Rancho 9000's are a decent ajustable shock for the money, Thats what I run :thumb: QA1's are better but also twice the $$,,, Also there are a bunch of people running Bilstein on there duramax's with mixed reviews...
Bilstein 5100's best shock I have ever run. I have brocken the ends off of 2 different Rancho 9000's from suspension going to full droop in the feild. The Rancho's were nice but were no good for what I do with my truck
what are you using the truck for ? what wheels and tires and driving style ? for a soft "squishy" ride the Bilstines are decent , too soft for my liking , for adjustable towing / race / off road/ anything I would go with the Rancho 9000's , For racing / sport street driving or if you just like a very controlled ride then QA1's are the ticket for sure .