Geo 1995 Prizm Owner's Manual page 217

Adding Coolant
Add coolant mix at the recovery tank, but be careful not
to spill it.
To Check Coolant
When your engine
is
cold, the coolant level should be at
LOW, or a little higher. When your engine is warm, the
level should be up to FULL, or a little higher.
To Add Coolant
If you need more coolant, add the proper mix at the
coolant recovery tank.
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