With any modification comes an element of risk for reliability. Since you returned it to the stock tune, I doubt it's the Diablo tune that is the issue. If you cannot be without your car at any point for any reason, it is probably wise to refrain from modifications in general. Especially if you are ...

Terrific. I look forward to learning the unit.

Thanks for supporting the CTS-V. I am considering buying a Trinity. I currently have a CAI installed, and have a 2.55 upper pulley waiting to be installed. Will the 91 octane tune be safe for this application? Also, the car is an automatic. I understand it will tune the TCM as well. Does it leave ...

Thanks for supporting the CTS-V. I am considering buying a Trinity. I currently have a CAI installed, and have a 2.55 upper pulley waiting to be installed. Will the 91 octane tune be safe for this application? Also, the car is an automatic. I understand it will tune the TCM as well. Does it leave ...