2016 Chevrolet Silverado 2500HD Battery Size & Group

Quick answer

• BCI Group Size: Group 48 (Gasoline), Group 31 (Diesel)
• CCA Rating (minimum): 720 CCA (Gasoline), 800 CCA per battery (Diesel)
• Reserve Capacity (minimum): 110 minutes (Gasoline), 160 minutes per battery (Diesel)
• AGM vs. Flooded: Both gasoline and diesel models can use either AGM or flooded batteries. AGM is recommended for its durability and better performance.
• Terminal Layout: Top post (SAE terminals)
• Physical Dimensions:
  • Group 48 (Gasoline): Approximately 10.9" L x 6.9" W x 6.9" H
  • Group 31 (Diesel): Approximately 13" L x 6.8" W x 9.4" H
• Dual-Battery Setup: Yes, diesel models use a dual-battery setup.

Replacement battery options

For Gasoline Models (Group 48)

• Interstate: MTP-H6 (Flooded), MTX-48/H6 (AGM)
• Optima: Optima RedTop 34/78 (adapter may be needed for H6 fitment, check dimensions), Optima YellowTop DH6 (AGM)
• DieHard: Platinum AGM Group 48
• Odyssey: ODP-AGM48 H6 L3 (AGM)
• ACDelco: 48AGM (AGM)

For Diesel Models (Group 31 - Requires Two Batteries)

• Interstate: MTZ-31P (AGM), 31P-MHD (Flooded)
• Optima: Optima YellowTop DH6 (adapter may be needed for Group 31 fitment, check dimensions, and verify fitment for dual battery setup)
• DieHard: Platinum AGM Group 31
• Odyssey: 31-PC2150 (AGM)
• ACDelco: 31AGM (AGM)

Note: Always verify part numbers and fitment with your retailer before purchase.

AGM vs. flooded — which does this vehicle need?

The 2016 Chevrolet Silverado 2500HD, whether equipped with the gasoline or Duramax diesel engine, can utilize either a traditional flooded lead-acid battery or an Absorbent Glass Mat (AGM) battery. However, for most owners, an AGM battery is the recommended upgrade.

Flooded batteries are the more economical choice and have been the standard for decades. They perform well in normal conditions. The downside is that they can require occasional maintenance (checking and topping off electrolyte levels) and are more susceptible to vibration damage and acid leaks.

AGM batteries, on the other hand, offer several advantages. They are sealed, maintenance-free, and spill-proof, making them safer and more convenient. Their internal construction makes them highly resistant to vibration, which is beneficial for heavy-duty trucks. AGM batteries also typically offer more consistent power output, faster recharging capabilities, and a longer lifespan, especially in vehicles with higher electrical demands, such as those equipped with accessories like winches, auxiliary lighting, or advanced sound systems. Given the robust nature of the Silverado 2500HD, an AGM battery is a smart investment for enhanced reliability and performance.

Post-installation relearn / reset procedure

After replacing the battery in your 2016 Chevrolet Silverado 2500HD, it's important to understand the potential for system resets and what, if any, "relearn" procedures may be required. Unlike some vehicles with very complex battery management systems that require dealer-specific scans, the 2016 Silverado 2500HD typically has a straightforward process.

1. Engine Control Module (ECM) & Powertrain Control Module (PCM): The ECM/PCM will likely lose some learned parameters, such as idle air volume and fuel trim. These will be relearned automatically as you drive the vehicle over the next few drive cycles. You might notice slightly rougher idle or different shift points initially, but this should normalize quickly.
2. Window Express-Up/Down: If your power windows have an "express" feature, you may need to reset them. To do this, roll the window all the way down, then hold the switch up until the window is all the way up and continue to hold it for a few extra seconds after it closes. Repeat for all affected windows.
3. Radio Presets & Clock: These will need to be manually reset.
4. Steering Angle Sensor (if applicable): While less common on this generation for a simple battery disconnect, some vehicles may require a steering angle sensor recalibration if warning lights appear after a battery change. This typically involves driving straight for a short distance. If a warning light persists, consult your owner's manual or a service professional.

General Tip: Always ensure the new battery is fully charged before installation and that all terminals are clean and securely fastened.

Signs of a failing battery

Recognizing the signs of a declining battery can save you from an unexpected breakdown. Keep an eye out for these common indicators:

• Slow Engine Crank: Your engine turns over more slowly than usual when you try to start it. This is often the most noticeable symptom.
• Dim Headlights & Interior Lights: When the engine is off but accessories are on, lights appear dim. They might brighten slightly when the engine starts (if the alternator is working correctly).
• Warning Lights: A battery warning light or "check engine" light might illuminate on your dashboard.
• Corrosion on Terminals: White or bluish, powdery buildup around the battery terminals can indicate a poor connection or that the battery is venting acid.
• Swollen Battery Case: If the battery case looks bloated or swollen, especially on the sides, it's a sign of internal damage and overheating.
• Foul Odor: A smell of sulfur or rotten eggs coming from the battery can indicate a leak or internal short-circuit.
• Clicking Sound: Instead of a strong crank, you hear a rapid clicking sound when turning the key, indicating insufficient power to engage the starter motor.
• Electrical Component Malfunctions: Power windows operating slowly, intermittent radio function, or other erratic electrical behavior can sometimes be attributed to a weak battery.

Common battery issues for this generation

Owner reports and service bulletins for the 2016 Chevrolet Silverado 2500HD typically point to a few common themes regarding battery and charging system performance.

• Accessory Drain: Like many modern trucks, the Silverado 2500HD has numerous electronic modules and accessories that draw power even when the vehicle is off. If the truck sits for extended periods without being driven, or if aftermarket accessories are incorrectly wired, parasitic drains can prematurely deplete the battery.
• Alternator Performance: While not a battery issue directly, a failing alternator will lead to a dead battery. Owners should be aware of charging system warning lights and ensure the alternator is properly charging the battery.
• Corrosion: Due to the severe under-hood conditions, especially for trucks used in harsh climates, battery terminal corrosion is a persistent issue. Regular cleaning and application of anti-corrosion sprays can mitigate this.
• Dual-Battery Balancing (Diesel): On diesel models with dual batteries, it's crucial that both batteries are in good health and are replaced together. If one battery starts to fail, it can put an undue strain on the other, shortening its life and potentially leading to premature failure of the entire system.
• Cold Weather Performance: As with all batteries, extreme cold can significantly reduce performance. Ensuring the correct CCA rating and considering an AGM battery for better cold-cranking performance is beneficial for this heavy-duty truck.

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