I have an older mpvi pro and just got an mpvi4 with a kit for my truck. Are these old units worth anything still or is it better to send it in and have them transfer all the credits/licenses to the new mpvi 4 device?
Just picked up a 2019 gmc denali and saw all the posts about the MAP sensors getting pretty nasty so I pulled mine this mooring and you guys weren't kidding. About the build up, I thought it was running smooth but its a huge improvement at idle and my drive into work got +2 to 3 mpg on the dash compared to what it averaged last week.