2003 GMC SAVANA heating

Turn Signals When Towing a Trailer
When you tow a trailer, your vehicle has to have extra
wiring and a heavy-duty turn signalasher (included
in the optional trailering package).
The arrows on your instrument panel willash whenever
you signal a turn or lane change. Properly hooked up,
the trailer lamps will alsoash, telling other drivers
you’re about to turn, change lanes or stop.
When towing a trailer, the arrows on your instrument
panel willash for turns even if the bulbs on the trailer
are burned out. Thus, you may think drivers behind
you are seeing your signal when they are not. It’s
important to check occasionally to be sure the trailer
bulbs are still working.
Driving On Grades
Reduce speed and shift to a lower gearbeforeyou start
down a long or steep downgrade. If you don’t shift
down, you might have to use your brakes so much that
they would get hot and no longer work well.
When towing at high altitude on steep uphill grades,
consider the following: Engine coolant will boil at a lower
temperature than at normal altitudes. If you turn your
engine off immediately after towing at high altitude
on steep uphill grades, your vehicle may show signs
similar to engine overheating. To avoid this, let the
engine run while parked (preferably on level ground)
with the automatic transmission in PARK (P) for a
few minutes before turning the engine off. If you do get
the overheat warning, seeEngine Overheating on
page 5-26.
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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 Specifications....................................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.....................5-9
Hood Release..............................................5-10
Engine Compartment Overview.......................5-12
Engine Oil...................................................5-13
Engine Air Cleaner/Filter................................5-17
Automatic Transmission Fluid.........................5-19
Engine Coolant.............................................5-22
Radiator Pressure Cap..................................5-25
Engine Overheating.......................................5-26
Cooling System
............................................5-28
Engine Fan Noise
.........................................5-34
Power Steering Fluid
.....................................5-35Windshield Washer Fluid................................5-36
Brakes........................................................5-37
Battery........................................................5-40
Jump Starting...............................................5-41
All-Wheel Drive..............................................5-46
Rear Axle.......................................................5-47
Front Axle......................................................5-48
Noise Control System.....................................5-49
Tampering with Noise Control System
Prohibited.................................................5-49
Bulb Replacement..........................................5-50
Halogen Bulbs..............................................5-50
Headlamps..................................................5-50
Front Turn Signal, Sidemarker and
Parking Lamps..........................................5-52
Taillamps.....................................................5-52
Replacement Bulbs.......................................5-54
Windshield Wiper Blade Replacement..............5-55
Tires..............................................................5-56
Inflation – Tire Pressure................................5-57
Dual Tire Operation.......................................5-58
Tire Inspection and Rotation...........................5-58
When It Is Time for New Tires.......................5-60
Section 5 Service and Appearance Care
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How to Add Fluid
Refer to the Maintenance Schedule to determine
what kind of transmissionfluid to use. SeePart D:
Recommended Fluids and Lubricants on page 6-18.
Using a funnel, addfluid down the transmission dipstick
tube only after checking the transmissionfluid while it
is hot. (A cold check is used only as a reference.)
If thefluid level is low, add only enough of the proper
fluid to bring the level up to the HOT area for a hot
check. It doesn’t take muchfluid, generally less than
one pint (0.5 L).Don’t overfill.
Notice:We recommend you use onlyfluid labeled
DEXRON
®-III, becausefluid with that label is
made especially for your automatic transmission.
Damage caused byfluid other than DEXRON
®-III
is not covered by your new vehicle warranty.
•After addingfluid, recheck thefluid level as
described under″How to Check.″
•When the correctfluid level is obtained, push the
dipstick back in all the way; thenflip the handle
down to lock the dipstick in place.
Engine Coolant
The cooling system in your vehicle isfilled with
DEX-COOL®engine coolant. This coolant is designed
to remain in your vehicle for 5 years or 150,000 miles
(240 000 km), whichever occursfirst, if you add
only DEX-COOL
®extended life coolant.
The following explains your cooling system and how to
add coolant when it is low. If you have a problem
with engine overheating, seeEngine Overheating on
page 5-26.
A 50/50 mixture of clean, drinkable water and
DEX-COOL
®coolant will:
•Give freezing protection down to−34°F(−37°C).
•Give boiling protection up to 265°F (129°C).
•Protect against rust and corrosion.
•Help keep the proper engine temperature.
•Let the warning lights and gages work as they
should.
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Add coolant mixture at the recovery tank, but be careful
not to spill it.
{CAUTION:
You can be burned if you spill coolant on hot
engine parts. Coolant contains ethylene glycol,
and it will burn if the engine parts are hot
enough. Don’t spill coolant on a hot engine.
Occasionally check the coolant level in the radiator.
For information on how to add coolant to the radiator,
seeCooling System on page 5-28.
Radiator Pressure Cap
The radiator pressure cap is located near the center of
the engine compartment.
Notice:Your radiator cap is a pressure-type cap
and must be tightly installed to prevent coolant loss
and possible engine damage from overheating.
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Engine Overheating
You willfind a coolant temperature gage on your
vehicle’s instrument panel.
If Steam Is Coming From Your Engine
{CAUTION:
Steam from an overheated engine can burn
you badly, even if you just open the hood.
Stay away from the engine if you see or hear
steam coming from it. Just turn it off and get
everyone away from the vehicle until it cools
down. Wait until there is no sign of steam or
coolant before you open the hood.
If you keep driving when your engine is
overheated, the liquids in it can catchfire.
You or others could be badly burned. Stop
your engine if it overheats, and get out of the
vehicle until the engine is cool.
See“Overheated Engine Protection Operating
Mode”in the Index for information on driving
to a safe place in an emergency.
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Tires
Your new vehicle comes with high-quality tires made by
a leading tire manufacturer. If you ever have questions
about your tire warranty and where to obtain service,
see your GMC Warranty booklet for details.
{CAUTION:
Poorly maintained and improperly used tires
are dangerous.
•Overloading your tires can cause
overheating as a result of too much
friction. You could have an air-out and a
serious accident. See“Loading Your
Vehicle”in the Index.
CAUTION: (Continued)
CAUTION: (Continued)
•
Underinflated tires pose the same danger
as overloaded tires. The resulting accident
could cause serious injury. Check all tires
frequently to maintain the recommended
pressure. Tire pressure should be checked
when your tires are cold.
•Overinflated tires are more likely to be
cut, punctured or broken by a sudden
impact—such as when you hit a pothole.
Keep tires at the recommended pressure.
•Worn, old tires can cause accidents.
If your tread is badly worn, or if your tires
have been damaged, replace them.
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Chime Level Adjustment..................................3-76
Cigarette Lighter.............................................3-16
Cleaning
Inside of Your Vehicle..................................5-82
Outside of Your Vehicle................................5-85
Underbody Maintenance...............................5-88
Weatherstrips..............................................5-85
Cleaning Exterior Lamps/Lenses.......................5-86
Climate Control System...................................3-17
Rear Air Conditioning and Heating System......3-19
Rear Heating System...................................3-18
Compact Disc Messages.................3-48, 3-59, 3-71
Control of a Vehicle.......................................... 4-6
Coolant
Engine Temperature Gage............................3-32
Heater, Engine............................................2-23
Low Warning Light.......................................3-33
Cooling System..............................................5-28
Cruise Control.................................................. 3-9
Cruise Control Light........................................3-38
Current and Past Model Order Forms................7-11
Customer Assistance Information
Courtesy Transportation.................................. 7-7
Customer Assistance for Text
Telephone (TTY) Users............................... 7-4
Customer Assistance Offices........................... 7-4
Customer Satisfaction Procedure..................... 7-2Customer Assistance Information (cont.)
GM Mobility Program for Persons with
Disabilities................................................ 7-5
Reporting Safety Defects to General Motors....7-10
Reporting Safety Defects to the Canadian
Government............................................7-10
Reporting Safety Defects to the United States
Government.............................................. 7-9
Roadside Assistance Program......................... 7-6
Service Publications Ordering Information........7-10
D
Daytime Running Lamps..................................3-13
Daytime Running Lamps Indicator Light.............3-39
Defensive Driving............................................. 4-2
Defogging and Defrosting.................................3-21
Directing the Airflow ........................................3-20
Doing Your Own Service Work........................... 5-3
Dome Lamp Override......................................3-14
Dome Lamps .................................................3-15
Door
60/40 Swing-Out Side Door...........................2-13
Cargo Door Relocking.................................... 2-9
Locks.......................................................... 2-8
Power Door Locks......................................... 2-9
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2003 - Savana OM

Door (cont.)
Rear Door Security Locks.............................2-10
Rear Doors.................................................2-15
Sliding Side Door........................................2-11
Driver
Position, Safety Belt.....................................1-14
Driving
At Night.....................................................4-14
City ...........................................................4-19
Defensive..................................................... 4-2
Drunken....................................................... 4-3
Freeway.....................................................4-20
Hill and Mountain Roads..............................4-22
In Rain and on Wet Roads...........................4-16
Winter........................................................4-24
Driving On Grades..........................................4-44
Driving on Snow or Ice....................................4-24
Driving Through Deep Standing Water...............4-18
Driving Through Flowing Water.........................4-18
Driving with a Trailer.......................................4-42
Dual Stage Air Bags........................................1-68
Dual Tire Operation.........................................5-58E
Electrical System
Add-On Equipment......................................5-91
Fuses and Circuit Breakers...........................5-92
Headlamp Wiring.........................................5-91
Windshield Wiper Fuses...............................5-91
Electronic Road-Speed Governor.......................3-26
Emissions Inspection and
Maintenance Programs.................................3-36
Engine
Air Cleaner/Filter.........................................5-17
Battery.......................................................5-40
Change Engine Oil Light...............................3-37
Check and Service Engine Soon Light............3-33
Compartment Overview................................5-12
Coolant......................................................5-22
Coolant Heater............................................2-23
Coolant Temperature Gage...........................3-32
Cooling System Inspection............................6-16
Exhaust.....................................................2-30
Fan Noise..................................................5-34
Oil .............................................................5-13
Overheating................................................5-26
Starting......................................................2-22
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2003 - Savana OM