Help!!!!Ls6 With 460l Auto Conversion Need Help
 

Hi Guys!
Happy Holidays! Need help for a friend of mine here in Tampa he has done a LSX Conversion in his 1952 Chevy 3100 Truck running a LS6 Motor w/ 460L Auto trans the computer is a GM (99-02) with Red and Blue connectors .....Its a Drive by wire and rear end GM 12 bolt
Having problems cant get it dialed in the trans speed sensor not communicating with computer any help?:headspin:
Thanks,
Bill

First step is verifying that the wires from VSS sensor have continuity, when traced back to their respective ECM pin-outs in harness. If that checks out, its a bad VSS sensor.

-OR- Heres the lazy / quick way

Pop another VSS sensor on there that is verified as good. Still having a problem? Then its the harness. Always a chance its a bad ECM but i very much doubt this