Answer by
angelaira1 (83)
Dex Cool is the coolant used by the GM factory in all vehicles built after 1996. GM owners have complained that the coolant corrodes and clogs radiators and caps, erodes water pumps, rots radiator hoses, causes chronic overheating, engine damage, and leads to leaky engine gaskets. Mixing Dex Cool with other coolants creates engine sludge.