Car Problem Reports

GMC Suburban 2500 Quick-Connect Fittings For Heater Hoses May Leak Engine Coolant

GMC Suburban 2500 Problem
10 Reports
Me Too

Model Years Affected: 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999

Average Mileage: 96,000 mi (75,000 mi - 117,000 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.

  • Visitor, , 117,000 mi

    Coolant leaking from back of engine traced back to the quick connect fitting in left front top of intake manifold- I plan to replace the hose, or sealing ring if possible, since coolant is leaking from around the rubber ring at end of hose. I thought the leak was coming from a bad intake manifold gasket. What a money saving relief!

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  • Visitor, , 75,000 mi

    Caused heater hose nipple in front part of intake manifold to corrode and required replacement with new threads and larger pipe.

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