Engine Oil Pressure Gage
For vehicles with an engine oil pressure gage. It 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 if readings are outside
the normal operating range, the oil pressure light will
come on. SeeOil Pressure Light on page 3-46for more
information.A reading outside the normal operating range may be
caused by a dangerously low oil level or some other
problem causing low oil pressure. Oil should be
checked as soon as possible. See Oil pressure Low
Stop Engine underDIC Warnings and Messages
on page 3-58andEngine Oil on page 5-18.
{CAUTION:
Do not keep driving if the oil pressure is low.
The engine can become so hot that it catches re.
Someone could be burned. Check the oil as soon
as possible and have the vehicle serviced.
Notice:Lack of proper engine oil maintenance can
damage the engine. The repairs would not be
covered by the vehicle warranty. Always follow the
maintenance schedule in this manual for changing
engine oil. United States
Canada
3-47
What Kind of Engine Oil to Use
Look for three things:
GM4718M
This vehicle’s engine requires a special oil meeting
GM Standard GM4718M. Oils meeting this standard
may be identi ed as synthetic. However, not all
synthetic oils will meet this GM standard. Use only
an oil that meets GM Standard GM4718M.Notice:Using oils that do not have the GM4718M
Standard designation can cause engine damage not
covered by the vehicle warranty.
SAE 5W-30
SAE 5W-30 is best for the vehicle. These numbers
on an oil container show its viscosity, or thickness.
Do not use other viscosity oils such as SAE 20W-50.
American Petroleum Institute (API) starburst symbol
Oils meeting these
requirements should have
the starburst symbol on
the container. This symbol
indicates that the oil
has been certi ed by the
American Petroleum
Institute (API).
This vehicle’s engine was lled at the factory with a
Mobil 1
®synthetic oil meeting all requirements for this
vehicle.
Substitute Engine Oil: When adding oil to maintain engine
oil level, oil meeting GM Standard GM4718M might not
be available. You can add substitute oil designated
SAE 5W-30 with the starburst symbol at all temperatures.
Substitute oil not meeting GM Standard GM4718M
should not be used for an oil change.
5-20
Recommended Fluids and
Lubricants
Fluids and lubricants identi ed below by name, part
number, or speci cation can be obtained from your
dealer/retailer.
Usage Fluid/Lubricant
Engine OilThe engine requires a special engine
oil meeting GM Standard GM4718M.
Oils meeting this standard can be
identi ed as synthetic, and should
also be identi ed with the American
Petroleum Institute (API) Certi ed for
Gasoline Engines starburst symbol.
However, not all synthetic API oils
with the starburst symbol will meet
this GM standard. Look for and use
only an oil that meets GM Standard
GM4718M. For the proper viscosity,
seeEngine Oil on page 5-18.
Engine Coolant50/50 mixture of clean, drinkable
water and use only DEX-COOL
®
Coolant. SeeEngine Coolant on
page 5-32.
Intercooler
System
(6.2L V8
Supercharged
Engine)50/50 mixture of clean, drinkable
water and use only DEX-COOL
®
Coolant.
Usage Fluid/Lubricant
Hydraulic Brake
SystemDelco®Supreme 11 Brake Fluid or
equivalent DOT-3 brake uid.
Windshield
WasherOptikleen
®Washer Solvent.
Hydraulic
Clutch SystemHydraulic Clutch Fluid. Use only
GM Part No. U.S. 88958860,
in Canada 88901244, Super DOT-4
brake uid.
Parking Brake
Cable GuidesChassis Lubricant
(GM Part No. U.S. 12377985,
in Canada 88901242) or lubricant
meeting requirements of NLGI #2,
Category LB or GC-LB.
Power Steering
SystemGM Power Steering Fluid
(GM Part No. U.S. 89021184,
in Canada 89021186).
Manual
Transmission
(CTS)SAE 75W-90 GL5 Gear Oil
(GM Part No. U.S. 88862475,
in Canada 88862476).
Manual
Transmission
(CTS-V)Manual Transmission Fluid
(GM Part No. U.S. 88861800,
in Canada 88861801).
Automatic
TransmissionDEXRON
®-VI Automatic
Transmission Fluid.
Transfer Case
(All-Wheel
Drive)Transfer Case Fluid
(GM Part No. U.S. 88861950,
in Canada 88861951).
6-14
