2003 CHEVROLET S10 oil additives

Service............................................................5-3
Doing Your Own Service Work.........................5-3
Adding Equipment to the Outside of Your
Vehicle......................................................5-4
Fuel................................................................5-4
Gasoline Octane............................................5-4
Gasoline Speci®cations....................................5-5
California Fuel...............................................5-5
Additives.......................................................5-6
Fuels in Foreign Countries...............................5-6
Filling Your Tank............................................5-7
Filling a Portable Fuel Container.......................5-9
Checking Things Under
the Hood....................................................5-10
Hood Release..............................................5-10
Engine Compartment Overview.......................5-12
Engine Oil...................................................5-15
Engine Air Cleaner/Filter................................5-19
Automatic Transmission Fluid.........................5-22
Manual Transmission Fluid.............................5-25
Hydraulic Clutch...........................................5-26
Engine Coolant.............................................5-27Radiator Pressure Cap..................................5-29
Engine Overheating.......................................5-30
Cooling System............................................5-32
Engine Fan Noise.........................................5-39
Power Steering Fluid.....................................5-39
Windshield Washer Fluid................................5-40
Brakes........................................................5-41
Battery........................................................5-45
Jump Starting...............................................5-46
Rear Axle.......................................................5-51
Four-Wheel Drive............................................5-52
Front Axle......................................................5-53
Bulb Replacement..........................................5-54
Halogen Bulbs..............................................5-54
Headlamps..................................................5-54
One-Piece Front Turn Signal Lamps................5-56
Two-Piece Front Turn Signal Lamps................5-57
Center High-Mounted Stoplamp (CHMSL).........5-58
Taillamps.....................................................5-59
Replacement Bulbs.......................................5-59
Windshield Wiper Blade Replacement..............5-60
Section 5 Service and Appearance Care
5-1

Additives
To provide cleaner air, all gasolines in the United States
are now required to contain additives that will help
prevent engine and fuel system deposits from forming,
allowing your emission control system to work
properly. You should not have to add anything to your
fuel. 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
speci®cations described earlier.
Notice:Your vehicle was not designed for fuel that
contains methanol. Do not use fuel containing
methanol. It can corrode metal parts in your fuel
system and also damage the plastic and rubber
parts. That damage would not be covered under
your warranty.Some gasolines that are not reformulated for low
emissions may contain an octane-enhancing additive
called methylcyclopentadienyl manganese tricarbonyl
(MMT); ask the attendant where you buy gasoline
whether the fuel contains MMT. General Motors does
not recommend the use of such gasolines. Fuels
containing MMT can reduce the life of spark plugs and
the performance of the emission control system may
be affected. The malfunction indicator lamp may turn on.
If this occurs, return to your authorized GM dealer for
service.
Fuels in Foreign Countries
If you plan on driving in another country outside the
United States or Canada, the proper fuel may be hard
to ®nd. Never use leaded gasoline or any other fuel
not recommended in the previous text on fuel. Costly
repairs caused by use of improper fuel would not
be covered by your warranty.
To check the fuel availability, ask an auto club, or
contact a major oil company that does business in the
country where you will be driving.
5-6

As in the chart shown previously, SAE 5W-30 is the
only viscosity grade recommended for your vehicle. You
should look for and use only oils which have the API
Starburst symbol and which are also identi®ed as
SAE 5W-30. If you cannot ®nd such SAE 5W-30 oils,
you can use an SAE 10W-30 oil which has the API
Starburst symbol, if it's going to be 0ÉF (-18ÉC)
or above. Do not use other viscosity grade oils, such as
SAE 10W-40 or SAE 20W-50 under any conditions.
Notice:Use only engine oil with the American
Petroleum Institute Certi®ed For Gasoline Engines
starburst symbol. Failure to use the recommended
oil can result in engine damage not covered by
your warranty.
GM Goodwrench
žoil meets all the requirements for
your vehicle.
If you are in an area of extreme cold, where the
temperature falls below-20ÉF (-29ÉC), it is
recommended that you use either an SAE 5W-30
synthetic oil or an SAE 0W-30 oil. Both will provide
easier cold starting and better protection for your engine
at extremely low temperatures.
Engine Oil Additives
Don't add anything to your oil. The recommended oils
with the starburst symbol are all you will need for
good performance and engine protection.
When to Change Engine Oil
If any one of these is true for you, use the short trip/city
maintenance schedule:
·Most trips are less than 5 miles (8 km). This is
particularly important when outside temperatures
are below freezing.
·Most trips include extensive idling (such as frequent
driving in stop-and-go traffic).
·You frequently tow a trailer or use a carrier on top
of your vehicle.
·The vehicle is used for delivery service, police, taxi
or other commercial application.
Driving under these conditions causes engine oil to
break down sooner. If any one of these is true for your
vehicle, then you need to change your oil and ®lter
every 3,000 miles (5 000 km) or 3 months Ð whichever
occurs ®rst.
5-18

What to Use
Use a mixture of one-halfclean, drinkable waterand
one-half DEX-COOLžcoolant which won't damage
aluminum parts. If you use this coolant mixture, you don't
need to add anything else.
{CAUTION:
Adding only plain water to your cooling system
can be dangerous. Plain water, or some other
liquid such as alcohol, can boil before the
proper coolant mixture will. Your vehicle's
coolant warning system is set for the proper
coolant mixture. With plain water or the wrong
mixture, your engine could get too hot but you
wouldn't get the overheat warning. Your engine
could catch ®re and you or others could be
burned. Use a 50/50 mixture of clean, drinkable
water and the proper coolant.
Notice:If you use an improper coolant mixture, your
engine could overheat and be badly damaged. The
repair cost wouldn't be covered by your warranty.
Too much water in the mixture can freeze and crack
the engine, radiator, heater core and other parts.If you have to add coolant more than four times a year,
have your dealer check your cooling system.
Notice:If you use the proper coolant, you don't
have to add extra inhibitors or additives which claim
to improve the system. These can be harmful.
Checking Coolant
The coolant recovery tank is located in the engine
compartment near the passenger side of the vehicle.
See
Engine Compartment Overview on page 5-12for more information on location.
5-28

E
Electrical System............................................5-93
Add-On Equipment......................................5-93
Fuses and Circuit Breakers...........................5-93
Headlamps.................................................5-93
Power Windows and Other Power Options......5-93
Windshield Wiper Fuses...............................5-93
Electronic Transfer Case..................................2-30
Emissions Inspection and Maintenance
Programs...................................................3-35
Engine Compartment Fuse Block......................5-96
Engine Coolant Level Check.............................6-26
Engine Oil Additives........................................5-18
Engine Oil Level Check...................................6-26
Engine..........................................................5-19
Air Cleaner/Filter.........................................5-19
Battery.......................................................5-45
Check and Service Engine Soon Light............3-33
Compartment Overview................................5-12
Coolant Heater............................................2-24
Coolant Temperature Gage...........................3-32
Coolant......................................................5-27
Cooling System Inspection............................6-32
Exhaust.....................................................2-37
Fan Noise..................................................5-39
Oil .............................................................5-15
Overheating................................................5-30
Starting......................................................2-22
Entry Lighting.................................................3-15Environmental Concerns..................................4-16
Exit Lighting...................................................3-16
Express Down Window....................................2-15
Extended Cab (Jump Seat)..............................1-48
Extender, Safety Belt.......................................1-29
Exterior Lamps...............................................3-12
F
Filter.............................................................5-19
Engine Air Cleaner......................................5-19
Finding a PTY Station.....................3-48, 3-56, 3-66
Finding a Station....................3-42, 3-45, 3-53, 3-63
Finish Care....................................................5-88
Finish Damage...............................................5-89
Five-Speed....................................................2-28
Fixed Mast Antenna........................................3-76
Flash-To-Pass Feature....................................... 3-7
Flat Tire, Changing.........................................5-72
Flat Tire........................................................5-71
Fluid.............................................................5-22
Automatic Transmission................................5-22
Manual Transmission....................................5-25
Power Steering...........................................5-39
Windshield Washer......................................5-40
FM ...............................................................3-74
Fog Lamps....................................................3-15
Following Distance..........................................4-61
Four-Wheel Drive....................................2-29, 5-52
5

Front Axle......................................................5-53
Front Map Lamps...........................................3-16
Front Storage Area.........................................2-48
Fuel............................................................... 5-4
Additives...................................................... 5-6
California Fuel.............................................. 5-5
Filling a Portable Fuel Container..................... 5-9
Filling Your Tank........................................... 5-7
Fuels in Foreign Countries.............................. 5-6
Gage.........................................................3-38
Gasoline Octane........................................... 5-4
Gasoline Speci®cations.................................. 5-5
Low Warning Light.......................................3-39
System Inspection.......................................6-32
Fuses...........................................................5-93
Fuses and Circuit Breakers...........................5-93
Windshield Wiper.........................................5-93
G
Gage............................................................3-38
Check Gages Warning Light..........................3-38
Engine Coolant Temperature.........................3-32
Fuel..........................................................3-38
Oil Pressure...............................................3-36
Speedometer..............................................3-25
Tachometer.................................................3-26
Voltmeter Gage...........................................3-30Gage (cont.)
Garment Hooks..............................................2-49
Gasoline......................................................... 5-4
Octane........................................................ 5-4
Speci®cations............................................... 5-5
Getting Familiar with Off-Road Driving................4-17
Glove Box.....................................................2-41
GM Mobility Program for Persons with
Disabilities.................................................... 7-5
H
Hazard Warning Flashers................................... 3-4
Head Restraints............................................... 1-7
Headlamp High/Low-Beam Changer.................... 3-7
Headlamps....................................................5-54
Bulb Replacement.......................................5-54
Electrical System.........................................5-93
Halogen Bulbs............................................5-54
One-Piece Front Turn Signal Lamps...............5-56
Two-Piece Front Turn Signal Lamps...............5-57
Heated Seats................................................... 1-5
Heating.........................................................3-19
Highway Hypnosis...........................................4-36
Hill and Mountain Roads..................................4-36
Hitches..........................................................4-59
Hood............................................................5-10
Checking Things Under................................5-10
6