I have a 94 c1500 auto 5.7 with the 4l60e transmission, I think the bcc bin code is BJLJ. The problem I have is I can't fine the stock bin for it so I tried using a similar one to it which is the BJLH, but it won't shift gears and the check engine light is on, but can't read them with my snap-on scan tool. I can use my stock chip and everything works, but I want to tune my truck since I rebuilt it with flat pistons, a rv cam, and a 454 tbi with holly intake. I'm using Tunerpro rt with burn 2. This is my first time tuning.