . . . . . . .
Brake System Warning 2-74 . . . . . . . . . . . . . . . . . . . . . . . . .
Cruise 2-80 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Belt Reminder 1-12, 2-70 . . . . . . . . . . . . . . . . . . . . .
Service Engine Soon 2-77 . . . . . . . . . . . . . . . . . . . . . . . . . .
Shift 2-27, 2-73 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tow/Haul 2-81 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loading Information, Truck-Camper 4-50 . . . . . . . . . . . . . . .
Loading Your Vehicle 4-46 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loading Your Vehicle for Off-Road Driving 4-17 . . . . . . . . . .
Lockout Prevention 2-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Locks
Cylinders 7
-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Door 2-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ignition Transmission Check 7-22 . . . . . . . . . . . . . . . . . . . .
Key Lock Cylinders Service 7-20 . . . . . . . . . . . . . . . . . . . .
Power Door 2-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Low Coolant Message 2-84, 6-31 . . . . . . . . . . . . . . . . . . . . . .
Low Fuel Message 2-87 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Low Washer Fluid Message 2-87 . . . . . . . . . . . . . . . . . . . . . . .
Lubricants and Fluids 7-25 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lubrication Service, Body 7-20 . . . . . . . . . . . . . . . . . . . . . . . .
Lumbar Controls, Manual 1-3 . . . . . . . . . . . . . . . . . . . . . . . . .
Lumbar Controls, Power 1-5 . . . . . . . . . . . . . . . . . . . . . . . . . .