CTT Tuning has specifically made these tunes for your 6.6L Duramax. If you are wanting more efficient, more reliable, and cleaner tunes for your Duramax, CTT Tuning combined with your existing EZ-Lynk Auto Agent is the perfect match. With CTT Tuning you will be able to choose from a great selection of tunes such as Optimized Stock, Tow, Street, Race, and Max Effort. They also offer Transmission (TCM) Tuning which changes the shifting points and line pressure, helping to keep your transmission run smooth! So whether you are looking for a mildly increased stock performance tune, want to gain towing efficiency, or just go after some power gains, CTT has it all!

2011-2016 Duramax CCT:

• 30 HP – Optimized Stock
• 60 HP – Tow
• 100 HP – Street
• 150 HP – Race
• 200 HP – Maxx Effort (lift pump recommended)

TCM Tuning:

• Optimized shifting points & line pressure in your Allison Trans
• Must have CTT Engine tuning 

Limited Support Package: The Limited Pack gives you all applicable CTT Tunes for your truck for 4 weeks. After the 4 week period, you'll be left with whatever package you had installed at the time of expiry and won't receive any updates, revisions, or changes to those tunes. 

Unlimited Support Package: The Unlimited gives you all CTT Tunes for life. If they produce new tunes, updates, revisions or changes to the Duramax tuning you'll be able to download them and flash your truck at any time in the future.

Every support package includes unlimited data logging and chat features so that you can reach a CTT tuner from anywhere, at any time.