GMC 1997 Safari Owner's Manual page 141

If you experience one or more of these conditions,
change the fuel brand you use. It will require at least one
full tank of the proper fuel to turn the light off.
If none of the above steps have made the light turn off,
have your dealer or qualified service center check the
vehicle. Your dealer has the proper test equipment and
diagnostic tools to fix any mechanical or electrical
problems that may have developed.
Oil Pressure Gage
The oil pressure gage shows
the engine oil pressure in
psi (pounds per square inch)
when the engine is running.
Canadian vehicles indicate pressure in kPa (kilopascals).
Oil pressure may vary with engine speed, outside
temperature and oil viscosity, but readings above the
low pressure zone indicate the normal operating range.
A reading in the low pressure zone may be caused by a
dangerously low oil level or other problems causing low
oil pressure.
I
/i\
CAUT13N:
Don't keep driving if the oil pressure is low.
If
you do, your engine can become so hot that
it
catches fire. You or others could be burned.
Check your oil as soon as possible and have your
vehicle serviced.
I
NOTICE:
Damage to your engine from neglected oil
problems can be costly and is not covered by
your warranty.
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