Codes 1860 _758_753.? 97 sonoma 4x4 vin x 4.3

Hello, The computer is smart. It will give itself several chances to pass its own self test before failing itself, so it is probably best to set test the operation of the sensors instead of waiting for the self test to complete. The EVAP problem: what is going on there? The codes you have set are all electronic transmission control issues, so check the main harness to the transmission to see if there is a transmission fluid leak into the electrical connector. If not, and if this is a 4L60E, it is worth removing the transmission oil pan to replace the fluid and filter, but most importantly, to test the solenoids. All of them.