Richard,
I have an 08 CC Sierra as well, but an SLT that currently has the leather with power, heat, and memory, but no cooling. I'm definitely interested in the heat/cooling mod for the front seats, but I'm also curious if it's possible on the Crew truck to upgrade the rear seat to have heat/cooling as well? That's one thing I'd really like to have for the benefit of rear seat passengers in my truck as well. Thoughts?
Thanks!
Also, I just looked at an '09 Escalade Platinum Edition truck at the auto show in Detroit, and I see they brought back the heated/cooled cup holders... I'm also going to be looking into doing that mod and installing them into my All-Terrain's console. Once I have that figured out I'll document it for everyone also.