Chevrolet Repair: cooling, heater core, coolants

Question
can you mix green/pink coolants?

Answer
In an emergency you can mix them together but have them flushed out as soon as possible.

 Green coolant is ethylen glycol and pink is extended life dexcool (sometimes orange).  If you mix the two you will eventually get gelling of the cooling system plugging up the heater core and rad.

Wayne