ok disconnected the battery for 20 minutes and then tried to reset the liftgate - what do they mean by "manually close and fully latch the liftgate" Doesn't that just mean shut it by hand or does the fully latch mean I need to lock the doors?

Anyhow, I opened and closed it; then used the keyfob and it worked fine so I went in the house. My son went out to walk the dog and asked me why I had the liftgate open? !!!!!! WTH? Do I need to lock the doors to keep this from happening or is some idiot hiding in my bushes with their fob sync'd to my truck just messing with me?