2025 Chevrolet Silverado 2500HD: Battery Size & Group
A complete guide to the battery BCI group size, CCA ratings, and replacement options for the 2025 Chevrolet Silverado 2500HD.
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Quick answer
- BCI Group Size: H7/94R (gas engine) or Group 31 (diesel engine)
- Cold Cranking Amps (CCA): 850 (gas) or 720 (diesel, each)
- Reserve Capacity (RC): ~140 minutes (gas) or ~155 minutes (diesel, each)
- AGM vs. Flooded: AGM required
- Terminal Layout: Right-hand positive
- 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: Yes, dual Group 31 batteries for diesel models.
Replacement battery options
- ACDelco (Original Equipment): Gold H7/94RAGM (gas), 48AGMHR (diesel)
- Interstate: MTX-94R/H7 (gas), 31-AGM (diesel)
- DieHard: Platinum AGM H7/94R (gas), 31-AGM (diesel)
- Odyssey: ODP-AGM94R/H7 (gas), ODP-AGM31 (diesel)
- Optima: YellowTop DH7 (gas)
AGM vs flooded — which does this vehicle need?
The 2025 Chevrolet Silverado 2500HD requires an Absorbent Glass Mat (AGM) battery for both the gas and diesel engines. The complex electronics, start-stop systems (if equipped), and high-draw accessories in modern trucks demand the stable power and vibration resistance that AGM batteries provide. A traditional flooded battery will not be able to handle the electrical load and will have a significantly shorter lifespan.
Post-installation relearn / reset procedure
After replacing the battery, you may need to perform a relearn procedure to ensure the truck's systems are functioning correctly. The most common reset is for the window auto-up/down feature. To do this, simply run each window all the way down, then all the way up, holding the switch for a few seconds in each direction. The vehicle's Battery Sensor Module should automatically detect the new battery and adjust the charging strategy, but it is recommended to let the truck idle or drive it for at least 10 minutes to allow the system to recalibrate.
Signs of a failing battery
- Slow engine crank
- Dimming headlights, especially at startup
- Warning lights on the dash, such as the battery light or check engine light
- Corrosion on the battery terminals
- A battery that is more than 3-5 years old
Common battery issues for this generation
As a newer model, the 2025 Silverado 2500HD has not yet shown widespread battery issues. However, common problems on late-model GM trucks include premature battery failure due to the high electrical demands of the vehicle, and issues with the battery sensor module not correctly reading the battery's state of charge. It is crucial to use a high-quality AGM battery and ensure all connections are clean and tight.
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More specs for the 2025 Chevrolet Silverado 2500HD
Oil Capacity & Filter
Capacity, weight, filter PN, drain plug torque, change interval.
Fluid Type Specs
Engine oil, coolant, ATF, diff, brake, PS, DEF — with OEM spec numbers.
Coolant Capacity & Type
Total system capacity, OEM coolant spec, flush interval, bleed tips.
Transmission Fluid & Service
Trans model, fluid spec, capacity, filter PN, service interval.
Torque Specifications
Lug nuts, drain plug, caliper, axle nut, plug, key fasteners.
Brake Pad & Rotor Specs
Pad PNs, rotor size, min thickness, caliper torque.
Tire Size & Pressure
OEM size, cold psi, bolt pattern, wheel size, TPMS.
A/C Refrigerant & Oil
R-134a or R-1234yf, charge oz, PAG oil spec.
Bulb Sizes (Headlight, Tail, Fog)
Headlight, fog, tail, turn, reverse, interior.
Factory Maintenance Schedule
Service intervals by mileage, severe-duty notes, known issues.
Towing Capacity & Payload
Max tow, payload, GVWR/GCWR, hitch class by trim.
Fuse Box Diagram & Amperage
Fuse box locations, layout, amps, and what each fuse controls.
Serpentine Belt Routing & Length
Belt routing, length, rib count, OEM + aftermarket PNs.
Wheel Alignment Specifications
Camber, caster, toe ranges (front & rear), adjustability notes.
Paint Color Codes
All factory colors with paint codes, sticker location, touch-up tips.
Wiper Blade Sizes
Driver/passenger/rear blade size, attachment, OEM + cross-refs.
Spark Plug Type & Gap
Plug PN, gap, torque, interval by engine.
Transmission & Axle Gear Ratios
Trans gear ratios, axle ratios, RPO codes, tow vs MPG impact.
Key Fob Programming
DIY programming steps, FCC ID, fob PN, battery, transponder.
Same spec — other model years
2014 Silverado 2500HD
2015 Silverado 2500HD
2016 Silverado 2500HD
2017 Silverado 2500HD
2018 Silverado 2500HD
2019 Silverado 2500HD
Maintenance & repair guides
2025 Chevrolet Silverado 2500HD Maintenance Schedule →
Available maintenance guidance; confirm the manufacturer schedule.
Repair planning references →
Plan the scope of work; detailed procedures need configuration-matched evidence.
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