1999 CHEVROLET TAHOE gas type

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1-33
In any particular crash, no one can say whether an air
bag should have inflated simply because of the damage
to a vehicle or because of what the repair costs were.
Inflation is determined by the angle of the impact and
how quickly the vehicle slows down in frontal or
near
-frontal impacts.
The air bag system is designed to work properly under a
wide range of conditions, including off
-road usage.
Observe safe driving speeds, especially on rough terrain.
As always, wear your safety belt. See ªOff
-Road
Drivingº in the Index for more tips on off
-road driving.
What makes an air bag inflate?
In an impact of sufficient severity, the air bag sensing
system detects that the vehicle is in a crash. The sensing
system triggers a release of gas from the inflator, which
inflates the air bag. The inflator, air bag and related
hardware are all part of the air bag modules inside the
steering wheel and in the instrument panel in front of the
right front passenger.
How does an air bag restrain?
In moderate to severe frontal or near
-frontal collisions,
even belted occupants can contact the steering wheel or
the instrument panel. Air bags supplement the protection
provided by safety belts. Air bags distribute the force
of the impact more evenly over the occupant's upperbody, stopping the occupant more gradually. But
air bags would not help you in many types of
collisions, including rollovers, rear impacts and
side impacts, primarily because an occupant's motion
is not toward those air bags. Air bags should never be
regarded as anything more than a supplement to safety
belts, and then only in moderate to severe frontal or
near
-frontal collisions.
What will you see after an air bag inflates?
After an air bag inflates, it quickly deflates, so quickly
that some people may not even realize the air bag
inflated. Some components of the air bag module
-- the
steering wheel hub for the driver's air bag, or the
instrument panel for the right front passenger's
bag
-- will be hot for a short time. The parts of the
bag that come into contact with you may be warm, but
not too hot to touch. There will be some smoke and
dust coming from vents in the deflated air bags. Air bag
inflation doesn't prevent the driver from seeing or from
being able to steer the vehicle, nor does it stop people
from leaving the vehicle.

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6-4
If your vehicle is certified to meet California Emission
Standards (indicated on the underhood emission control
label), it is designed to operate on fuels that meet
California specifications. If such fuels are not available
in states adopting California emissions standards, your
vehicle will operate satisfactorily on fuels meeting
federal specifications, but emission control system
performance may be affected. The malfunction indicator
lamp on your instrument panel may turn on and/or your
vehicle may fail a smog
-check test. If this occurs, return
to your authorized GM dealer for diagnosis to determine
the cause of failure. In the event it is determined that the
cause of the condition is the type of fuels used, repairs
may not be covered by your warranty.
Some gasolines that are not reformulated for low
emissions may contain an octane
-enhancing additive
called methylcyclopentadienyl manganese tricarbonyl
(MMT); ask your service station operator whether or not
his fuel contains MMT. General Motors does not
recommend the use of such gasolines. If fuels containing
MMT are used, spark plug life may be reduced and your
emission control system performance may be affected.
The malfunction indicator lamp on your instrument
panel may turn on. If this occurs, return to your
authorized GM dealer for service.To provide cleaner air, all gasolines in the United States
are now required to contain additives that will help
prevent deposits from forming in your engine and fuel
system, allowing your emission control system to
function properly. Therefore, you should not have to
add anything to the fuel. In addition, gasolines
containing oxygenates, such as ethers and ethanol, and
reformulated gasolines may be available in your area to
contribute to clean air. General Motors recommends that
you use these gasolines, particularly if they comply with
the specifications described earlier.
NOTICE:
Your vehicle was not designed for fuel that
contains methanol. Don't use it. It can corrode
metal parts in your fuel system and also damage
plastic and rubber parts. That damage wouldn't
be covered under your warranty.

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6-7
CAUTION:
If you get gasoline on yourself and then
something ignites it, you could be badly burned.
Gasoline can spray out on you if you open the
fuel filler cap too quickly. This spray can happen
if your tank is nearly full, and is more likely in
hot weather. Open the fuel filler cap slowly and
wait for any ªhissº noise to stop. Then unscrew
the cap all the way.
Be careful not to spill gasoline. Clean gasoline from
painted surfaces as soon as possible. See ªCleaning the
Outside of Your Vehicleº in the Index.When you put the cap back on, turn it to the right
(clockwise) until you hear a clicking sound. Make sure
you fully install the cap. The diagnostic system can
determine if the fuel cap has been left off or improperly
installed. This would allow fuel to evaporate into the
atmosphere. See ªMalfunction Indicator Lampº in
the Index.
NOTICE:
If you need a new cap, be sure to get the right
type. Your dealer can get one for you. If you get
the wrong type, it may not fit properly. This may
cause your malfunction indicator lamp to light
and your fuel tank and emissions system may be
damaged. See ªMalfunction Indicator Lampº in
the Index.

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CAUTION:
Batteries have acid that can burn you and gas
that can explode. You can be badly hurt if you
aren't careful. See ªJump Startingº in the Index
for tips on working around a battery without
getting hurt.
Contact your dealer to learn how to prepare your vehicle
for longer storage periods.
Also, for your audio system, see ªTheft
-Deterrent
Featureº in the Index.
Bulb Replacement
Before you replace any bulbs, be sure that all the lamps
are off and the engine isn't running. For the proper bulb
type, see ªReplacement Bulbsº in the Index.
For any bulb changing procedure not listed in this
section, contact your GM dealer's service department.
Halogen Bulbs
CAUTION:
Halogen bulbs have pressurized gas inside and
can burst if you drop or scratch the bulb. You or
others could be injured. Be sure to read and
follow the instructions on the bulb package.

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6-67
Capacities and Specifications
Please refer to ªRecommended Fluids and Lubricantsº in the Index for more information.
Engine Identification -- Gasoline Engines
EngineªVORTECº 5700 ªVORTECº 7400
Type V8 V8
RPO Code L31 L29
VIN Code R J
Fuel System SFI* SFI*
*Sequential Fuel Injection
Wheels and Tires
MODEL DESCRIPTION TORQUE
C 1500 5 bolts (14 mm)
140 lb
-ft (190 N´m)
K 1500, C
-K 25006 bolts (14 mm)
140 lb-ft (190 N´m)
C
-K 25008 bolts (14 mm)
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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6-68 Cooling System Capacity (Approximate)
After refill, the level must be rechecked. See ªCooling Systemº in the Index.
ENGINE VIN QTY Without Rear Heater QTY With Rear Heater
ªVORTECº 5700 V8 R 17.5 Quarts (16.5 L) 20 Quarts (19 L)
ªVORTECº 7400 V8 J 25 Quarts (23.5 L) 27.5 Quarts (26 L)
Crankcase Capacity (Approximate)
After refill, the level must be rechecked. Add enough engine oil so that the fluid is within the proper operating range.
See ªEngine Oilº in the Index.
ENGINE VIN
QUANTITY WITH FILTER

ªVORTECº 5700 V8 R 5 Quarts (4.8 L)
ªVORTECº 7400 V8 J 6.6 Quarts (6.3 L)

Oil filter should be changed at every oil change.
Fuel Tank Capacity (Approximate)
TYPE QUANTITY
Utility 30 Gallons (113 L)TYPE QUANTITY
Suburban
- Gasoline 44 Gallons (167 L)
Suburban
- Diesel 42 Gallons (159 L)
Air Conditioning Refrigerants
Not all air conditioning refrigerants are the same. If the air conditioning system in your vehicle needs refrigerant, be sure
the proper refrigerant is used. If you're not sure, ask your dealer.
See refrigerant charge label under the hood for charge capacity information and requirements.

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6-69
Normal Maintenance Replacement Parts -- Gasoline Engines
Replacement part numbers listed in this section are based on the latest information available at the time of printing,
and are subject to change. If a part listed in this manual is not the same as the part used in your vehicle when it was
built, or if you have any questions, please contact your GM truck dealer.
EngineªVORTECº 5700 V8 ªVORTECº 7400 V8
VIN R J
Oil Filter
AC Type PF1218
AC Type PF1218
Air Cleaner Filter
AC Type A1300C

AC Type A1300C


PCV Valve AC Type CV769C AC Type CV774C
Spark Plugs
AC Type 41
-932 AC Type 41-932
Spark Plug Gap 0.060 in. (1.52 mm) 0.060 in. (1.52 mm)
Fuel Filter AC Type GF626 AC Type GF626
Wiper Blades (Front) GM Part No. 22154886 GM Part No. 22154886
Wiper Blade Type (Front) Trico Trico
Wiper Blade Length (Front) 18 inches (45.0 cm) 18 inches (45.0 cm)
Wiper Blade (Rear) GM Part No. 22154396 GM Part No. 22154396
Wiper Blade Type (Rear) Trico Trico
Wiper Blade Length (Rear) 14 inches (35.5 cm) 14 inches (35.5 cm)

Four
-Wheel-Drive Vehicles -- use a PF52 oil filter.


A1301C High
-capacity air cleaner filter.