How Many Generations of Chevrolet Silverado 2500HD Are There?

Over the time period from 2001 to 2023, 4 generations of Chevrolet Silverado 2500HD were produced.

In the chart below, you can find in what period different generations of Chevrolet Silverado 2500HD were produced, what engines were installed on them, and what are the main differences between the cars of different years.