What is This?

[TheDefiantII]

2022 Silverado TB with Duramax. What cooler/radiator is this? Located below the main radiator. Pictures looking from ground upward. Also, it has a plastic flap that only snaps into place when closed. Never stays closed. Looks unfinished. Is something missing? I've checked other Trail Boss trucks on the lot and they didn't not have this radiator. Only empty slot. May be part of Duramax package or trailering option. Anyone?

Bottom of silver radiator with flap open

Plastic flap closed

Plastic flap open (hanging on hinge). Usually ends up this way after driving.

 

[That21TrailBossguy]

Transmission cooler?

 

[tommysf13]

you get this solved or even on here ? I had to replace it on a 19 custom. found it to be a radiator baffle(you pics look familiar). snaps to the bottom of the radiator and held by plastic push pins.