Oldsmobile 2002 Bravada - Manual (Page 148)

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Check Gages Light
United States Canada
The CHECK GAGES light will come on briefly when
you are starting the engine.
If the light comes on and stays on while you are
driving, check your coolant temperature and engine oil
pressure gages.
Gate Ajar
United States Canada
If this light comes on, your liftgate or liftglass is ajar.
Try closing the liftgate or liftglass again. Never drive
with the liftgate or liftglass even partially open.