2015 Chevrolet Silverado 3500HD Battery Size & Group
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Quick answer
- BCI Group Size: Group 31 (Diesel); Group 48/H6 (Gasoline)
- CCA Rating (Diesel): 900-1000 CCA per battery (dual battery setup)
- CCA Rating (Gasoline): 730-800 CCA
- Reserve Capacity (Diesel): 170-200 minutes per battery
- Reserve Capacity (Gasoline): 120-140 minutes
- AGM vs. Flooded: Primarily flooded from the factory, but AGM is an excellent upgrade for both diesel and gasoline.
- Terminal Layout: Top post (SAE terminals)
- Physical Dimensions (Group 31): Approximately 13" L x 6.81" W x 9.44" H
- Physical Dimensions (Group 48/H6): Approximately 11.3" L x 6.9" W x 7.5" H
- Dual-Battery Setup: Yes, diesel models come with a dual-battery setup.
Replacement battery options
Here are some popular replacement battery options for your 2015 Chevrolet Silverado 3500HD. Always double-check fitment with your specific vehicle and engine.
Diesel (Group 31)
- Interstate: MTZ-31 (AGM), MTP-31S (Flooded)
- Odyssey: 31-PC2150S (AGM)
- DieHard: Platinum Group 31 (AGM)
Gasoline (Group 48/H6)
- Interstate: MTZ-48/H6 (AGM), MTP-48/H6 (Flooded)
- Optima: H6 YELLOWTOP (AGM)
- DieHard: Platinum H6 (AGM)
- ACDelco: 48AGM or 48PGS (AGM), 48HPG or 48PGF (Flooded)
AGM vs. flooded — which does this vehicle need?
The 2015 Chevrolet Silverado 3500HD typically came from the factory with flooded lead-acid batteries, regardless of engine type. However, for both diesel and gasoline models, an Absorbed Glass Mat (AGM) battery is an excellent upgrade. AGM batteries offer several advantages:
- Durability: More resistant to vibration, which is beneficial for heavy-duty trucks.
- Longevity: Generally last longer than flooded batteries.
- Performance: Better cold-weather performance and a higher discharge rate.
- Maintenance-Free: Completely sealed, so no need to check water levels.
- Safety: Less prone to leaking acid or off-gassing, making them safer in certain situations.
While a flooded battery will certainly work and meet the factory specifications, an AGM battery often provides a superior ownership experience and can be a worthwhile investment, especially for diesel trucks which demand more from their batteries.
Post-installation relearn / reset procedure
After replacing the battery in your 2015 Chevrolet Silverado 3500HD, it's important to understand that the vehicle
More specs for the 2015 Chevrolet Silverado 3500HD
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 3500HD
2016 Silverado 3500HD
2017 Silverado 3500HD
2018 Silverado 3500HD
2019 Silverado 3500HD
2020 Silverado 3500HD
Maintenance & repair guides
2015 Chevrolet Silverado 3500HD 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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