GMC Yukon Denali Problem Report

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

(6 reports)

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.

HAD THE SAME "FITTING" PIECE ISSUE. -
Heater core hose quick connect leaking. -