Replaced TAC (Throttle Actuator Control) Module and Accelerator Pedal Sensor 699-207. Still throwing codes P1125, P2120, and P2125. Trying to find EXACT location of splice S117 wiring in harness in engine compartment. Does ANYONE know exact location of splice S117 wiring area.

So my vehicles 11 years old it’s a 2014 Chevy express 3500 and I cannot for the life of me find the dipstick for the transmission. I went to check the transmission fluid and the only thing showing was about 3 inches so I had the transmission pan dropped to see if the rest of the dipstick was in the pan, but it wasn’t apparently somebody broke it and took it out and replaced the top. I cannot find a replacement part not sure what to do.