What size belt is needed to bypass ac on a GM 2500?

To bypass the AC compressor on a GM 2500, you'll typically need a serpentine belt that is 1-2 inches shorter than the standard belt used for the AC system. The specific size can vary depending on the engine type and model year, so it's best to consult the vehicle's service manual or a parts store for the exact belt length. Generally, a belt size around 96-98 inches is common for many GM 2500 models, but double-checking is advised.