Change switch in rear diff can't get pump out because I can't get the hub off the driveshaft on nut need help

It starts up but will not stay started or let me put the car in any gear without turnjng off..

What exactly is needed to be done to change transmission fluids and does anything need to be replaced

What does bank 1 and 2 system too lean do and why

torque management request input signal (a) ⬅ i need to know what that really means?

I have changed the bulbs and checked the fuses. Water got into my tail light cover. I have changed the bulb. Could it be the harness needing to be replaced

I noticed my right tail light went out but my brake lights still work. Can you help please

What is it that made all these gauges quit working and how do I fix it

Filled up car last night it had 400 miles I started it and it ran for 15 mins the gas tank was at a half tank and 192 with the check engine light and a sensor that said fuel guage op 1/2 - E only, drove 30 miles turned car off and started it again and the tank went back to full with 399 miles

still dont work what the problem ?

I have to lift up on the brake pedal with my foot to make them go off. Otherwise it looks like I have my for on the brakes when I don't.