The BSM sensors are installed in the tail lights when equipped. There are two variations of the led tail lights- those equipped with BSM sensors, and those not equipped with BSM sensors. When you get a level A or B package as opposed to a level 1 or 2 package, that just means the BSM feature is deleted due to the chip shortage (ie, saving the feature for only certain higher trim levels), and the truck will come with led tail lights that do not have the sensors. The chips in question are used to build the BSM sensors. As far as I know, you can still buy the actual sensors (or tail lights with the sensors) from any mopar parts supplier, albeit at a higher cost than they were a year ago. Then you can just add the feature to the truck yourself.