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Flush cooling system every 60,000 miles on Chevrolet Trailblazer

Problem Description and Possible Solution

GM recommends replacing the engine coolant at 100,000 miles; however, our technicians tell us that the coolant may become contaminated and require a complete cooling system flush every 60,000 to 70,000 miles.

Problem Data
RepairPal Verified
Average mileage: (–)
8 model years affected: 2002, 2003, 2004, 2005, more2006, 2007, 2008, 2009
8 people reported this problem