Jeep Commander keep shutting off.

I have a 2007 Jeep Commander that shuts off after it has bee driven for maybe 30 minutes.I took my Jeep to the dealer and explained what was happening. They checked it told they could find no problems but suggested I replace the fuel pump.The fuel pump is new, it was just recently replaced. they could not find a solution but was unable to tell me why the car stalls and shuts off. I am wondering if anyone has seen a recall notice on this vehicle?
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