GMC 2000 Sierra - Manual (Page 167)

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CHECK ENG OIL PRESSURE
This message is displayed
when the engine oil pressure
is low.
See “Oil Pressure Gage” in the Index for more information.
CHECK ENG OIL LEVEL
This message is displayed
when the engine oil level
is low.
Once oil is added, it may need time to drain and settle in
the engine before this message will turn off. It is best to
let the engine cool down (if it is hot) or warm up (if it is
cold) and cycle the ignition to be sure this message turns
off. Refer to the dipstick for the correct level.
See “Engine Oil” in the Index on how to check the oil
level and for what type of oil to add.
CHANGE ENGINE OIL
This message is displayed
when the engine oil needs to
be changed. The message is
only displayed for
15 seconds at the start of
each ignition cycle.
When you change the engine oil, be sure to reset the
Engine Oil Life Monitor. See “Engine Oil, When to
Change” in the Index.
SECURITY
This message is
displayed when the
content theft
- deterrent
system has been activated
and also monitors the
Passlock
R
System.
If the security message is displayed continuously while
driving and stays on, there may be a problem with the
Passlock System. Your vehicle will not be protected by
Passlock, and you should see your GM dealer.