2003 CHEVROLET SILVERADO spark plugs

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

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

100,000 Miles (166 000 km)
qInspect spark plug wires.An Emission Control
Service.
qReplace spark plugs.An Emission Control Service.
qChange automatic transmission ¯uid and ®lter if
the vehicle's GVWR is over 8600 lbs, if the
vehicle has an Allison transmission or if the vehicle is
mainly driven under one or more of these conditions:
þ In heavy city traffic where the outside
temperature regularly reaches 90ÉF (32ÉC) or
higher.
þ In hilly or mountainous terrain.
þ When doing frequent trailer towing.
þ Uses such as found in taxi, police or delivery
service.
qIf you haven't used your vehicle under severe service
conditions listed previously and, therefore, haven't
changed your automatic transmission ¯uid, change
both the ¯uid and ®lterqAutomatic Transfer Case Only: Change transfer case
¯uid
qExcept 8.1L V8 Engine: Inspect Positive Crankcase
Ventilation (PCV) valve.
An Emission Control
Service.
150,000 Miles (240 000 km)
qDrain, ¯ush and re®ll cooling system (or every
60 months since last service, whichever occurs ®rst).
See
Engine Coolant on page 5-30for what to use.
Inspect hoses. Clean radiator, condenser, pressure
cap and neck. Pressure test the cooling system
and pressure cap.
An Emission Control Service.
qChange ®ve-speed manual transmission ¯uid (with
4300 V6 or 4800 V8 engines only).
qInspect engine accessory drive belt.
An Emission
Control Service.
200,000 Miles (332 000 km)
q6000 V8 Engine Only: Change ®ve-speed manual
transmission ¯uid.
6-11