08 H2 stalling

[AshleyinTX]

It stalled on me three times again today. The engine was cold (as was the case the first time it stalled). I was trying to back it out of a parking stop. Engine was difficult to fire (took 15 seconds of sitting on the starter). Engine finally started, when i shifted to reverse, rpms dropped and it died. I repeated this three times until I finally got it to reverse and not die. I'm taking it to the dealership in the morn. My husband thinks it's a bad fuel pump. Your thoughts?