general23cmp

iTrader: (1)

I have the opportunity to buy a 2003 (and similar years) LS wiring harness. I was looking for a manual harness with a computer for a manual since I plan on using a non-computerized transmission in my conversion. I have heard that it is best to go with a manual transmission computer and harness for this setup to work easier. The problem is that the computer and harness I have found is for an automatic computerized transmission LS motor. The guy selling it stated that it isn't a big deal, that you just dont plug the automatic transmission wires in, and it will work. Is this true? I plan on reprogramming the PCM, so it being automatic isn't a huge deal, but I need the harness to work.

It's DBW and I believe these years had a seperate computer for an auto trans, but am unsure.

It's a good deal, or I would simply wait.

Help.

aknovaman

iTrader: (7)

VSS connector is different. Need to delete skip shift in PCM file. Leave trans unplugged (dud) and load a manual trans file and you are good to go. Delete all trans codes and set up speedo settings for M6 trans. Piece of cake for any tuner. Reverse light and skip shift is simple.

general23cmp

iTrader: (1)

Would I even have to worry about the vss since my transmission won't have that connection anyway?

aknovaman

iTrader: (7)

Only if you want to have a speedo when using a electronic trans. It's NA for TH350, Th400 or pwr glide. VSS sends signal to PCM then outputs correct ratio aplicable to gears and tire size when driving an electronic dash speedo.