2023 Cadillac Escalade Driver Assist & ADAS Problems

when i took delivery of my vehicle in November of 2022 my rear parking and pedestrian guide lines worked perfectly and a month later they stopped working and is no longer active. Given the huge size of the Cadillac escalade this is major safety issue and could result in a rear collision or a pedestrian being injured. I contacted Cadillac and there is no fix for this and when i start my vehicle a blue hourglass appears on my center info screen

Vehicle: 2023 Cadillac Escalade purchased in Oct 2022. At the time of new vehicle delivery the Dealer in Atlanta Peachtree Blvd, informs the Reverse Camera is not working completely - Has issues - 1.) Missing Gridlines 2.) Blue Hour Glass reducing the visibility while reversing the vehicle. Dealer states this is GM Cadillac issue and they cannot solve it. 3.) There is an irritating vibration sound while driving this 2023 Escalade above 70 mph ( like a flag on top of vehicle). The dealer in Atlanta, Peachtree Blvd cannot fix the problem even after 4 service center visits, and keeping the vehicle for more than 10 days . It is now almost 8 months since the new 2023 Escalade was purchased. Called up GM Cadillac Customer Support many times on 800 333 4223 since one month and registered the complaint case and even GM Cadillac does not know and does not have a clue on how to provide any solution. The customer support provided by GM Cadillac Customer support team is pathetic. No response to customer complaints !!!!! The GM Cadillac Customer Support team is not qualified to deal with customer issues / pain. It is pathetic to have companies like GM Cadillac to ignore problems with their premium vehicle like Escalade. I do not see any other solution, hence reporting the issue with NHTSA. Manufacturers like GM Cadillac should not sell vehicles with known issues, without informing customers.