Chevrolet 2001 Express Van Owner's Manual page 251

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
FULL COLD mark.
5. Put the cap back on the coolant recovery tank, but
leave the radiator pressure cap off.
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