Below you can find some additional information on an io6 upgrade for a 2015 Colorado/Canyon. 

You can see the store page by clicking here.

The picture above shows the location of where the HMI module is located.

The picture below shows a 3D model of the dash as a reference point. 


Attached are two PDF files that show some additional information about the unit. 

The first file (INST95) should be used as a reference point in assistance in removing the dash,

 while the second PDF (2015MyLinkDetails..)simply shows additional information about the io6 module and it's capabilities.