Second row seat flipping down unprovoked

[olmie]

I recently got a 2018 Yukon XL Denali. I had a substantial aftermarket stereo installed (used M650-GM KIT to preserve factory head unit & amplifier while providing RCA pre-amp outputs to aftermarket amplifiers, and car was substantially rewired with 0g power wires, re-wiring all aftermarket speakers, etc.)

Since the install, the vehicle has an odd issue: Whenever I put the vehicle into drive, the second row seat (on driver's side) flips down, with no provocation. Does anyone have any insight on some setting or wiring that could cause this issue? Thanks in advance

 

[Doubeleive]

I could suggest going to whoever did your install and have them disconnect your head unit from the harness and see if you still get the seat issue with the head unit out of the picture, atleast that way you will know if it is related or not, optionally you may be able to just pull the radio fuse and see what happens you will have to reset all your settings and it may not make any difference still being on the harness but it's just a idea to throw around