Have it flushed and get away from the Dex Cool in my opinion. My oldest son’s 96 Camaro used to sludge up badly on DC and I got tired of flushing it every year or so. There were zero leaks in the system and it was always properly bled with not even a single drop of coolant loss or any air bubbles.
After the last DC flush I started using the green over 8 years ago and any sludge problems are total history. The radiator and overflow bottle is just as clean today as it was when converted way back when.