No but do find mine has more road noise than C6 and was thinking of maybe trying a cargo mat.
If your concern is noise possibly some have had success with the mat .
I used Dynamat. There are other lighter options out there. The sound insulation does help with reducing road noise. I applied it behind the seats and the entire rear area. Non runflat tires also help.
Thanks for all the help and suggestions , picked up Kilmat sound deadened , winter/ spring project ; install under seats , rear cargo area and do inner and outer rear wheel wells....and probably another layer of heat shield between floor and exhaust/transmission too
Upon further research, not going to remove exhaust to replace factory heat shield....GM used a “NASA” product they used in the space industry’Aerogel’, from what I read about it , it’s about the best you can do with a small amount of space/clearance underneath , will use a layer of ‘Kilmat’ and then a layer of ‘Aerogel’ insulation with another layer of ‘Kilmat’ on top of that against the transmission tunnel from inside of car. Spring projects getting bigger