hello how is everybody i know this is not good for the engine and no use of it but i want to know how to make both P12 ecm for 2007 I6 trailblazer and 2008 yukon xl 5.3 rev until 6000rpm in park and do the fast cutoff as cold ( popcorn ) like in the attached youtube video
https://www.youtube.com/watch?v=q_ystEXwoOs