California Fuel
If the vehicle is certi ed to meet California Emissions
Standards, it is designed to operate on fuels that meet
California speci cations. See the underhood emission
control label. If this fuel is not available in states adopting
California emissions standards, the vehicle will operate
satisfactorily on fuels meeting federal speci cations, but
emission control system performance might be affected.
The malfunction indicator lamp could turn on and the
vehicle might fail a smog-check test. SeeMalfunction
Indicator Lamp on page 3-43. If this occurs, return to your
authorized dealer/retailer for diagnosis. If it is determined
that the condition is caused by the type of fuel used,
repairs might not be covered by the vehicle warranty.
Additives
To provide cleaner air, all gasolines in the United States
are now required to contain additives that help prevent
engine and fuel system deposits from forming, allowing
the emission control system to work properly. In most
cases, you should not have to add anything to the 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 the vehicle experiences
problems due to dirty injectors or valves, look for gasolinethat is advertised as TOP TIER Detergent Gasoline. Also,
your dealer/retailer has additives that will help correct and
prevent most deposit-related problems.
Gasolines containing oxygenates, such as ethers and
ethanol, and reformulated gasolines might be available in
your area. We recommend that you use these gasolines,
if they comply with the speci cations 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:This 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 the
vehicle warranty.
Some gasolines that are not reformulated for low
emissions can contain an octane-enhancing additive
called methylcyclopentadienyl manganese tricarbonyl
(MMT); ask the attendant where you buy gasoline
whether the fuel contains MMT. We recommend against
the use of such gasolines. Fuels containing MMT can
reduce the life of spark plugs and the performance of
the emission control system could be affected. The
malfunction indicator lamp might turn on. If this occurs,
return to your dealer/retailer for service.
5-7
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)
All-wheel-drive vehicles: Change
transfer case uid (normal service).
See footnote (q).•
CTS-V Only: Change hydraulic clutch
uid.See footnote (o).• •••••
CTS-V Only: Change rear axle uid
(severe service only).See footnote (o).•••
CTS-V Only: Change brake uid
(severe service only).See footnote (o).• •••••
Replace spark plugs.An Emission
Control Service.•
Engine cooling system service (or every
ve years, whichever occurs rst).
An Emission Control Service.
See footnote (i).•
6.2L Supercharged V8 Engine:
Intercooler system service (or every
ve years, whichever occurs rst).
See footnote (p).•
Inspect engine accessory drive belt.
An Emission Control Service.
See footnote (m).•
6-7
Maintenance Replacement Parts
Replacement parts identi ed below by name, part number or speci cation can be obtained from your dealer/retailer.
Part GM Part Numbers ACDelco Part Numbers
Engine Air Cleaner/Filter
3.6L V6 Engine 15875795 A3096C
6.2L V8 Engine 25898499 A3105C
Engine Oil Filter
3.6L V6 Engine 25177917 PF2129
6.2L V8 Engine 89017524 PF48
Passenger Compartment Air Filter Element 19130403 CF133
Spark Plugs
3.6L V6 Engine 12597464 41-990
6.2L V8 Engine 12571165 41-104
Wiper Blades
Driver Side – 22 in (56.5 cm) 15890056 —
Passenger Side – 21 in (53.3 cm) 15890057 —
6-16
