Chevrolet 1993 S-10 Pickup Owner's Manual page 230

Pmb/ems on the Road
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3. Fill the radiator with the proper mix, up to the base of the filler neck.
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.
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6. Start the engine and let it run until you can feel the upper radiator hose
7.
By this time, the coolant level inside the radiator filler neck may be
getting hot. Watch out for the engine fan.
lower. If the level is lower, add more of the proper mix through the filler
neck until the level reaches the base of the filler neck.
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