Chevrolet 2000 C-Series Owner's Manual page 112

Change Oil Light (If Equipped)
If the CHANGE OIL light comes on and stays on after
you start the engine, have the oil changed.
For additional information, see "Engine Oil, When to
Change" in the Index. To reset the Oil Life Monitor, see
"Engine Oil Life Monitor" in the Index.
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The CHANGE OIL light
should come on briefly as a
bulb check when you start
the engine. If the light
doesn't come on, have
it serviced.
Reduced Engine Power Warning Light
If the REDUCED ENGINE POWER light is on, but
there is no reduction in performance, proceed to your
destination. The performance may be reduced the next
time the vehicle is driven. The vehicle may be driven at
a reduced speed while the REDUCED ENGINE
POWER light is on, but acceleration and speed
may be reduced.
Anytime the SERVICE ENGINE SOON light stays on,
the vehicle should be taken to an authorized GM dealer
as soon as possible for service.
If the SERVICE ENGINE
SOON and REDUCED
ENGINE POWER lights are
on, a noticeable reduction in
the vehicle's performance
may occur.