2022 Chevrolet Suburban: Battery Size, Group & Replacement Guide

Quick answer

• BCI Group Size: H7 (also known as 94R)
• Cold Cranking Amps (CCA): 850 CCA
• Reserve Capacity (RC): 140 minutes
• AGM vs. Flooded: AGM required
• Terminal Layout: Top Post
• Physical Dimensions (L x W x H): 12.4 x 6.9 x 7.5 inches (315 x 175 x 190 mm)
• Dual-battery setup: The 2022 Suburban with the 3.0L Duramax diesel engine features a dual-battery setup, utilizing two H7/94R AGM batteries.

Replacement battery options

When your 2022 Suburban needs a new battery, you have several excellent options from reputable brands. Here are a few popular choices that meet or exceed the factory specifications:

• ACDelco: As the original equipment manufacturer (OEM) for General Motors, ACDelco is a top choice. Look for the ACDelco Gold H7/94R AGM battery (part number 94RAGM).
• Interstate: A widely trusted brand, Interstate offers the MTX-94R/H7 AGM battery, known for its long life and reliable performance.
• DieHard: Sold at Advance Auto Parts, the DieHard Platinum AGM H7/94R battery is a premium option with a strong warranty and excellent reviews.
• Odyssey: For those who demand the absolute best in performance and longevity, the Odyssey Extreme Series ODX-AGM94R (H7) is a top-tier choice, offering exceptional cranking power and a deep cycle capability.
• Optima: While Optima is famous for its "six-pack" design, their YellowTop DH7 (9027-127) is a direct-fit AGM battery for the H7/94R group size, providing excellent power for vehicles with heavy electronic loads.

AGM vs flooded — which does this vehicle need?

The 2022 Chevrolet Suburban requires an Absorbent Glass Mat (AGM) battery. This is not an optional upgrade. The Suburban's sophisticated electrical system, including its start-stop technology and numerous electronic modules, demands the stable power and deep-cycle capabilities that only an AGM battery can provide. Using a conventional flooded lead-acid battery will result in poor performance, a significantly shorter lifespan, and may even cause electrical issues with the vehicle.

AGM batteries are designed to handle the frequent, high-current demands of modern vehicles. They are more resistant to vibration, are completely sealed and maintenance-free, and offer superior performance in a wide range of temperatures. While they come at a higher initial cost, their longevity and reliability make them the correct and most cost-effective choice in the long run for your Suburban.

Post-installation relearn / reset procedure

After replacing the battery in a 2022 Suburban, a battery relearn procedure is necessary to ensure the vehicle's charging system operates correctly. The Body Control Module (BCM) monitors the battery's state of health and age to optimize charging cycles. Simply swapping the battery without telling the BCM can lead to overcharging or undercharging the new battery, significantly reducing its lifespan.

While some sources suggest a manual procedure (e.g., leaving the vehicle off for a set number of hours), the official and most reliable method is to use a professional OBD2 scan tool with battery reset functionality. This tool connects to the vehicle's diagnostic port and allows a technician to inform the BCM that a new battery has been installed. This resets the battery monitoring system and ensures the new battery is charged properly from day one.

Signs of a failing battery

Even a high-quality AGM battery will eventually wear out. Here are common signs that your Suburban's battery is on its way out:

• Slow Engine Crank: The engine turns over more slowly than usual when you press the start button.
• Warning Lights: A battery or charging system warning light may illuminate on the dashboard.
• Dimming Lights: Headlights and interior lights may dim, especially during engine start-up.
• Start-Stop System Malfunctions: The automatic start-stop system may become less active or stop working altogether as the BCM tries to conserve battery power.
• Electrical Gremlins: Unexplained issues with the infotainment system, power windows, or other electronics can sometimes be traced back to an unstable power supply from a failing battery.

Common battery issues for this generation

The 11th-generation Suburban (introduced in 2021) has a complex electrical system that places significant demands on its battery. One of the most common issues reported by owners is a premature battery failure or a dead battery after the vehicle sits for a few days. This "parasitic draw" can sometimes be traced to an electronic module that fails to go into "sleep mode" after the vehicle is shut off.

If you experience repeated dead battery issues with a new battery, a technician will need to perform a parasitic draw test. This involves systematically checking the vehicle's circuits to identify the source of the unwanted electrical drain. In many cases, a software update for one of the vehicle's control modules can resolve the issue.

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