I must admit after owning quite a few GM vehicles with DEXCOOL I'm not a fan of it either. The first thing I did was flush the system and eliminate DEXCOOL all together and replace with regular Polypropylene Glycol. All cooling systems are sealed and pressurized but the main problem is when it comes in contact with air it starts to thicken and clot up. This video shows the job being done on a similar car but the process is the same.
Here is a basic cooling system flush tutorial for you to look at:
I have attached picture step-by-step instructions below to help for your car. Hope this helps and thanks again for using 2CarPros.
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Saturday, July 25th, 2020 AT 3:22 PM