2003 CHEVROLET SILVERADO fuel cap

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.......................................................5-5
Fuels in Foreign Countries...............................5-6
Filling Your Tank............................................5-6
Filling a Portable Fuel Container.......................5-8
Checking Things Under
the Hood......................................................5-8
Hood Release................................................5-9
Engine Compartment Overview.......................5-10
Engine Oil...................................................5-16
Engine Air Cleaner/Filter................................5-21
Automatic Transmission Fluid (Except Allison
Transmission
ž) ..........................................5-23Automatic Transmission Fluid (Allison
Transmission
ž) ..........................................5-26
Manual Transmission Fluid.............................5-28
Hydraulic Clutch...........................................5-29
Engine Coolant.............................................5-30
Coolant Surge Tank Pressure Cap..................5-33
Engine Overheating.......................................5-33
Cooling System............................................5-36
Engine Fan Noise.........................................5-41
Power Steering Fluid.....................................5-42
Windshield Washer Fluid................................5-43
Brakes........................................................5-44
Battery........................................................5-47
Jump Starting...............................................5-48
All-Wheel Drive..............................................5-54
Rear Axle.......................................................5-55
Four-Wheel Drive............................................5-56
Noise Control System.....................................5-58
Tampering with Noise Control System
Prohibited.................................................5-58
Section 5 Service and Appearance Care
5-1

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.
Filling Your Tank
{CAUTION:
Fuel vapor is highly ¯ammable. It burns
violently, and that can cause very bad injuries.
Do not smoke if you are near fuel or refueling
your vehicle. Keep sparks, ¯ames and smoking
materials away from fuel.
The fuel cap is located behind a hinged door on the
driver's side of the vehicle.
5-6

While refueling, hang the fuel cap by the tether using the
hook located on the inside of the ®ller door.
To remove the fuel cap, turn it slowly to the left
(counterclockwise).
{CAUTION:
If you get fuel on yourself and then something
ignites it, you could be badly burned. Fuel can
spray out on you if you open the fuel cap too
CAUTION: (Continued)
CAUTION: (Continued)
quickly. This spray can happen if your tank is
nearly full, and is more likely in hot weather.
Open the fuel 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
Cleaning the
Outside of Your Vehicle on page 5-103.
When you put the fuel 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
Malfunction Indicator Lamp on
page 3-49.
Notice:If you need a new fuel cap, be sure to get the
right type. Your dealer can get one for you. If you get
the wrong type, it may not ®t properly. This may
cause your malfunction indicator lamp to light and
may damage your fuel tank and emissions system.
See ªMalfunction Indicator Lampº in the Index.
5-7

6. Then replace the
pressure cap. Be sure
the pressure cap is
hand-tight and
fully seated.Engine Fan Noise
Your vehicle has a clutched engine cooling fan. When
the clutch is engaged, the fan spins faster to provide
more air to cool the engine. In most everyday driving
conditions, the fan is spinning slower and the clutch is
not fully engaged. This improves fuel economy and
reduces fan noise. Under heavy vehicle loading, trailer
towing and/or high outside temperatures, the fan
speed increases as the clutch more fully engages. So
you may hear an increase in fan noise. This is
normal and should not be mistaken as the transmission
slipping or making extra shifts. It is merely the cooling
system functioning properly. The fan will slow down
when additional cooling is not required and the clutch
disengages.
You may also hear this fan noise when you start the
engine. It will go away as the fan clutch partially
disengages.
5-41

·Tire overloading
·Bad wear
·Bad handling
·Bad fuel economy
If your tires have too much air (overin¯ation), 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.
Also, check the tire pressure of the spare tire.
How to Check
Use a good quality pocket-type gage to check tire
pressure. You can't tell if your tires are properly in¯ated
simply by looking at them. Radial tires may look
properly in¯ated even when they're underin¯ated.Remove the valve cap from the tire valve stem. Press
the tire gage ®rmly onto the valve to get a pressure
measurement. If the cold tire in¯ation pressure is low,
add air until you reach the recommended amount.
If you over®ll the tire, release air by pushing on the metal
stem in the center of the tire valve. Recheck the tire
pressure with the tire gage.
Be sure to put the valve caps back on the valve stems.
They help prevent leaks by keeping out dirt and
moisture.
Dual Tire Operation
When the vehicle is new, or whenever a wheel, wheel
bolt or wheel nut is replaced, check the wheel nut torque
after 100, 1,000 and 6,000 miles (160, 1 600 and
10 000 km) of driving. For proper torque and wheel nut
tightening information, see ªRemoving the Flat Tire
and Installing the Spare Tireº in the index.
The outer tire on a dual wheel setup generally wears
faster than the inner tire. Your tires will wear more
evenly and last longer if you rotate the tires periodically.
See ªTire Inspection and Rotationº earlier in this
section. Also see ªScheduled Maintenance Servicesº in
the Index for scheduled rotation intervals
5-70

ApplicationCapacities
English Metric
VORTECŸ 6000 V8 (Vin N) 6.0 quarts (5.7 L)
VORTECŸ 8100 V8 (Vin G) 6.5 quarts (6.1 L)
Fuel Tank
Short Bed 26.0 gallons (98 L)
Short-Short Box Crew Cab 26.0 gallons (98 L)
Long Bed 34.0 gallons 128 L
Chassis Cab (pickup Box Delete) 34.0 gallons (128 L)
Chassis Cab 350027.0 gallons
23.0 gallons(102 L) (front)
(87 L) (rear)
Chassis Cab 3500 (California)24.0 gallons
23.0 gallons(90 L) (front)
(87 L) (rear)
Chassis Cab 3500 27.0 gallons (102 L (front)
Chassis Cab 3500 (California) 27.0 gallons (102 L) (front)
Chassis Cab 3500HD23.0 gallons
18.0 gallons(87 L) (front)
(68 L) (rear)
Chassis Cab 3500HD 23.0 gallons (87 L) (front)
Air Conditioning Refrigerant Capacity
Air Conditioning Refrigerant R-134a 1.6 lbs (0.7 kg)
5-120

Normal Maintenance Replacement Parts
VIN Code W V T
Oil Filter* PF47 PF44 PF44
Engine Air Cleaner /Filter* A1519C² A1519C² A1519C²
PCV Valve* CV769C CV2001±C CV2001±C
Spark Plugs 41±932*41±974*
/PZTR5A15²²41±974*
/PZTR5A15²²
Fuel Filter* GF626 GF626 GF626
Wiper Blades** 15153642 15153642 15153642
Wiper Blade Type ITTA ITTA ITTA
Wiper Blade Length22 inches
(56.0 cm)22 inches
(56.0 cm)22 inches
(56.0 cm)
*ACDelco
žpart number
** GM part number
***Denso part number
²A1518C high-capacity air cleaner ®lter may be substituted.
²²NGK part number
5-121

VIN Code U N G
Oil Filter* PF44 PF44 PF454
Engine Air Cleaner /Filter* A1518C A1518C A1518C
Passenger Compartment
Air Filter Kit**52485513 52485513 52485513
PCV Valve* CV2001±C CV2001±C Ð
Spark Plugs41±974*
/PZTR5A15²²41±974*
/PZTR5A15²²PTJ14R15***²²
Fuel Filter* GF626 GF626 GF626
Wiper Blades** 15153642 15153642 15153642
Wiper Blade Type ITTA ITTA ITTA
Wiper Blade Length22 inches
(56.0 cm)22 inches
(56.0 cm)22 inches
(56.0 cm)
*ACDelco
žpart number
** GM part number
***Denso part number
²A1518C high-capacity air cleaner ®lter may be substituted.
²²NGK part number
5-122