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Overheating and/or Coolant Loss Due to Leaking Quick-Connect Fitting on GMC Yukon Denali

Problem Description and Possible Solution

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.

Problem Data
RepairPal Verified
Average mileage: 128,750 (90,000–170,000)
6 model years affected: 1999, 2000, 2005, 2006, more2007, 2011
8 people reported this problem
Viewing 1 - 3 of 3 comments
Had this problem and you need a special tool to take it off cost me $100. Apparently I've had almost ALL these problems listed on this site. GM is a crap cars of America. Last time ever buying a $60k pile of junk from them.
HAD THE SAME "FITTING" PIECE ISSUE.
Heater core hose quick connect leaking.