Thank you very much! I have been doing the same by trying different tire pressures.
So, the vin tag (mfr date - Jan 2010) on my C5 with Avon roadriders that says 24 front and 32 rear is incorrect?
I wouldn't say it is incorrect. To date, I've been running with the pressures listed on the frame because that's how I got it from the dealer, and it hasn't been a problem. It's just, so it seems, not all it could be.
I believe I'll be trying the lower pressures listed in the owner's manual starting tomorrow.