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GMC Yukon XL 2500 Problems

Contamination of extended life coolant on GMC Yukon XL 2500

Problem Description and Possible Solution

Extended life coolant may become contaminated and require cooling system service before the recommended 100,000 miles.
(11 people reported this problem)

GMC Yukon XL 2500 Vehicles With This Problem

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Average mileage: (–)
11 model years affected: 2000, 2001, 2002, 2003, more2004, 2005, 2006, 2007, 2008, 2009, 2010
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Brake problem? Or maybe a faulty head gasket cylinder?
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