Auto Locking Tailgate Issue

[GTBensley]

Morning All,  just picked up my first Chevy vehicle, a 2016 2500HD  LT Crew Cab. When hitting the key fob to lock or unlock my doors I can hear the tail gate attempting to do the same action, yet it always stay unlocked. When using the key into the gate it feels like its just turning an electronic tumbler but I can not get the gate to lock in that fashion either. I know I can take it to the dealer for this issue but wanted to try and figure it out myself if its something simple. Anyone run into this issue before? Is it broken or am I just using it incorrectly? I appreciate the responses, thank you. 

[MNorby]

Factory or aftermarket tailgate lock?

[GTBensley]

Believe its factory 

[redwngr]

Remote locking tailgate was standard on 2016 2500 LT and above.

 

Available on WT.  (WT had the key operated lock as standard)

[GTBensley]

Well I guess I'll pull it apart as something isn't working in there. 

[MNorby]

I've seen tricks on the Pop n Lock aftermarket lock to make work better, not sure if mechanism is the same on the factory style but might be worth investigating. 

[GTBensley]

Some issue with the solenoid according to the dealer, they ordered me a new one. It just goes to the unlocked position all by itself every time.