I am a the new owner of a 07 GMC with 91k on the clock. I signed up on another site (Chevy and GMC Duramax forum) and have been searching until my head started spinning. I will start doing some searching on here when my head clears. To many choices not enough knowledge to know what is good or not. I have more than enough power for what I need so I will be looking to improve MPG and keeping it running for a very long time. seems like a great site and cant wait to looking at it a lot more.