[caddyshack33]

My 04 MT CTS only has a rev limiter just over the redline -- I rarely hit it. I had a DTS out for a spin and I noticed its rev limiter is around 4500RPMS or so. I think it's only on automatics.

Yeah, CARFAX is not very reliable, in my experience. I've checked VINS that I KNOW were in reported car accidents and nothing came up on CARFAX. I just don't think its very thorough. The GM VIS will give you the real repairs on the car. Look that over carefully as it could be a harbinger of things to come.