Review on GM Genuine Parts 20837 🔧 Radiator: Reliable and Authentic Cooling Solution by Brent Borseth

99 S10 Blazer 4.3 with automatic transmission and 4WD. The original radiator lasted 20 years and 130,000 miles. Purchased aftermarket radiators from two world-renowned auto parts stores, both selling under reputable brands. The AT fluid and oil cooler fittings were so poorly machined that the lines would not snap. I even removed the fittings and snap clamps, oiled the o-ring and steel wool, and cleaned the end of the line. So I couldn't plant the Autobahns to the end. As a result I ordered an AC Delco radiator here, switched the old fixtures to a new radiator. The lines snapped into the old fittings. Yes, the new radiator no longer has working drainage as noted by other reviews.