Car Problem Reports

GMC Yukon Denali Quick-Connect Fittings For Heater Hoses May Leak Engine Coolant

GMC Yukon Denali Problem
5 Reports
Me Too

Model Years Affected: 1999, 2000, 2005, 2006

Average Mileage: 164,000 mi (158,000 mi - 170,000 mi)


The quick-connect fittings for the heater hoses tend to leak engine coolant. This problem commonly occurs because the metal housing has become brittle, which can break and cause leaks.

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