2003 GMC SAFARI fuel pressure

Instrument Panel Overview...............................3-2
Hazard Warning Flashers................................3-4
Other Warning Devices...................................3-5
Horn .............................................................3-5
Tilt Wheel.....................................................3-5
Turn Signal/Multifunction Lever.........................3-6
Exterior Lamps.............................................3-12
Interior Lamps..............................................3-15
Accessory Power Outlets...............................3-16
Ashtrays and Cigarette Lighter........................3-17
Climate Controls............................................3-18
Climate Control System.................................3-18
Rear Heating System....................................3-19
Rear Air Conditioning System.........................3-20
Rear Climate Control System.........................3-21
Warning Lights, Gages and Indicators.............3-23
Instrument Panel Cluster
................................3-24
Speedometer and Odometer
...........................3-25
Safety Belt Reminder Light
.............................3-25
Air Bag Readiness Light
................................3-26
Charging System Light
..................................3-27
Voltmeter Gage
............................................3-27
Brake System Warning Light
..........................3-28Anti-Lock Brake System
Warning Light...........................................3-29
Engine Coolant Temperature Gage..................3-29
Malfunction Indicator Lamp.............................3-30
Oil Pressure Gage........................................3-33
Security Light...............................................3-34
Service All-Wheel Drive Light.........................3-34
Tow/Haul Mode Light....................................3-35
Check Gages Warning Light...........................3-35
Fuel Gage...................................................3-36
Low Fuel Warning Light.................................3-36
Audio System(s).............................................3-37
Setting the Time for Radios with
the Set Button..........................................3-37
Setting the Time for Radios with
HR and MN Buttons..................................3-37
AM-FM Radio...............................................3-38
Radio with CD..............................................3-40
Rear Seat Audio (RSA).................................3-45
Theft-Deterrent Feature..................................3-46
Understanding Radio Reception......................3-49
Care of Your CDs.........................................3-49
Care of Your CD Player................................3-49
Fixed Mast Antenna......................................3-49
Section 3 Instrument Panel
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2003 - Safari OM

Here are some things you can check before a trip:
Windshield Washer Fluid:Is the reservoir full? Are
all windows clean inside and outside?
Wiper Blades:Are they in good shape?
Fuel, Engine Oil, Other Fluids:Have you checked
all levels?
Lamps:Are they all working? Are the lenses clean?
Tires:They are vitally important to a safe,
trouble-free trip. Is the tread good enough for
long-distance driving? Are the tires all inated to the
recommended pressure?
Weather Forecasts:What’s the weather outlook
along your route? Should you delay your trip a
short time to avoid a major storm system?
Maps:Do you have up-to-date maps?
Highway Hypnosis
Is there actually such a condition as“highway hypnosis”?
Or is it just plain falling asleep at the wheel? Call it
highway hypnosis, lack of awareness, or whatever.
There is something about an easy stretch of road with
the same scenery, along with the hum of the tires on the
road, the drone of the engine, and the rush of the
wind against the vehicle that can make you sleepy. Don’t
let it happen to you! If it does, your vehicle can leave
the road inless than a second,and you could crash and
be injured.
What can you do about highway hypnosis? First, be
aware that it can happen.
Then here are some tips:
Make sure your vehicle is well ventilated, with a
comfortably cool interior.
Keep your eyes moving. Scan the road ahead and
to the sides. Check your mirrors and your
instruments frequently.
If you get sleepy, pull off the road into a rest,
service or parking area and take a nap, get some
exercise, or both. For safety, treat drowsiness
on the highway as an emergency.
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2003 - Safari OM

Recreational Vehicle Towing
Recreational vehicle towing means towing your vehicle
behind another vehicle—such as behind a motorhome.
The two most common types of recreational vehicle
towing are known as“dinghy towing”(towing your
vehicle with all four wheels on the ground) and“dolly
towing”(towing your vehicle with two wheels on
the ground and two wheels up on a device known as a
“dolly”).
Your vehicle was not designed to be towed with any of
its wheels on the ground. If your vehicle must be
towed, seeTowing Your Vehicle on page 4-28.
Notice:Towing an all-wheel-drive vehicle with all
four wheels on the ground, or even with only two of
its wheels on the ground, will damage drivetrain
components. Don’t tow an all-wheel-drive vehicle if
any of its wheels will be on the ground.
Loading Your Vehicle
The Certication/Tire label in your vehicle will look
similar to this example.
The Certication/Tire label is found on the rear edge of
the driver’s door. The label shows the size of your
original tires and the ination pressures needed to obtain
the gross weight capacity of your vehicle.
This is called the Gross Vehicle Weight Rating (GVWR).
The GVWR includes the weight of the vehicle, all
occupants, fuel, cargo and tongue weight, if pulling
a trailer.
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2003 - Safari OM

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............................................5-6
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 Cover...............................................5-17
Engine Air Cleaner/Filter................................5-21
Automatic Transmission Fluid.........................5-22
Engine Coolant.............................................5-25
Radiator Pressure Cap..................................5-27
Engine Overheating.......................................5-28
Cooling System............................................5-30
Engine Fan Noise.........................................5-36
Power Steering Fluid.....................................5-36
Windshield Washer Fluid
................................5-37Brakes........................................................5-39
Battery........................................................5-42
Jump Starting...............................................5-43
All-Wheel Drive..............................................5-48
Rear Axle.......................................................5-49
Front Axle......................................................5-49
Bulb Replacement..........................................5-50
Halogen Bulbs..............................................5-50
Headlamps..................................................5-51
Front Turn Signal Lamps...............................5-54
Taillamps.....................................................5-54
Replacement Bulbs.......................................5-56
Windshield Wiper Blade Replacement..............5-56
Tires..............................................................5-57
Inflation -- Tire Pressure................................5-58
Tire Inspection and Rotation...........................5-58
When It Is Time for New Tires.......................5-60
Buying New Tires.........................................5-60
Uniform Tire Quality Grading..........................5-61
Wheel Alignment and Tire Balance..................5-63
Wheel Replacement......................................5-63
Tire Chains..................................................5-64
If a Tire Goes Flat........................................5-64
Changing a Flat Tire.....................................5-65
Compact Spare Tire......................................5-75
Section 5 Service and Appearance Care
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2003 - Safari OM

Ination -- Tire Pressure
The Certification/Tire label, which is on the rear edge of
the driver’s door, shows the correct inflation pressures
for your tires when they’re cold.“Cold”means your
vehicle has been sitting for at least three hours or driven
no more than 1 mile (1.6 km).
Notice:Don’t let anyone tell you that underination
or overination is all right. It’s not. If your tires
don’t have enough air (underination), you can get
the following:
Too muchexing
Too much heat
Tire overloading
Bad wear
Bad handling
Bad fuel economy
If your tires have too much air (overination), you
can get the following:
Unusual wear
Bad handling
Rough ride
Needless damage from road hazards
When to Check
Check your tires once a month or more.
Don’t forget your compact spare tire. It should be at
60 psi (420 kPa).
How to Check
Use a good quality pocket-type gage to check tire
pressure. You can’t tell if your tires are properly inflated
simply by looking at them. Radial tires may look
properly inflated even when they’re underinflated.
Be sure to put the valve caps back on the valve stems.
They help prevent leaks by keeping out dirt and
moisture.
Tire Inspection and Rotation
Tires should be rotated every 6,000 to 8,000 miles
(10 000 to 13 000 km).
Any time you notice unusual wear, rotate your tires as
soon as possible and check wheel alignment. Also
check for damaged tires or wheels. SeeWhen It Is Time
for New Tires on page 5-60andWheel Replacement
on page 5-63for more information.
Make sure the spare tire is stored securely. Push, pull,
and then try to rotate or turn the tire. If it moves,
use the ratchet/wheel wrench to tighten the cable. See
Changing a Flat Tire on page 5-65.
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2003 - Safari OM

Relays Usage
A/C Relay
(Rear Heat
and A/C)Rear/Heat and Air Conditioning
Upfitter-ACCY
RelayUpfitter Accessory
Starter Enable
RelayStarter
A/C Enable
RelayAir Conditioning
Headlamps
RelayHeadlamps
Fuel Pump
RelayFuel Pump
Fuse/Circuit
BreakerUsage
UPFITTER-BATT Upfitter Battery Power Stud, Trailer
Wiring Harness
UPFITTER-ACCY Upfitter Accessory RelayFuse/Circuit
BreakerUsage
Spare Not used
Spare Not used
Spare Not used
ECM-1B Fuel Pump Relay and Motor, VCM,
Oil Pressure Switch/Sender
HORN Horn Relay and Horn
A/C COMP Air Conditioning Enable Relay and
Compressor
RR HTR/AC Rear Heater and Air Conditioning
ATC Active Transfer Case-L Van
FRT HVAC Front Heater and Air Conditioning
ENG-I Oxygen Sensors, Camshaft Position
Sensor, Mass Air Flow Sensor,
Evaporative Emission Canister Vent
Solenoid
IGN-E Air Conditioning Enable Relay Coil
ECM-I Fuel Injectors 1–6, Crankshaft
Position Sensot, VCM, Coil Driver
Module (EST), Ignition Coil
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2003 - Safari OM

Capacities and Specications
Please refer toPart D: Recommended Fluids and Lubricants on page 6-34for more information. See refrigerant
charge label under the hood for charge capacity information and requirements.
Engine Specications
Engine RPO Transmission Spark Plug Gap Firing OrderWheel Nut
Torque
“Vortec”4300 V6 MFI* LU3 M300.060 inches
(1.52 mm)1–6–5–4–3–2140 lb ft
190Y
*Micro Fuel Injection
Tire Pressures–SeeLoading Your Vehicle on page 4-29.
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2003 - Safari OM

Part B: Owner Checks and Services
Listed in this part are owner checks and services
which should be performed at the intervals specied to
help ensure the safety, dependability and emission
control performance of your vehicle.
Be sure any necessary repairs are completed at once.
Whenever anyuids or lubricants are added to your
vehicle, make sure they are the proper ones, as shown
in Part D.
At Each Fuel Fill
It is important for you or a service station attendant to
perform these underhood checks at each fuelfill.
Engine Oil Level Check
Check the engine oil level and add the proper oil if
necessary. SeeEngine Oil on page 5-13for further
details.
Engine Coolant Level Check
Check the engine coolant level and add DEX-COOL®
coolant mixture if necessary. SeeEngine Coolant
on page 5-25for further details.
Windshield Washer Fluid Level Check
Check the windshield washeruid level in the windshield
washer tank and add the properuid if necessary. See
Windshield Washer Fluid on page 5-37for further details.
At Least Once a Month
Tire Inflation Check
Make sure tires are inated to the correct pressures.
Don’t forget to check your spare tire. SeeTires on
page 5-57for further details.
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2003 - Safari OM