Software problems of the 2015 GMC Yukon

I purchased by vehicle in the summer of 2015. It has been in the shop numerous times for various issues, mostly electrical involving the computer and software, or issues involving my tires or steering when turning the steering wheel. . My "driver assist" has malfunctioned many times and I have taken it to the shop to have it repaired on 3 separate occasions. Last summer my front and rear lights started flickering and stopped working. I spent $800 for the back passenger brake light and almost $1000 for the front driver head light assembly. I also had to get a new battery for this vehicle. My 2015 GMC Yukon xl is now malfunctioning again and this time, I am told that the seat motor (that alerts you when you are near an obstacle has burned out. ) about 4 days ago, I became aware of ticking noise while my car has been idle. I immediately scheduled a maintenance appointment. Today, I am also informed that my "lifters" are bad on the vehicle and my engine is going bad. I am told the air conditioning condenser has burned out, I am told the motor under my seat is burned out. I have performed routine maintenance, I get oil changes regularly and use high quality synthetic oils. I take my car to the shop at least 2x per year for problems and some major repair is always required. This is a car that I am going into the 5th year of ownership this summer. Originally. I was told that there was a recall for brakes, now I am told there is not, but I have taken my car in for various recalls at least 3x. This is an unsafe, defective vehicle. Every system fails. I am now in search of a new vehicle. I have driven other gm vehicles (grand am, hummer) and none have required so much repair costs. Today I am told that it will cost $6800 to repair my vehicle to make it safe. My repair records will show the repairs and service charges I have paid since purchase. This is a lemon.

I have a brand new 2015 Yukon denali (short wheel base) with less than a thousand miles and a "service 4wd" message that has appeared twice rendering the car extremely unsafe and un-drivable for a long distance and having to have it towed to the dealer twice. A software update was done on the car the first time, only resolved the issue for a few weeks, the issue re-occurred after 3 weeks. When turning the vehicle on the dash gives the message "service 4wd". The car has a transmission button to change from 2wd, auto, 4 high and 4 low. I do not touch this button, I just leave the car in auto and drive. I do not tow anything, this is just a family car used for commuting. When the "service 4wd' message appears, the car is barely drivable. When it is put in reverse, the car just brakes after a few feet, as if the parking brake were on, but it obvious is not engaged. When turning left or right, the car brakes mid-turn and will only complete the turn if 3/4 to full accelerator is applied to continue through the turn. The car slightly bucks through the turn and the engine sounds different and has little power going around corners and going up hills. The car cannot safely be driven in a straight line faster than 40-50 mph. I telephoned onstar and diagnostics were run during both occurrences with the same error message from onstar diagnostics: "the braking system has an issue- transfer case module not working as expected". When will gm issue a recall on this safety issue, I do not feel safe letting my wife and child in the car if it brakes by itself, loses power and cannot complete turns. I purchased this car to have a safe/large vehicle for my family: service 4wd appears on screen it renders the car un-drivable and the transmission button becomes inoperable and selecting other transmission modes becomes not possible.