Goooood mornin...Alright, been at it for months and I'm pulling my hair out at this point. I've checked every forum/yt video... Scanned using obd2 blutooth scanner/Mellinium 90 pro, both produce codes...only two codes present at ecm/tcm (U0121 FAILED TO COMMUNICATE WITH ABS MODULE/P0449 EVAP VENT SOLENOID CIRCUIT)

let's look at things replaced, shall we: Transmission, ABS Module, Evap purge solenoid(fwd intake), Evap fuel vent solenoid(rear tank vent) all evap lines, wheel speed sensors, brake switch, all body wire harnesses, grounds cleaned in common fail points, battery terminals cleaned and coated l, alternator connections cleaned, ALL fuse set contacts filed clean just in case.

Symptoms occurring at this point to narrow down the playing field: ABS light, Stabilitrak off, Traction control off, repetitive "Service 4wd" message occurring, "P" flickering while sitting at idle in park, occasionally locks cycle while moving (similar to a motion lock), speedometer occasionally loosing signal and dropping from actual indicated speed and returning, occasional tcc communication fault, rough idle, 1st-2nd rumble shift rarely.

Ideas, theories, burn it and collect the insurance?