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GMC
Yukon Denali
12

Contamination of extended life coolant on GMC Yukon Denali

Problem Description and Possible Solution
Extended life coolant may become contaminated and require cooling system service before the recommended 100,000 miles.
Problem Data
RepairPal Verified
Average mileage: (–)
12 model years affected: 1999, 2000, 2001, 2002, more2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
12 people reported this problem