On certain trucks, the backup lamps could be blocked and may not be visible. As a result, the trucks don't meet the requirements of the Canadian regulations.
Safety Risk
Backup lamps that aren't visible could cause a person not to recognize that the vehicle is backing and increase the risk of a crash.
Corrective Actions
Navistar will notify owners by mail and instruct you to take your truck to a dealership to install new tail stop/turn signal lamps with integrated backup lamps.
Get told about the next recall on your International.