general problems of the 2015 GMC Yukon

My GMC youkon denali has brake lights that are known to dealers to fail. Yet there is not a recall. I looked on the inter net and saw that there has been this problem since 2015 to 2018. Because of a joint that was soldered instead of a wire. I know why when I brought it in for recall that the service man looked at my stop lights.

The Yukon's automatic transmission can get very jerky when accelerating from a stop, especially when the engine is cold (first 10-15 mins of driving). City driving seems to be the main environment when the transmission jerkiness occurs. The jerkiness started subtly around 75,000 miles, and now at almost 100k miles, the issue has only gotten more severe. Accelerating from a stop uphill and around turns are times when it's more prone to jerk. The best way I can describe it would be a lag in gear shifting caused by some type of delay the car's electronic control system. The lag has occurred so violently at times, it feels like I've been in a rear-end collision. I would hesitate to allow babies to ride in this car due to their inability to brace when these jerks occur; there's definitely enough force to cause whiplash to a baby. I would say the jerk happens 2-3 times every trip, even if I slowly accelerate to prevent quick gear shifts from happening.

While in motion my vehicle shuts completely off. This is in the middle of traffic at times. It displays warnings that stabilitrack has been disabled and shuits down everything electrical. At some points it doesnt shut completely down, but instead hesitates and then picks back up. This happens in various situations whether it be on the highway, turning, or driving city roads.

Problem started when driving at 60-70 mph you can feel a strong vibration cauaes entire truck to shake dont know what it is dealers cant fix also transmisi�n shifts into gears hard accelerates by itself causes rough driving very loud noise under truck soumds like transmisi�n about to come off and also shifts into 4wd by itself or park to nuetral and truck wont run.

Transmisi�n problems we where driving around the city at at 30-40mph when the gears went crazy it accelerated by itself rpms went crazy it sounded like the transmisi�n had gears in pan loud grinding then also the seats dont vibrate with land departure it shows service lane departure last when drivi g at speeds lf 40-70 mph there is a strong vibration in front makes entire truck shake took to dealer rotated tires and balanced allignment also and problem still there idk what to do.