This is the million dollar question that know has a answer to? I've asked on the LS1 tech forum and on here, phone my GM dealer no ones ever tried there cruise on a manual trans car in, anything other then 6th gear??? I'm looking for owners real answers, not..well my buddies car is a 6speed pretty sure cruise works in 4th, 5th, 6th?? I want real solid answers!

I'm trying to get cruise to work in 4th, 5th, 6th but can only get to work in 3rd, 4th, or 3rd, 5th, 6th. Depending on how I mess with the speedo settings and raw hex values. I need to know if I'm chasing my own tail, maybe cruise is only supposed to work in 5th and 6th on a manual trans? Or just 6th?