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Buick ROADMASTER 1995 Manual page 122

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Change Oil Indicator
CHANGE
OIL
The amber CHANGE O L
light is activated by the
Engine Oil Life Moniitor
System. The engine oil Me
monitor system determind8
the condition of the engine
oil and lets you know when
the oil should be changed.
See "Engine Oil" in the
Index.
It does thi$ by electronically receiving data from the
Powertrain Control Module. The data it receives
contains information about engine speed (revolutions
per &Ute), coolant temperature and vehicle speed. The
oil life monitor uses this
&&q
. t , ~
determine how much
the oil has degraded.
When to change your oil depend$ an driving habits and
conditibns because these directly affect engine speed,
coolant temperature and vehick speed. Because of this,
the CHANGE OIL light many come on as early as
2,000 miles or less for harsh conditions.
If
the CHANGE OIL light stays on for 20 seconds or
more after you turn on tlie ignition, have the
oil
changed.
After changing the engine oil, the system must be reset.
With the ignition key in the
kUN
position, but the
engine off, fuiiy push and release the accelerator pedal
three times within five seconds. The CHANGE OIL
light will flash two times to
confim you have reset the
system.
If
the CHANGE OIL light comes on and stays
on for five seconds, it did not reset. You'll need to reset
the system again.
Battery Light
When you turn the key to
RUN or START, this red
light will come on briefly,
to show that your alternator
and battery charging
systems are working.
VOLTS
2-64
-
.

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