2008 Suburban liftglass & wiper won't work
 

Our 2008 Chevy Suburban developed issues with everything on the liftgate. The wiper won't work, the glass won't open and the defroster won't work. I've checked every fuse at the dash and under the hood and nothing's blown. I considered opening up the liftgate panel, but a couple posts say that it can't be removed without opening the glass.
It doesn't seem likely that all the wires would short out or break at the same time from normal usage. Is there a plug/connector somewhere that could have come undone?

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