2021 Yukon Rear Blend Door reset/replacement

[DenaliDrew]

Hi folks, I see some great videos on this procedure with older trucks, but does anyone have any pics or video for the location and replacement of the rear blend door actuators for a 2021 Yukon XL Denali?
I am experiencing nothing but cold air in the back, regardless of settings. I believe I have a stuck or bad rear blend door actuator. GM Parts says there are two - a right side (13554362) and a left side (13554363). I'm not sure which one I need and I'd rather not go through the trouble of doing both.

 

[DenaliDrew]

Dealer quoted me $550. I think both parts were like $50 together. That seems a bit high.

 

[Josh623]

Dealer quoted me $550. I think both parts were like $50 together. That seems a bit high.

did you ever get this worked out? from my research those two (left and right) you mentioned are for the front, not the rear... the rear seems like it only has one (13554364).

 

[Fless]

did you ever get this worked out? from my research those two (left and right) you mentioned are for the front, not the rear... the rear seems like it only has one (13554364).

The OP hasn't been on here since late December, unfortunately.