GMC 3500 Pickup
Report: Quick-Connect Fittings For Heater Hoses May Leak Engine Coolant
GMC 3500 Pickup Problem
Heating & Air Conditioning Affected: 5.7L V8
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.