I have performed a 0411 PCM swap into a 1999 Quigley 4x4 van. PCM was from a 2001 Express van, with 350 Vortec and 4L80E. Operating system 1283002. HP tuners is a great tool and I've got it running pretty well.
I cannot seem to get it to shift out of 1st gear when in 4x4 Low Range. I am providing a ground signal to Pin C2-16 when in 4 low only, and a +12V signal to C2-19 when in 4x4 High or Low. VSS is located at output of tranfer case (factory style), not on the transmission. The 4x4 Low shift tables (14998 speed, and 14999 RPM shift tables) are showing in my editor, and I have them edited to reasonable values, but they do not seem to be taking effect when shifted to 4 Low. Please see attached HPT file. I am using version 3.2.127 VCM editor.
I have verified tha.t the signals are being supplied to the PCM, but does anyone know how to monitor these 2 pins with the scanner to see if the signal is being "seen" by the PCM?
Any input would be appreciated.
John