GMC 2003 Envoy - Manual (Page 169)

Oil Pressure Gege
The oil pressure gage shows the engirre oil pressure in
p&l (pounds pgr square inch) when Ihe engine is
running. Canadian \/ehfcles indicate pressure in kPa
(kilopascels).
A CAUTION:
Don't keep driving If Ihe oil pressure Is low.
If you do^ your engine c^n become so hoi lhat
it catches fire. You or others could be burned.
Check youf oil as soon as possible and have
your vehicle serviced.
Noticer Damage to your engine from neglected oil
problems can be costty and is not covered by
your warranty.
Oil pressure may vary with engine spaed, outside
lemperature 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 tow oil level or other problems causing
igw oil pressure
3-M