My 2016 Equinox LT had the same problem as described in the OP's first post. The mylink system was glitchy for a long time. Sometimes the screen would go blank, with only the hvac system working. Although the hvac system worked I could not see the functions, (temp setting, blower speed, etc). The screen would eventually come back on. Then it went out for good. I removed the battery neg cable, pulled fuses, etc. Nothing worked. More than two weeks went by, the dealership was going to call me when they could get me in. One morning I started the Equinox up started backing out of the garage and I pushed the heated seats button for both driver and passenger and (BOOM) the whole Mylink system came back on and has been working like new ever since. Not even glitchy anymore. That was about a month ago now.
Thought I would just throw that info out there.
Last edited by GMTool; 01-18-2020 at 02:46 PM.