My tailgate had been open a couple of times.
I didn't think I'd hit the button, but of course I might have.
It didn't seem to ever be related to weather /water intrusion at the tailgate switch.
I did, and still do, keep crap in the spot under the switches (and I'm still pissed about loosing the console space to the shifter). Always seems to be something that gets put in the space each time I get in the truck.
(on this one, the bed cover prevents the tailgate from immediately dropping, even it is unlatched -- so unlatched while parked it might probably won't drop until jiggled while driving)
Anyway, a few months ago, the truck got the switch on the tailgate replaced under the recall
It hasn't happened since.
Coincidence? I don't know.
Were there two problems?
I'm wondering if they have also changed the programming to require a slightly longer press or the tailgate release button for the latch to release. Would reduce the probability of accidental button push activating the release.
Extra 'fob button push time requirement' corrected a similar issue with the fob and trunk release on the early builds of the most recent generation of impala.