My advice is to either try to get CC parts out of a salvage yard or buy a factory kit, if you can find one like this that works with your car:
(I linked a first generation kit, but I don't know if it fits yours, that catalog didn't offer accessories for 2013 models)
https://www.gmoutletparts.com/oem-parts/gm-cruise-control-94536705
I've never met an aftermarket cruise control I liked, but maybe they can manage a throttle intelligently these days.
(I linked a first generation kit, but I don't know if it fits yours, that catalog didn't offer accessories for 2013 models)
https://www.gmoutletparts.com/oem-parts/gm-cruise-control-94536705
I've never met an aftermarket cruise control I liked, but maybe they can manage a throttle intelligently these days.