Recommended Fluids and
Lubricants
Fluids and lubricants identified below by name, part
number or specification may be obtained from your
dealer.
Usage
Fluid/Lubricant
Engine Oil
(Diesel Engine)
Engine oils with the letters CI-4 or
CH-4 are best for your vehicle. The
CI-4 or CH-4 designation may
appear either alone, or in
combination with other API
designations, such as API CI-4/SL.
These letters show American
Petroleum Institute (API) levels of
quality. GM Goodwrench
®
oil meets
all the requirements for your vehicle.
To determine the preferred viscosity
for your vehicle’s diesel engine, see
Engine Oil on page 5-16.
Engine Coolant
50/50 mixture of clean, drinkable
water and use only
DEX-COOL
®
Coolant. See Engine
Coolant on page 5-25.
Usage
Fluid/Lubricant
Hydraulic Brake
System
Delco Supreme 11 Brake Fluid or
equivalent DOT-3 brake fluid.
Windshield
Washer Solvent
GM Optikleen
®
Washer Solvent.
Hydraulic
Clutch System
(5-Speed
Trans.)
Hydraulic Clutch Fluid
(GM Part No. U.S. 12345347, in
Canada 10953517) or equivalent
DOT-3 brake fluid.
Hydraulic
Clutch System
(6-Speed
Trans.)
Hydraulic Clutch Fluid. Use only
GM Part No. U.S. 88958860,
in Canada 88901244, Super DOT-4
brake fluid.
Power Steering
System
GM Power Steering Fluid
(GM Part No. U.S. 89021184, in
Canada 89021186).
Manual
Transmission
(5-Speed with
Low Gear,
RPO MW3)
GM Goodwrench
®
Synthetic Manual
Transmission Fluid
(GM Part No. U.S. 12346190, in
Canada 10953477) or equivalent
SAE 75W-85 GL-4 gear oil.
6-13
