Overheating and/or Coolant Loss Due to Leaking Quick-Connect Fitting on GMC Suburban 1500

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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Average mileage: 177,972 (125,000–217,000)
8 model years affected: 1992, 1993, 1994, 1995, more1996, 1997, 1998, 1999
18 people reported this problem
6 people shared problem details
Engine leaking coolant, white steam in exhaust. replaced intake manifold gasket and bad coolant hose connector fitting.
Heater hose quick connect fitting leak on intake side problem not repaired
Took it to mechanics shop, there were other issues with it, don't if I will keep it... :(
slight coolant leak for about 6 days, then on cold engine start- threaded end of heater hose adapter broke off-hope I can fix it for cheap (ain't nothing cheap any more, but I can still hope
I tried to replace it when it started leaking. Ended up breaking off in the manifold. Had a wicked time getting the rest out of the manifold.
happened to me ,then when I tried to remove it I broke the cast aluminum manifold,cost manifold 50.00 gasket set50.00 plus labor uuurrg

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