azbirdhunter88 Report post Posted March 27, 2019 I have a Smarty SO3 tuner for a 98.5-02 Cummins if someone is interested. This is a great tuner for these trucks. It will clear and diagnose codes for you. Has 9 power levels. Brand new in box. $500 623-866-3972 Share this post Link to post Share on other sites
Hoss50 Report post Posted March 27, 2019 If you are looking for a tuner for those trucks this is a great option. I had this same tuner on my old 98.5 CTD and it really helped that motor bring some extra power that was good useable power. Share this post Link to post Share on other sites
azbirdhunter88 Report post Posted March 28, 2019 Ya this smarty is safe and offers good power. Share this post Link to post Share on other sites
