Final answer:
The bumper stickers on the side of the Rat Trap Delivery Truck say "Shooting Yankees" and "Dead Yankees Tell No Tales," indicating a negative attitude towards people from the North and reflecting historical tensions between the North and South during the Civil War and its aftermath.
Step-by-step explanation:
The bumper stickers on the side of the Rat Trap Delivery Truck read "Shooting Yankees" and "Dead Yankees Tell No Tales." These bumper stickers indicate the lingering antipathy of Southerners for centralized government. The phrases suggest a negative attitude towards people from the northern part of the United States and a desire to harm or get rid of them. This reflects historical tensions and cultural differences between the North and South during the Civil War and its aftermath.