How goes it? I have my 2003 LB7 that has an issue with the speedometer either reading normal speeds or reading triple the speed intermittently. I've replaced the speed sensor on the transfer case and had my instrument cluster rebuilt by ISS Automotive. Neither one of them has fixed the issue and I've used a speed sensor out of another truck that I know works and still nothing! I've plugged my code reader in and confirmed that the speed sensor is reading correctly and all the other sensors on the transmission are reading correctly. I'm not sure if it's something in the ECM, TCM, or ABS module looking at some wiring diagrams or if its a bad ground or what. It does have EFI Live on it, but didn't have this issue until recently and has ran perfectly fine for the years I've had it. Really scratching my head on this one!
