coolant

I was reading about different brands of coolant and found out the brand i am suppose to use is the worst one. Can anyone recommend a good coolant for both a 05 grand am and an 01 impala?

Try Prestone Extended Life antifreeze. It will work with all coolant types and is much better than DexCool for your engine. You can replace the Dex with this if you flush the system or drain out as much as you can and replace it with the Extended Life Antifreeze.