What is the rear differential fluid capacity on a 2006 Chevy silverado 2500HD?

The rear differential fluid capacity for a 2006 Chevy Silverado 2500HD is approximately 7.5 pints (or about 3.75 quarts) for models equipped with the standard rear differential. If the vehicle has an optional locking rear differential, the capacity may be slightly higher, around 8.5 pints (or approximately 4.25 quarts). Always consult the owner’s manual or a qualified mechanic for the most accurate specifications.