Chevrolet TRACKER 2002 Owner's Manual page 230

2. Then keep turning the pressure cap, but now push
down as you turn it. Remove the pressure cap.
5-16
3. Fill the radiator with the proper coolant mixture, up
to the base of the filler neck. See "Engine Coolant"
in the Index for more information about the proper
coolant mixture.
4. Then fill the coolant recovery tank to the FULL mark.
5. Put the cap back on the coolant recovery tank,
but leave the radiator pressure cap off.