2023 Chevrolet Silverado 2500HD: Battery Size & Specs

Quick answer

• BCI Group Size: H7/94R (gas engine) or Group 31 (diesel engine)
• Cold Cranking Amps (CCA): 850 CCA (gas) or 720 CCA (per battery, diesel)
• Reserve Capacity (RC): ~140 minutes (gas) or ~150 minutes (per battery, diesel)
• AGM vs. Flooded: AGM is required for both gas and diesel models.
• Terminal Layout: Top-post, positive terminal on the right (standard)
• Physical Dimensions (approximate):
  • H7/94R: 12.4" L x 6.9" W x 7.5" H
  • Group 31: 13" L x 6.8" W x 9.4" H
• Dual-Battery Setup: The diesel engine model comes with a dual-battery setup, requiring two Group 31 batteries.

Replacement battery options

• Interstate: MTX-94R/H7 (AGM)
• Optima: DH7 YELLOWTOP (AGM)
• DieHard: Platinum AGM H7/94R
• Odyssey: Performance Series ODP-AGM94R H7 L4
• ACDelco: 94RAGM (Gold)

AGM vs flooded — which does this vehicle need?

The 2023 Chevrolet Silverado 2500HD requires an Absorbent Glass Mat (AGM) battery for both the gas and diesel engine options. This is due to the increased electrical demands of modern vehicles, including start-stop systems, advanced infotainment, and numerous onboard computers. AGM batteries offer superior performance, durability, and vibration resistance compared to traditional flooded batteries, making them essential for maintaining the reliability of your Silverado.

Post-installation relearn / reset procedure

After replacing the battery in your Silverado 2500HD, a relearn procedure is recommended to ensure all systems function correctly. The most critical is the Battery Sensor Module relearn. While some systems may relearn on their own after a short drive, it's best to use a scan tool to perform the "Battery Sensor Module Learn" procedure. This will reset the battery monitoring system and ensure proper charging. You may also need to reset the clock and radio presets.

Signs of a failing battery

• Slow engine crank: The engine turns over sluggishly, especially in cold weather.
• Dimming lights: Headlights and interior lights may dim when you start the engine or use accessories.
• Warning lights: A battery or check engine light may illuminate on the dashboard.
• Swollen battery case: The battery case appears bloated or deformed, indicating internal damage.
• Corrosion on terminals: A white, powdery substance around the battery terminals can indicate a leak.

Common battery issues for this generation

This generation of Silverado trucks has a sophisticated electrical system that can be sensitive to battery health. The most common issue is premature battery failure due to the high electrical load from accessories and onboard computers. Another potential problem is a "parasitic draw," where an electrical component continues to draw power after the truck is turned off, draining the battery. If you experience repeated battery failures, a parasitic draw test should be performed.

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