2022 GMC Yukon Battery Size & Replacement Guide

As an ASE-certified master technician, I’ve seen my fair share of late-model SUVs roll into the bay with strange electrical gremlins that ultimately trace back to a weak battery. The 2022 GMC Yukon is a massive vehicle with a massive electrical appetite to match. Between the advanced infotainment system, auto start-stop technology, and driver assistance features, having the correct battery is non-negotiable.

Here is your comprehensive guide to the battery specifications, replacement options, and installation procedures for the 2022 GMC Yukon.

Quick answer: 2022 GMC Yukon Battery Specs

When it's time to replace the battery in your 2022 GMC Yukon (whether it’s the 5.3L V8, 6.2L V8, or 3.0L Duramax Turbo-Diesel), here are the exact specifications you need to look for:

• BCI Group Size: Group H7 (also known as 94R). Some base trims with fewer electronics may accept an H6 (48), but H7 is the standard for proper fit and capacity.
• Cold Cranking Amps (CCA): 800 to 850 CCA (Gas engines) / 850+ CCA (3.0L Duramax diesel).
• Reserve Capacity (RC): 140 minutes is the standard baseline for this group size.
• Battery Type Requirement: Absorbent Glass Mat (AGM) is strictly required. Do not use a standard flooded battery.
• Terminal Layout: Standard SAE top posts, Right-Hand Positive (Positive on the right side when facing the front of the battery).
• Physical Dimensions (H7/94R): Approximately 12.4" Length x 6.9" Width x 7.5" Height.
• Dual-Battery Setup: While heavy-duty diesel trucks often use two batteries, the 3.0L Duramax in the 2022 Yukon utilizes a single, high-capacity H7 or H8 AGM battery.

Replacement battery options

Finding a high-quality replacement battery is easy, as the H7/94R size is extremely common. Here are top recommendations from trusted brands:

1. DieHard Platinum AGM Battery (Group Size H7/94R): Part No. H7-AGM. Provides 850 CCA and is engineered specifically to handle the demands of start-stop technology.
2. Interstate MTZ AGM Battery (Group Size H7/94R): Part No. MTZ-94R. Offers 850 CCA and exceptional deep-cycling capabilities.
3. ACDelco Gold AGM (Group Size H7/94R): Part No. 94RAGM. The OEM-equivalent replacement, offering 850 CCA. Highly recommended to keep the factory electrical systems happy.
4. Optima YellowTop AGM: Optima makes an exact-fit H7 replacement (Part No. DH7) that features their advanced flat-plate AGM design, yielding excellent reserve capacity and 880 CCA.

AGM vs flooded — which does this vehicle need?

The 2022 GMC Yukon absolutely requires an AGM (Absorbent Glass Mat) battery.

Why? Modern GM vehicles are equipped with auto start-stop technology, meaning the engine shuts off at red lights to save fuel. During this time, the battery alone must power the HVAC, infotainment screen, headlights, and safety sensors. A standard flooded lead-acid battery simply cannot handle this repeated deep discharge and rapid recharge cycle. Installing a standard flooded battery in this Yukon will result in premature battery failure (often within a few months) and could trigger erratic dashboard warning lights or cause the start-stop system to fail.

Post-installation relearn / reset procedure

The 2022 GMC Yukon uses an intelligent Battery Management System (BMS). The BMS tracks the age, health, and resistance of the battery, gradually adjusting the alternator's charging output as the battery degrades.

When you install a fresh battery, the BMS must be reset. If you skip this step, the alternator may overcharge the new battery, thinking it is still the old, degraded unit.

• Professional Reset: The fastest and safest way is to use an OBD2 bidirectional scan tool to access the Body Control Module (BCM) and perform a "Battery Sensor Reset."
• Self-Relearn: If you do not have a scan tool, GM systems typically run a self-relearn if the vehicle is left sitting entirely untouched (doors locked, key fob far away) for at least 8 hours, though a scan tool reset is always the factory-recommended procedure.

Signs of a failing battery

Since the Yukon has robust computer systems, a dying battery often presents as a computer glitch rather than a mechanical issue. Watch for:

• Auto Start-Stop stops working: The system is programmed to disable start-stop if battery voltage drops below a certain threshold.
• Erratic dashboard warnings: "Service StabiliTrak," "Service Trailer Brake System," or random check engine lights upon startup.
• Slow cranking: A noticeable hesitation when you push the start button.
• Infotainment lag: The central screen takes longer to boot up or intermittently resets.

Common battery issues for this generation

The 2021+ generation of the GMC Yukon is highly reliable, but it does suffer from parasitic draw issues if aftermarket accessories (like dash cams or radar detectors) are improperly wired. Additionally, Over-The-Air (OTA) software updates can occasionally fail or get stuck, keeping the vehicle's computer awake overnight and draining the battery completely. If you experience a dead battery overnight on a 2022 Yukon, always ensure the infotainment software is fully updated.

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