GMC 1995 Safari Owner's Manual page 231

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