I had an 04 CTS-V a couple years back. Car is very heavy, but rides smooth. I had the GM 100,000 mile warranty so any issue I had I took it back to cadillac and them fix shit. I never launched the car hard enough to mess anything up but allot guys that race them on LS1tech had issues with the 04-05 rearends. I would suggest an 06-07 as it came with the revised rearend and the 6L LS2.