08 Coolant leak at oil filter

[michael1538]

I have an 08 GMC Sierra with almost 29,000 miles and the Duramax/Allison combo. It has developed a small coolant leak on the left rear corner of the engine. As best as I can see, it is coming off of one of the stud/nut assemblies that hold the oil cooler/oil filter mount onto the engine. It only leaks when the outside temp is cold and the engine is cold. Once the engine or the outside temperature warms up, no leak. I have been to the dealer and they have looked at it and researched the service bulliens etc. and cannot find anything to shed light on it. Has anyone had a similar expierence? What was your resolve to the problem? Thanks for any replies in advance.
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[dmaxx3500]

eng oil cooler gasket is prob leaking,go to the dealer it should be covered under warrenty

 

[BoostN]

Since you're still under warranty, it's best to let them deal with it. I would make them keep it until it's fixed, let it stay overnight so they can duplicate the problem if you have to.