This fits the 4L60E trans and is a 2 wire hookup at the ECM. You have a 3 way switch that lets you select 2 diffrent levels of shifting performance plus off which is stock. I had this on my 1994 K2500 years ago and just found it yesterday. I still have the instructions with it. I think I paid around $50 for it years ago so if they are still made i'm sure they are cheaper now?
How bout $30.00 and i'll eat the shipping.
How bout $30.00 and i'll eat the shipping.