1999 CHEVROLET TAHOE lock

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7-39
Also look for any opened or broken air bag coverings,
and have them repaired or replaced. (The air bag system
does not need regular maintenance.)
Wiper Blade Check
Inspect wiper blades for wear or cracking. Replace blade
inserts that appear worn or damaged or that streak or
miss areas of the windshield. Also see ªWiper Blades,
Cleaningº in the Index.
Air Cleaner Filter Restriction Indicator Check
Your vehicle has an indicator on the engine that lets you
know when the air cleaner filter is dirty and needs to be
changed. Check indicator at least twice a year or when
your oil is changed, whichever occurs first. See ªAir
Cleanerº in the Index for more information. Inspect your
air cleaner filter restriction indicator more often if the
vehicle is used in dusty areas or under off road conditions.
Weatherstrip Lubrication
Silicone grease on weatherstrips will make them last
longer, seal better, and not stick or squeak. Apply
silicone grease with a clean cloth. During very cold,
damp weather more frequent application may be
required. (See ªRecommended Fluids and Lubricantsº
in the Index.)Automatic Transmission Check
Check the transmission fluid level; add if needed. See
ªAutomatic Transmission Fluidº in the Index. A fluid
loss may indicate a problem. Check the system and
repair if needed.
At Least Once a Year
Key Lock Cylinders Service
Lubricate the key lock cylinders with the lubricant
specified in Part D.
Body Lubrication Service
Lubricate all body hood, body door hinges, body door
hinge pins, hood latch assembly, secondary hood latch,
pivots, spring anchor, release pawl, rear compartment
hinges, outer tailgate handle pivot points, latches,
tailgate hinge, tailgate linkage, fuel door hinge, locks
and folding seat hardware. Part D tells you what to use.
More frequent lubrication may be required when
exposed to a corrosive environment.

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7-40
Starter Switch Check
CAUTION:
When you are doing this check, the vehicle could
move suddenly. If it does, you or others could be
injured. Follow the steps below.
1. Before you start, be sure you have enough room
around the vehicle.
2. Firmly apply both the parking brake (see ªParking
Brakeº in the Index if necessary) and the
regular brake.
NOTE: Do not use the accelerator pedal, and be
ready to turn off the engine immediately if it starts.
3. Try to start the engine in each gear. The starter
should work only in PARK (P) or NEUTRAL (N). If
the starter works in any other position, your vehicle
needs service.Brake
-Transmission Shift Interlock (BTSI) Check
CAUTION:
When you are doing this check, the vehicle could
move suddenly. If it does, you or others could be
injured. Follow the steps below.
1. Before you start, be sure you have enough room
around the vehicle. It should be parked on a
level surface.
2. Firmly apply the parking brake (see ªParking Brakeº
in the Index if necessary).
NOTE: Be ready to apply the regular brake
immediately if the vehicle begins to move.
3. With the engine off, turn the key to the RUN
position, but don't start the engine. Without applying
the regular brake, try to move the shift lever out of
PARK (P) with normal effort. If the shift lever
moves out of PARK (P), your vehicle's BTSI
needs service.

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7-41
Ignition Transmission Lock Check
While parked, and with the parking brake set, try to turn
the ignition key to LOCK in each shift lever position.

The key should turn to LOCK only when the shift
lever is in PARK (P).

The key should come out only in LOCK.
Parking Brake and Automatic Transmission
PARK (P) Mechanism Check
CAUTION:
When you are doing this check, your vehicle
could begin to move. You or others could be
injured and property could be damaged. Make
sure there is room in front of your vehicle in case
it begins to roll. Be ready to apply the regular
brake at once should the vehicle begin to move.
Park on a fairly steep hill, with the vehicle facing
downhill. Keeping your foot on the regular brake, set the
parking brake.

To check the parking brake's holding ability:
With the engine running and transmission in
NEUTRAL (N), slowly remove foot pressure from
the regular brake pedal. Do this until the vehicle is
held by the parking brake only.

To check the PARK (P) mechanism's holding ability:
With the engine running, shift to PARK (P). Then
release all brakes.
Underbody Flushing Service
At least every spring, use plain water to flush any
corrosive materials from the underbody. Take care to
clean thoroughly any areas where mud and other debris
can collect.

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7-44
Part D: Recommended Fluids
and Lubricants
NOTE: Fluids and lubricants identified below by name, part
number or specification may be obtained from your dealer.
USAGE
FLUID/LUBRICANT
Engine Oil
(Gasoline
Engine)Engine Oil with the American
Petroleum Institute Certified For
Gasoline Engines ªStarburstº
symbol of the proper viscosity. To
determine the preferred viscosity
for your vehicle's engine, see
ªEngine Oilº in the Index.
Engine Coolant50/50 mixture of clean, drinkable
water and use only GM
Goodwrench

DEX-COOL
or
Havoline
DEX-COOL
Coolant.
See ªEngine Coolantº in the Index.
Hydraulic Brake
SystemDelco Supreme 11
Brake Fluid
(GM Part No. 12377967 or
equivalent DOT
-3 Brake Fluid).
Windshield
Washer SolventGM Optikleen
Washer Solvent
(GM Part No. 1051515)
or equivalent.
USAGEFLUID/LUBRICANT
Parking Brake
Cable GuidesChassis Lubricant (GM Part
No. 12377985 or equivalent) or
lubricant meeting requirements
of NLGI # 2, Category LB
or GC
-LB.
Power Steering
SystemGM Power Steering Fluid (GM
Part No. 1052884
- 1 pint,
1050017
- 1 quart, or equivalent).
Automatic
TransmissionDEXRON
-III Automatic
Transmission Fluid.
Key Lock
CylindersMulti-Purpose Lubricant,
Superlube
(GM Part
No. 12346241 or equivalent).
Chassis
LubricationChassis Lubricant (GM Part
No. 12377985 or equivalent) or
lubricant meeting requirements
of NLGI # 2, Category LB
or GC
-LB.
Front Wheel
BearingsWheel Bearing Lubricant meeting
requirements of NLGI # 2,
Category GC or GC
-LB (GM Part
No. 1051344 or equivalent).

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7-45
USAGEFLUID/LUBRICANT
Front and Rear
Axle (Standard
Differential)SAE 80W-90 Axle Lubricant (GM
Part No. 1052271 or equivalent).
Rear Axle
(Locking
Differential)SAE 80W-90 Axle Lubricant; Use
only GM Part No. 1052271. Do
not add friction modifier.
Manual Transfer
CaseDEXRON
-III Automatic
Transmission Fluid.
Automatic
Transfer CaseAutomatic Transfer Case Fluid
(GM Part No. 12378396).
Front Axle
Propshaft Spline
and Universal
JointsChassis Lubricant (GM Part
No. 12377985 or equivalent) or
lubricant meeting requirements
of NLGI # 2, Category LB or
GC
-LB.
One-Piece
Propshaft Spline
(With Two
-Wheel
Drive)
Spline Lubricant, Special
Lubricant (GM Part
No. 12345879) or lubricant
meeting requirements of
GM 9985830.
USAGEFLUID/LUBRICANT
Hood Latch
Assembly,
Secondary Latch,
Pivots, Spring
Anchor and
Release PawlLubriplate
Lubricant Aerosol
(GM Part No. 12346293 or
equivalent) or lubricant meeting
requirements of NLGI # 2,
Category LB or GC
-LB.
Hood and Door
HingesMulti-Purpose Lubricant,
Superlube
(GM Part No.
12346241 or equivalent).
Body Door
Hinge Pins,
Tailgate Hinge
and Linkage,
Folding Seat and
Fuel Door HingeMulti-Purpose Lubricant,
Superlube
(GM Part
No. 12346241 or equivalent).
Outer Tailgate
Handle Pivot
PointsMulti-Purpose Lubricant,
Superlube
(GM Part
No. 12346241 or equivalent).
Weatherstrip
ConditioningDielectric Silicone Grease (GM
Part No. 12345579 or equivalent).
Weatherstrip
SqueaksSynthetic Grease with Teflon,
Superlube
(GM Part
No. 12371287 or equivalent).

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8-6
Chevrolet Roadside Assistance Program
To enhance Chevrolet's strong commitment to customer
satisfaction, Chevrolet is excited to announce the
establishment of the Chevrolet Roadside Assistance
Center. As the owner of a 1999 Chevrolet, membership
in Roadside Assistance is free.
Roadside Assistance is available 24 hours a day,
365 days a year, by calling 1
-800-CHEV-USA
(1
-800-243-8872). This toll-free number will provide you
over
-the-phone roadside assistance with minor mechanical problems. If your problem cannot be resolved over the
phone, our advisors have access to a nationwide network of
dealer recommended service providers. Roadside
membership is free; however some services may incur costs.
Roadside offers two levels of service to the customer,
Basic Care and Courtesy Care:

Toll
-free number, 1-800-CHEV-USA

Free towing for warranty repairs

Basic over
-the-phone technical advice

Available dealer services at reasonable costs (i.e.,
wrecker services, locksmith/key service, glass
repair, etc.)
ROADSIDE Courtesy Care PROVIDES:

Roadside Basic Care services (as outlined previously)
Plus:

FREE Non
-Warranty Towing (to the closest dealer
from a legal roadway)

FREE Locksmith/Key Service (when keys are lost
on the road or locked inside)

FREE Flat Tire Service (spare installed on the road)

FREE Jump Start (at home or on the road)

FREE Fuel Delivery ($5 of fuel delivered on
the road)

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9-1
Section 9 Index
A
ir Bag 1-29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adding Equipment 1-36 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How Does it Restrain 1-33 . . . . . . . . . . . . . . . . . . . . . . . . . .
How it Works 1-31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Location 1-31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Readiness Light 1-31, 2-73 . . . . . . . . . . . . . . . . . . . . . . . . .
Servicing 1-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
What Makes it Inflate 1-33 . . . . . . . . . . . . . . . . . . . . . . . . . .
What Will You See After it Inflates 1-33 . . . . . . . . . . . . . . .
When Should it Inflate 1-32 . . . . . . . . . . . . . . . . . . . . . . . . .
Air Cleaner 6-16, 6-68 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Cleaner Filter Restriction Indicator Check 7-39 . . . . . . . .
Air Conditioning 3-3, 3-4, 3-7 . . . . . . . . . . . . . . . . . . . . . . . .
Air Conditioning Refrigerants 6-68 . . . . . . . . . . . . . . . . . . . . .
Alignment and Balance, Tire 6-48 . . . . . . . . . . . . . . . . . . . . . .
Aluminum Wheels, Cleaning 6-56 . . . . . . . . . . . . . . . . . . . . . .
Antenna, Fixed 3-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Antifreeze 6-25, 7-44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Anti-Lock, Brake System Warning Light 2-75, 4-7 . . . . . . . .
Anti-Lock, Brakes 4-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Anti-Theft, Radio 3-24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appearance Care 6-51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appearance Care and Materials 6-58 . . . . . . . . . . . . . . . . . . . .
Arbitration Program 8-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Armrest Storage Compartment 2
-58 . . . . . . . . . . . . . . . . . . . .
Ashtrays 2-62 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Audio Equipment, Adding 3-27 . . . . . . . . . . . . . . . . . . . . . . . .
Audio Systems 3-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Automatic Transmission
Check 7
-39 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fluid 6-19, 7-44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation 2-16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overdrive 2-18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Park Mechanism Check 7-41 . . . . . . . . . . . . . . . . . . . . . . . .
Shifting 2-16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Auxiliary Power Outlet 2-63 . . . . . . . . . . . . . . . . . . . . . . . . . .
Axle, Front 6-24, 7-45 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Axle, Locking Rear 2-31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Axle, Rear 6-22, 7-45 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery 6-34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Jump Starting 5-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacement, Keyless Entry 2-7 . . . . . . . . . . . . . . . . . . . . .
Warnings 5-3, 5-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BBB Auto Line 8-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Better Business Bureau Mediation 8-3 . . . . . . . . . . . . . . . . . . .
Blizzard 4-40 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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9-2
Brake
Adjustment 6-34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fluid 6-30, 7-44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Master Cylinder 6-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parking 2-25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pedal Travel 6-33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing System Parts 6-34 . . . . . . . . . . . . . . . . . . . . . . . .
System Warning Light 2-74 . . . . . . . . . . . . . . . . . . . . . . . . .
Trailer 4-52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transmission Shift Interlock Check 7-40 . . . . . . . . . . . . . . .
Wear 6-33 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brakes, Anti-Lock 4-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Braking 4-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Braking in Emergencies 4-9 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Break-In, New Vehicle 2-12 . . . . . . . . . . . . . . . . . . . . . . . . . .
Brightness Control 2-41 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BTSI Check 7-40 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bulb Replacement 6-35, 6-65, 6-66 . . . . . . . . . . . . . . . . . . . .
Camper Type Mirrors 2-50 . . . . . . . . . . . . . . . . . . . . . . . . . .
Canadian Roadside Assistance 8-7 . . . . . . . . . . . . . . . . . . . . . .
Capacities and Specifications 6-67 . . . . . . . . . . . . . . . . . . . . . .
Carbon Monoxide 2-9, 2-29, 4-41, 4-51, 4-52 . . . . . . . . . . .
Cargo Security Shade 2-59 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cargo Tie Downs 2-61 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cassette Deck Service 7-38 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cassette Tape Player 3-12, 3-15 . . . . . . . . . . . . . . . . . . . . . . .
Cassette Tape Player Care 3-28 . . . . . . . . . . . . . . . . . . . . . . . .
Cassette Tape Player Errors 3-14, 3-18 . . . . . . . . . . . . . . . . . .
Center High-Mounted Stoplamp Bulb Replacement 6-41 . . . .
Center Passenger Position 1-36 . . . . . . . . . . . . . . . . . . . . . . . .
Certification/Tire Label 4-44 . . . . . . . . . . . . . . . . . . . . . . . . . . Chains, Safety 4
-51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chains, Tire 6-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Changing a Flat Tire 5-19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Charging System Warning Light 2-73 . . . . . . . . . . . . . . . . . . .
Check Gages Light 2-81 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking Your Restraint Systems 1-63 . . . . . . . . . . . . . . . . . .
Chemical Paint Spotting 6-57 . . . . . . . . . . . . . . . . . . . . . . . . . .
Child Restraints 1-46 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Securing in a Rear Outside Seat Position 1-54 . . . . . . . . . . .
Securing in the Center Seat Position 1-56 . . . . . . . . . . . . . .
Securing in the Right Front Seat Position 1-57 . . . . . . . . . .
Top Strap 1-51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Where to Put 1-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cigarette Lighter 2-62 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Circuit Breakers and Fuses 6-61 . . . . . . . . . . . . . . . . . . . . . . .
Cleaner, Air 6-16, 6-68 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning
Aluminum Wheels 6
-56 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exterior Lamps/Lenses 6-55 . . . . . . . . . . . . . . . . . . . . . . . .
Fabric and Carpet 6-51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Glass 6-54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inside of Your Vehicle 6-51 . . . . . . . . . . . . . . . . . . . . . . . . .
Instrument Panel 6-53 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interior Plastic Components 6-53 . . . . . . . . . . . . . . . . . . . . .
Leather 6-53 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outside of Your Vehicle 6-55 . . . . . . . . . . . . . . . . . . . . . . . .
Special Problems 6-52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stains 6-52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tires 6-56 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vinyl 6-53 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wheels 6-56 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Windshield and Wiper Blades 6-54 . . . . . . . . . . . . . . . . . . .