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Recommended Fluids and
Lubricants
This maintenance section applies to vehicles with a
gasoline engine. If your vehicle has a diesel engine, see
the maintenance schedule section in the DURAMAX
®
Diesel manual.
Fluids and lubricants identified below by name, part
number, or specification can be obtained from your
dealer/retailer.
Usage Fluid/Lubricant
Engine Oil
Engine oil which meets GM
Standard GM6094M and displays
the American Petroleum Institute
Certified for Gasoline Engines
starburst symbol. To determine the
proper viscosity for your vehicle’s
engine, see Engine Oil on
page 5-15.
Engine Coolant
50/50 mixture of clean, drinkable
water and use only DEX-COOL
®
coolant. See Engine Coolant on
page 5-29.
Hydraulic Brake
System
DOT 3 Hydraulic Brake Fluid
(GM Part No. U.S. 12377967, in
Canada 89021320).
Windshield
Washer
Optikleen
®
Washer Solvent.
Usage Fluid/Lubricant
Power Steering
System
GM Power Steering Fluid
(GM Part No. U.S. 89021184, in
Canada 89021186).
Automatic
Transmission
DEXRON
®
-VI Automatic
Transmission Fluid.
Key Lock
Cylinders
Multi-Purpose Lubricant, Superlube
(GM Part No. U.S. 12346241, in
Canada 10953474).
Floor Shift
Linkage
Lubriplate Lubricant Aerosol
(GM Part No. U.S. 12346293, in
Canada 992723) or lubricant
meeting requirements of NLGI #2
Category LB or GC-LB.
Chassis
Lubrication
Chassis Lubricant
(GM Part No. U.S. 12377985, in
Canada 88901242) or lubricant
meeting requirements of NLGI #2,
Category LB or GC-LB.
Front Axle
(1500 Series) -
Four-Wheel
Drive
SAE 80W-90 Axle Lubricant
(GM Part No. U.S. 89021671, in
Canada 89021672).
Front Axle
(1500,
2500 HD, and
3500 HD
Series)
SAE 75W-90 Synthetic
Axle Lubricant
(GM Part No. U.S. 89021677,
in Canada 89021678) meeting
GM Specification 9986115.
6-15