Part C: Recommended Fluids And Lubricants - GMC 2003 GMT560 T-Series Owner's Manual

Part C: Recommended Fluids and
Lubricants
Fluids and lubricants identified below by name, part
number or specification may be obtained from your
dealer.
Usage
Engine oil with the letters CI-4 or
CH-4 is 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.
Engine Oil
These letters show American
Petroleum Institute levels of quality.
To determine the preferred viscosity
for your vehicle's diesel engine, see
Engine Oil (DURAMAX™ Diesel) on
page 5-9 .
50/50 mixture of clean, drinkable
water and use only
Engine Coolant
DEX-COOL
Coolant on page 5-16 .
Fluid/Lubricant
®
Coolant. See Engine
Usage
Hydraulic Brake Delco Supreme 11 Brake Fluid or
System equivalent DOT-3 brake fluid.
Windshield
GM Optikleen
Washer Solvent
Clutch Bearing Lubricant (GM Part
Clutch Bearing
No. 12378484 or equivalent NLGI #3
Lubricant
consistency).
Exhaust Brake High-Temperature Grease (GM Part
Ball Joint Cap No. U.S. 1051344, in Canada
Lubricant 903037) or NLGI #3 consistency.
Power Steering DEXRON
System Transmission Fluid.
Synthetic Manual Transmission Fluid
Manual
(GM Part No. U.S. 12345724, in
Transmission
Canada 10953510).
See the Allison
Automatic
Transmission
Transmission
correct transmission fluid.
Multi-Purpose Lubricant, Superlube
Key Lock
(GM Part No. U.S. 12346241, in
Cylinders
Canada 10953474).
Fluid/Lubricant
®
Washer Solvent.
®
-III Automatic
®
Operator's Manual for
6-27