Medium Duty "Off Road" Tuning

** IMMO relearn is required via GM TIS2 with a GM MDI or Mongoose cable in order for the VATS system to work. 2 seperate files will be sent to be used for the IMMO being reprogrammed, and one without it having to be reprogrammed. Transmission tuning is...

Tune Profile Explanations: 4 Week limited support pack:This gives you access to all our single tune profiles. These profiles are a 4-week limited support. This give you 4 weeks to decide on a single tune profile to choose from. After 4 weeks your auto...