Speedometer output question on a6.2L 6L80E ?

[Hart_Rod]

Originally Posted by Street Smart

I installed a Dakota Digital VHX Series dash made for the truck and used their bus/cans interface. I absolutely love it! You can pull up all kinds of info on the dash just like a scanner. It shows 1/4 mile times that are dead-on (mph and e.t.) Sorry I didn`t install one sooner.
Happy holidays!

Yea it's a great setup and what I put in my 68. The Bim/CanBus work perfectly, however, I'm trying to get the speedo to work when I have the BIM unplugged for data logging (the scanner won't work with it plugged in). I got the tach to work with some changes in the tune, but I can't get the the ECM (pin 57) to put out a signal so that the speedo will work. I'm sure it's something in the tune, but I haven't been able to figure it out yet....