Intermittent problem. All four doors and tailgate fail to lock/unlock. True if using FOBs (2), door panel switches (2) or reaching automatic speed (20 mph). Lights don’t flash when FOB is operated. Acts like battery is disconnected or exhausted. Two hours later, all is well. Happened again about one month later, same exact symptoms, but self-cured in 15 minutes. It was above freezing the second time. Last 8 of VIN: gs162324. Dealer could not reproduce the problem and found no error codes. What component or situation could cripple everything related to the electronic lock/unlock feature - intermittently? Thanks!!!