User Guide
Adding Equipment
to
the Outside
of
Your Vehicle
Things
you
might add
to
the outside
of
your vehicle can
affect the airflow around
it.
This may cause wind noise
and affect windshield washer performance. Check with
your
GM
dealer before adding equipment to the outside
of your vehicle.
Fuel
Use regular unleaded gasoline rated at
87
octane or
higher.
At
a minimum,
it
should meet specifications
ASTM
D48
14
in
the United States and
CGSB
3.5-M93
in
Canada. Improved gasoline specifications have been
developed by the American Automobile Manufacturers
Association
(
AAMA) for better vehicle performance
and engine protection. Gasolines meeting the AAMA
specification
could
provide improved driveability and
emission
control
system protection compared to
other
ga~)l
i
nes.
Be
SCII-~
the
pos~cl
octane
is
at least 87.
If
the
octane
is
less
than
87.
you
ma,
gct
a heavy knocking noise when
YOLI
driirc.
If’
it‘\
hac1
crlough.
it
can damage your engine.
If you’re using fuel rated at
87
octane or higher and you
still
hear heavy knocking, your engine needs service.
But don’t worry if you hear a little pinging noise when
you’re accelerating or driving up a hill. That’s normal,
and
you
don’t have to buy a higher octane
fuel
to get rid
of
pinging. It’s the heavy, constant knock that means
you
have a problem.
If your vehicle
is
certified to meet California Emission
Standards (indicated on the underhood tune-up label),
it
is designed to operate on fuels that meet California
specifications. If such fuels are
not
available
in
states
adopting California emissions standards, your vehicle
will operate satisfactorily
on
fuels meeting federal
specifications, but emission control system performance
may be affected. The malfunction indicator lamp
on
your instrument panel may turn on and/or your vehicle
may fail a smog-check test.
If
this
occurs, return
to
your
authorized
GM
dealer for diagnosis
to
determine the
cause of failure.
In
the event it
is
determined that
the
cause
of
the
condition
is
the
type
of
fuels used, repairs
may
not
be covered
by
your warranty.
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