What size battery on a Chevy 2500 van?

The Chevy 2500 van typically uses a Group 78 or Group 31 battery, depending on the specific model and options. The recommended battery capacity is usually around 800 to 1000 cold cranking amps (CCA) for optimal performance. It's important to check the owner's manual or consult a dealership for the exact specifications for your particular model year.