Silver Hair

the 3 ft actuating rods, there are 2, one for left side, one for right. The rod simply unclipped itself from red clip assembly. Once you remove tailgate cover, 7 or 8 star head screws or torx screws, you will see this assembly. if you want to lower stuck gate, simply with your 2 hands tug on rods(pull inward) and the gate will come down. When gate is flat, much easir to work on. Use your remote when gate is down to actuate gate locks, this will givd you a understanding of how it works.

The red rubber piece which actuates rod, there is a Green one for the other rod, simply came unclipped, simply clip back in. very straight forward once you remove tailgate plastic cover

I had the same issue, i could hit the remote 20 times and sometimes the tailgate would then work. The issue i found was the long rods ( 3 ft ) that actuate in and out to unlock gate are located behind the tailgate panel, 1 had become unlatched from the actuator mechanism. Simply use a star bit (torx bit) and remove the plastic tailgate plate, underneath the plate you will see the workings of the locking and unlocking sequence. I attached a picture. The dealer quoted me 750, i fixed it in 5 minutes, by simply clicking back in actuator assembly rod, very simple. it must of come unclipped because of how stiff it rides with the crappy OEM Rancho Coil over struts. I hated this new 2019 silverado truck , however since i changed out the original struts, with new rough country brand, it rides better than new now, probably another topic for another day. These struts changed my opinion on my truck in general. i love my new ride and the tailgate working put the cherry on the cake! Again :.just remove tailgate cover, like 7 or 8 star head screws, its pretty simple after that. Physically but not too forceably with both hands pull both rods towards each other to lower tailgate, actuate remote several to see how it works , you will likely notice only one rod of 2 actuating, this is your problem or at least mine was, then work on fix from there. The rubber green and red pieces hold actuating rods in place, mine became unsecured. Just clip back in , problem fixed!!!!!