Are there two diff mail trucks

You're referring to the iconic mail trucks!

Yes, there are two main types of mail trucks used by the United States Postal Service (USPS):

1. Grumman LLV (Long Life Vehicle): This is the most common type of mail truck, also known as the "Grumman" or "Kangaroo" due to its distinctive design. The LLV was introduced in the 1980s and has been the workhorse of the USPS fleet ever since. It's a reliable and durable vehicle that can carry up to 20,000 pounds of mail and packages.
2. Next Generation Delivery Vehicle (NGDV): In 2020, the USPS introduced the NGDV, a new generation of mail trucks designed to be more efficient, environmentally friendly, and technologically advanced. The NGDV is a more modern and sleek design, with features like improved fuel efficiency, advanced safety features, and increased cargo capacity. The NGDV is being phased in to replace the older LLV fleet over the next several years.

Both types of mail trucks are designed to serve the same purpose: to deliver mail and packages to customers across the United States. However, the NGDV is designed to be more efficient and better suited for the changing needs of the USPS and its customers.