spark plugs GMC SIERRA 2007 Owner's Manual

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. In most cases,
you should not have to add anything to your fuel.
However, some gasolines contain only the
minimum amount of additive required to meet U.S.
Environmental Protection Agency regulations.
To help keep fuel injectors and intake valves clean,
or if your vehicle experiences problems due to
dirty injectors or valves, look for gasoline that is
advertised as TOP TIER Detergent Gasoline. Also,
your dealer has additives that will help correct
and prevent most deposit-related problems.
Gasolines containing oxygenates, such as ethers
and ethanol, and reformulated gasolines may
be available in your area. General Motors
recommends that you use these gasolines if they
comply with the specications described earlier.However, E85 (85% ethanol) and other fuels
containing more than 10% ethanol must not
be used in vehicles that were not designed for
those fuels.
Notice:Your vehicle was not designed for
fuel that contains methanol. Do not use
fuel containing methanol. It can corrode metal
parts in the fuel system and also damage
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 recommends against 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 dealer for service.
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Additional Required Services (cont’d)
Service and Miles (Kilometers)25,000
(40 000)50,000
(80 000)75,000
(120 000)100,000
(160 000)125,000
(200 000)150,000
(240 000)
Four-wheel drive only: Change transfer
case uid (extreme duty service).See
footnotes (g) (l) and (m).• •••••
Four-wheel drive only: Change transfer
case uid (normal service).See
footnotes (g) and (m).•••
Inspect evaporative control system.
An Emission Control Service. See
footnotes † and (k).•••
Replace spark plugs and inspect spark
plug wires.An Emission Control
Service.•
Engine cooling system service (or every
ve years, whichever occurs rst).
An Emission Control Service. See
footnote (i).•
Inspect engine accessory drive belt.
An Emission Control Service. See
footnote (q).•
628

Normal Maintenance Replacement Parts
Replacement parts identied below by name, part number, or specication can be obtained from your
GM dealer.
If your vehicle has the DURAMAX
®diesel engine, see the DURAMAX®Diesel manual for
more information.
Part GM Part Number ACDelco®Part Number
Engine Air Cleaner/Filter
High Capacity 15908915 A1518C
Standard 15908916 A1519C*
Oil Filter
4.3L V6 25010792 PF47
4.8L V8; 5.3L V8; 6.0L V8 89017524 PF48
Spark Plugs
4.3L V6 89017883 41-932
4.8L V8; 5.3L V8; 6.0L V8 12571164 41-985
Wiper Blades – 21.6 inches (55.0 cm) 15930910 —
*A1518C high-capacity air cleaner lter may be substituted.
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