5 weeks of ownership and problems start

[xRide]

So I was back tracking what had happened the day when all my problems started. I read on here that these issues could simply be a brake light bulb.....and low and behold I had changed both brake light bulb that dat. So I went out side, put the old bulb back in (i was not having any issue prior to changing bulb) disconnect the battery for about 30 minutes. I reconnect the battery and the SUSP SELFLEVEL INACT light went out. Because this light went out, I took the ride for a spin with the 4X4, BRAKE, DSC? lights on. Went to park the car, shut it down and decided to put it back on. Once back on, I noticed that all the lights went out. So I decided to take it for a spin again. This time I set up the OBC to monitor the volts. While in motion, the volts never went below 13.5V. It was pretty much constant between 13.7 and 13.9v. This was all with all the warning lights off and AC running with interior lights on and music blasting. What I did notice however was that when I come to a stop at a light, it would drop down to high 12s briefly..and this was consistent. I drove around for about 30 minutes until all the lights came back on, including the TRANS FAILSAFE PROG.

At one point when the the lights were on minus the susp selflevel inact and trans failsafe prog, the voltage went up to 14.4.

Once the TRANS FAILSAFE PROG light comes on, thats when my radio cuts out, nav screen goes in and out and transmission jumps into high gear and the steering wheel is hard to turn as if its not getting any boost.

I've had the battery and alternator checked by autozone and they say its fine. I've also monitor the volts and they seem to be fine based on what the readings should be.

P.S. I also wanted to add that my brake/tail light comes on for me to check. It came on before the issues im having, i changed the bulb and im getting the message again.