Dexcool
You could always switch to Green stuff. Just flush it real good, then use the Green.
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Im on my 3rd ls1 camaro and have never had any problems with dexcool.
Pull the battery out, undo the coolant reservoir and rinse it out with the garden hose and refill with fresh dexcool. Also blow through the rubber hose from the reservoir to the radiator neck. if you haven't done it, open the drain **** on the radiator and drain it and refill with fresh coolant. No matter what antifreeze you are using after 10 years what do you expect? It needs to be serviced.
Pull the battery out, undo the coolant reservoir and rinse it out with the garden hose and refill with fresh dexcool. Also blow through the rubber hose from the reservoir to the radiator neck. if you haven't done it, open the drain **** on the radiator and drain it and refill with fresh coolant. No matter what antifreeze you are using after 10 years what do you expect? It needs to be serviced.






