Good Afternoon Gardent:
If your engine requires that you use Dexcool, then do not deviate from
that requirement. I own two Cadillacs (1995 STS - Green Antifreeze;
2004 DTS - Dexcool). GM recommends that the proper antifreeze be
poured into your vehicle.
The check coolant light could indicate a leak somewhere in your
cooling system. Check your surge tank to see if you have the proper
level of fluid. If it is low, then fill to the proper level, and when
you park the car for the evening, place newspaper under front section
of your car. Remove the newspaper before starting your car the next
morning as not to start a fire, and examine the spot or spots to see
if there any for coolant and/or oil on the newspaper.
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