X2 on the floormats. Weathertechs are the bee's knees and should be a factory option now a days.

Motorola that clips on visor works well.

The mic in my 2015 LTZ duramax has HELPED me make many misdials......................

Love everything else in this truck except this.

We haven't had many complaints for that…at least not that I'm aware of.

It seems the most common issues are with people with i-phones…there seems to be a ghost in the machine somewhere…the droid stuff for the most part has hooked up without hassle

No word back from our OnStar rep…I'll rattle her chain again tomorrow.

No thanks necessary, I was curious what she would find...

She emailed me today.

She isn't aware of any available upgrades to the system but is going to verify her info and make sure there isn't anything coming in the near future that can be retrofitted ….

Sorry I wasn't more help

My 2015 ltz is mostly fine. As with anything electronic once in a while there is a gremlin but not enough to be an issue. Lol iPhone here also.