octane CHEVROLET S10 2001 2.G Owners Manual

4-49
Vehicle*Axle
Ratio Max. Trailer Wt.
4WD Regular Cab
4.3L V6/Manual Trans. 3.42 4,200 lbs. (1 907 kg)
4.3L V6/Auto. Trans. 3.42
3.735,700 lbs. (2 588 kg)
5,700 lbs. (2 588 kg)
4WD Extended Cab
4.3L V6/Manual Trans. 3.42 4,000 lbs. (1 816 kg)
4.3L V6/Manual Trans.
w/ZR23.73 4,400 lbs. (1 998 kg)
4.3L V6/Auto. Trans. 3.42
3.735,500 lbs. (2 497 kg)
5,500 lbs. (2 497 kg)
4.3L V6/Auto. Trans.
w/ZR23.73 4,900 lbs. (2 225 kg)
4WD Crew Cab
4.3L V6/Auto. Trans. 3.42
3.735,200 lbs. (2 361 kg)
5,200 lbs. (2 361 kg)* If your vehicle is equipped with RPO V4A
(Xtreme
Sport Appearance Package), your vehicle
can tow a maximum of 800 lbs. (363 kg). For more
information on RPO codes, see ªService Parts
Identification Labelº in the Index.
#If your vehicle is equipped with a code 5 engine you
must use regular unleaded gasoline rated at 87 octane or
higher when towing.
Maximum trailer weight is calculated assuming the
driver and one passenger are in the tow vehicle and it
has all the required trailering equipment. The weight of
additional optional equipment, passengers and cargo in
the tow vehicle must be subtracted from the maximum
trailer weight. The weight of the trailer tongue also
affects trailering capacity. See ªWeight of the Trailer
Tongueº later in this section.
You can ask your dealer for our trailering information or
advice, or you can write us at the address listed in your
Warranty and Owner Assistance Information Booklet.
In Canada, write to:
General Motors of Canada Limited
Customer Communication Centre, 163
-005
1908 Colonel Sam Drive
Oshawa, Ontario L1H 8P7

6-3
CAUTION:
You can be injured and your vehicle could be
damaged if you try to do service work on a
vehicle without knowing enough about it.

Be sure you have sufficient knowledge,
experience, the proper replacement parts
and tools before you attempt any vehicle
maintenance task.

Be sure to use the proper nuts, bolts and
other fasteners. ªEnglishº and ªmetricº
fasteners can be easily confused. If you use
the wrong fasteners, parts can later break
or fall off. You could be hurt.
Adding Equipment to the Outside of
Your Vehicle
Things you might add to the outside of your vehicle can
affect the airflow around it. This may cause wind noise
and affect windshield washer performance. Check with
your dealer before adding equipment to the outside of
your vehicle.
Fuel (Gasoline)
The 8th digit of your vehicle identification number
(VIN) shows the code letter for your engine. You will
find the VIN at the top left of your instrument panel.
See ªVehicle Identification Numberº in the Index.
If you have the 2200 L4 (Code 5) engine, you may use
either regular unleaded gasoline or ethanol fuel up to
85% (E
-85); also see ªFuel (85% Ethanol/E-85)º
following. If you have the 4.3L V6 engine, use only
regular unleaded gasoline.
Use regular unleaded gasoline rated at 87 octane or
higher. It is recommended that the gasoline meet
specifications which were developed by the American
Automobile Manufacturers Association (AAMA) and
endorsed by the Canadian Motor Vehicle Manufacturers
Association for better vehicle performance and engine
protection. Gasolines meeting the AAMA specification
could provide improved driveability and emission
control system performance compared to
other gasolines.

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In Canada, look for the
ªAuto Makers' Choiceº
label on the fuel pump.
Canada Only
Be sure the posted octane is at least 87. If the octane is
less than 87, you may get a heavy knocking noise when
you drive. If it's bad enough, it can damage your engine.
If you're using fuel rated at 87 octane or higher and
you hear heavy knocking, your engine needs service.
But don't worry if you hear a little pinging noise when
you're accelerating or driving up a hill. That's normal,
and you don't have to buy a higher octane fuel to get
rid of pinging. It's the heavy, constant knock that means
you have a problem.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. See ªMalfunction
Indicator Lampº in the Index. 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 the 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.