Daniel Garcia possibly disconnected linkage from the door handle to the lock. See if you can open it from the inside. Let us know if you feel the same resistance as usual when moving the door handle or if it feels loose. Let us know what year your Tahoe is as well.
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The attached document shows how to remove the panel and what the linkage looks like etc. For now a nice to know since you most certainly can't get to it with the door closed. [document|3918]
Daniel Garcia possibly disconnected linkage from the door handle to the lock. See if you can open it from the inside. Let us know if you feel the same resistance as usual when moving the door handle or if it feels loose. Let us know what year your Tahoe is as well.