Bought my blazer In September 2019 , it has been in the shop twice with electrical or camera problems. First time all my back up and side cameras went out. Took back to dealership GM said to replace all outside cameras because could not figure out problem. Now it.is back in shop with entertainment system completely black nothing works radio, navigation etc. Have.to have new radio installed with NO release.date from GM since it will have to be ordered. After reading comments on this page this seems to be a constant problem with these vehicles. GM needs to recall or keep parts in stock very disappointed!!