fuel type GMC YUKON 1999 Owner's Manual

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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 GMC 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 GMC 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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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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Capacities and Specifications
Please refer to ªRecommended Fluids and Lubricantsº in the Index for more information.
Engine Identification
EngineªVORTECº 5700
Type V8
RPO Code L31
VIN Code R
Fuel System SFI*
*Sequential Fuel Injection
Wheels and Tires
MODEL DESCRIPTION TORQUE
K 1500 6 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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Normal Maintenance Replacement Parts
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
VIN R
Oil Filter AC Type PF52
Air Cleaner Filter
AC Type A1300C

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

A1301C high
-capacity air cleaner filter.