Do you need DuramaxTuner.com Switch-On-The-Fly
(SOTF) Custom Tuning?
SPADE / EFI Live Autocal v3 Required
Recommended Transmission Tuning
Why do you need TCM Tuning?
TCM Tuning is especially important for trucks
Towing & Performance
This product can expose you to chemicals that are known to the State of
California to cause cancer. For more information, visit www.P65warnings.ca.gov