The video above provides a great tutorial on how you can upgrade the CUE in your Cadillac. They mention the tools you’ll require in order to get the job done. There are also directions on how to remove the parts needed to upgrade the CUE.
There is mention of a “HMI control module“. Well I’ve found an OEM one over on Amazon for around $197.99 with FREE shipping.
ASIN: B01A9J5NH6