Chevrolet 2001 S10 Pickup Owner's Manual page 248

3. Fill the radiator with the proper DEX
coolant mixture, up to the base of the filler neck.
See "Engine Coolant" in the Index for more
information about the proper coolant mixture.
R
-
COOL 4. Then fill the coolant recovery tank to the ADD mark.
5. Put the cap back on the coolant recovery tank, but
leave the radiator pressure cap off.
5-15