2024 Chevrolet Silverado 2500HD Battery Size & Group

Quick answer

The 2024 Chevrolet Silverado 2500HD, depending on its engine, will use a specific battery configuration:

• 6.6L V8 Gas Engine:

  • BCI Group Size: Group 48 / H6
  • CCA Rating: 760 CCA or higher
  • Reserve Capacity: 120-140 minutes
  • AGM vs. Flooded: Can use either, but AGM is generally recommended for durability and performance in modern vehicles.
  • Terminal Layout: Top post
  • Physical Dimensions: Approximately 11.0" L x 6.9" W x 7.5" H
  • Dual-Battery Setup: Not applicable for the gas engine.

• 6.6L Duramax V8 Diesel Engine:

  • BCI Group Size: Group 31 (Often referred to as 31S for top post configuration)
  • CCA Rating: 900-1000 CCA per battery (for a total of 1800-2000 CCA)
  • Reserve Capacity: 170-200 minutes per battery
  • AGM vs. Flooded: Can use either, but AGM is highly recommended for the demands of a diesel engine, especially in cold weather.
  • Terminal Layout: Top post (often with stud terminals)
  • Physical Dimensions: Approximately 13.0" L x 6.8" W x 9.4" H per battery
  • Dual-Battery Setup: Yes, requires two batteries wired in parallel to meet the high cranking demands of the diesel engine.

Replacement battery options

When replacing your battery, always verify the group size and CCA (or marine cranking amps equivalent for some Group 31 batteries) for your specific engine.

• For 6.6L V8 Gas Engine (Group 48 / H6):

  • Interstate: MTP-H6/48 (Flooded), MTX-48/H6 (AGM)
  • DieHard: Platinum AGM Group 48
  • Odyssey: ODP-AGM48 H6 (Extreme Series)
  • ACDelco: 48AGMHR (AGM), 48HR (Flooded)

• For 6.6L Duramax V8 Diesel Engine (Group 31):

  • Interstate: 31-MHD (Flooded, often used for marine/heavy-duty), SRM-31 (Marine AGM, excellent for diesel applications when dual batteries are used).
  • Optima: Optima YellowTop D31A (AGM, deep cycle/starting)
  • Odyssey: ODP-AGM31 (Extreme Series AGM)
  • AGM Group 31 batteries are highly recommended for diesel applications due to their superior cold-cranking performance and vibration resistance. Note that specific part numbers for Group 31 batteries can vary significantly by brand and whether they are marketed for automotive, marine, or heavy-duty use. Always ensure the CCA and physical dimensions match.

AGM vs. flooded — which does this vehicle need?

Both the gas and diesel versions of the 2024 Chevrolet Silverado 2500HD can technically use either AGM (Absorbent Glass Mat) or traditional flooded lead-acid batteries. However, there are significant advantages to choosing an AGM battery, especially for a heavy-duty truck.

• AGM Batteries: Offer superior vibration resistance, a slower self-discharge rate, better performance in extreme temperatures (especially cold), and a longer lifespan. They are also spill-proof and maintenance-free. For the demanding electrical systems and high starting loads of the Silverado 2500HD, particularly the Duramax diesel, AGM batteries are the recommended choice for optimal performance and longevity.
• Flooded Batteries: Are generally less expensive upfront. While suitable for many applications, they are more susceptible to vibration damage, require occasional fluid level checks (if not a