I have a like new edge evolution programmer for the 07-08 1500's with 4.8,5.3,or 6.0 engines. It was installed on my truck for about 2500 miles. And i had no problems i absolutely love this programmer, but some things have come up and i could use the money for other things. It makes a very noticeable difference, especially in the transmission programming. If you have any questions please feel free to email or pm me. I am asking 275obo for the programmer concidering i paid 300.20 for it and that was at dealer cost! Let me know with any questions.