Thanks for the welcome. I'm just looking to firm up the shifts, this seemed like a cost effective way to do it. Truck has enough power for me but have considered the KOJO tune for trans & a bit more umph. I was going to look and see if the two wires the B&M taps into are on my ecm, as fastjohnny...
B&M 70380 - B&M ShiftPlus Electronic Shift Improver Kits
"Diesel Shift Enhancer for all 93-98 6.5TD's in any truck using the GM 4L80E electronic overdrive transmission"
Anyone know if this would work in a 1999 Chev. K3500 w/4L80E 4x4?