My at4 does not have black side mirrors?

[KTX556]

Hey yall, I'm new here and maybe this question has already been answered, but I recently bought a used 2019 gmc at4, its white and its fully loaded beside the sunroof. I noticed that the side mirrors are not black like the other at4 I've seen. Theres chrome on the top portion of the mirror. I personally think the chrome looks better because it compliment the grill. Ive seem more at4 with black side mirrors than chrome, just curious to see if anyone bought a brand new at4 with chrome side mirrors or maybe I got played? thanks yall.

[redwngr]

AT4 may have had optional mirrors available.

 

In  any case they could have been changed by the previous owner. 

 

GM accessories has a selection of covers available for 2019's

https://accessories.gmc.com/search?year=2019&make=GMC&model=Sierra 1500&modelId=548&body=Crew Cab Pickup&bodyId=22&wheel=Short Box&wheelId=651&trim=AT4&trimId=5102&drive=4WD&driveId=8&engine=5.3L V8 GAS&engineId=2059&bodyNumDoors=5&categoryId=98023

[MG386]

the black mirror caps are a dealer installed option.  They ship with chrome and the dealer is supposed to install the black caps, as well as side steps, floor mats etc..  maybe the dealer never installed, or maybe the previous owner changed back to chrome