The GM factory tow mirrors as mentioned do not have power extend, nor do they have power fold. If you current mirrors have power fold, make sure the if you replace them that the tow mirrors are compatible as there are (were when I bought my factory tow mirrors) 2 versions. If you do have the power fold mirrors I think you have to have the BCM reprogrammed as well last I knew.
If you have to have the power fold, then you are limited to the after market models like APT or others have mentioned.
Congrats on the new truck!