User Guide
Engine
Oil
Additives
Don't add anything
to
your oil. Your
GM
dealer
is
ready
to
advise if you think something should be added.
When
to
Change Engine Oil
If any one of these is true
for
you. use the short tripkity
.
maintenance schedule:
a
a
a
0
a
Most
trips are less than
5
to
10
miles
(8
to 16
km).
This is particularly important when outside
temperatures are below freezing.
Most trips include extensive idling (such
as
frequent
driving in stop-and-go traffic).
You operate
your
vehicle
in
dusty areas
or
off-road frequently.
You frequently tow
a
trailer or use
a
currier on top
of
your vehicle.
The vehicle is used for delivery service. police, taxi
or other commercial application.
Driving under these conditions causes engine oil
to
break down sooner.
If
any one
of
these
is
true for your
vehicle, then you need
to
change your oil and filter
every
3.000
miles
(5
000
km)
or
3
months
--
whichever
occllrs first.
If
none
of
them is true, use the long trip/highway
maintenance schedule. Change the oil and filter every
7,500
miles
(
12
500
km)
or
12
months
--
whichever
occurs first. Driving
a
vehicle
with
a
fully
warmed
engine under highway conditions causes engine oil
to
break down slower.
Remote Oil Filter (Four-wheel Drive)
The access door for
the
remote oil filter is
in
the steering
linkage shield assembly located under the radiator
support.
Twist
the
screw
to
unlock
or
lock the door.
Make sure
if
you
open the door.
it
is securely closed
when
~OLI
are finished.
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