2024 GMC Yukon Battery Size & Replacement Guide

As an ASE-certified master technician, I regularly see late-model SUVs roll into the bay with complex electrical demands, and the 2024 GMC Yukon is no exception. Packed with advanced infotainment, advanced driver assistance systems (ADAS), and Auto Start-Stop technology, this full-size SUV requires a heavy-duty power source to keep everything running smoothly. Whether you have the 5.3L V8, the 6.2L V8, or the 3.0L Duramax Turbo-Diesel, installing the correct battery is crucial for reliability.

Here is your comprehensive guide to the battery specifications, replacement options, and installation procedures for the 2024 GMC Yukon.

Quick answer: 2024 GMC Yukon Battery Specs

• BCI Group Size: Group H7 (also known as 94R) is standard for most gas engines. The 3.0L Duramax Diesel and some heavily optioned 6.2L V8 models may require the larger Group H8 (49).
• Cold Cranking Amps (CCA): 730 to 850 CCA for the standard H7 battery; 850 to 900 CCA for the H8 battery.
• Reserve Capacity (RC): 140 minutes minimum (up to 160 minutes on H8).
• AGM vs. Flooded: AGM (Absorbent Glass Mat) is strictly required. Standard flooded batteries cannot handle the Auto Start-Stop system and will fail prematurely.
• Terminal Layout: Standard SAE top post, Right Positive (when viewing the battery with the terminals closest to you).
• Physical Dimensions (H7/94R): 12.4" L x 6.9" W x 7.5" H.
• Diesel Setup: The 3.0L Duramax diesel variant uses a high-capacity H8 AGM to handle the massive glow plug and compression demands during cold starts.

Replacement battery options

When it comes to replacing your Yukon's battery, stick to premium AGM brands. Here are some of the most reliable options available on the market for the standard H7 (94R) application:

• ACDelco Gold AGM (Part # 94RAGM): The OEM replacement choice. Provides 800 CCA and is designed specifically to match GM's factory charging profiles.
• DieHard Platinum AGM (Part # H7-AGM): An excellent aftermarket option offering 850 CCA and exceptional durability against deep cycling.
• Interstate MTX (Part # MTX-94R/H7): Known for robust construction and longevity, offering 800 CCA and a 140-minute reserve capacity.
• Optima YellowTop (Part # DH7): A premium dual-purpose deep-cycle and starting battery boasting 800 CCA, ideal if you run aftermarket electronics, winches, or heavy-duty towing setups.
• Odyssey Performance (Part # ODP-AGM47 H7 L3): Military-grade plates provide extreme vibration resistance and high reserve capacity for demanding power needs.

AGM vs flooded — which does this vehicle need?

The 2024 GMC Yukon absolutely requires an AGM battery. Because this generation of the Yukon features Auto Start-Stop technology, the battery must endure hundreds of engine restarts during a single city commute while simultaneously powering the HVAC, lights, and infotainment. A traditional flooded lead-acid battery charges too slowly and degrades too quickly under these deep-cycling conditions. Installing a flooded battery will not only lead to a dead battery within months but can also void your warranty and damage the vehicle's Battery Management System (BMS).

Post-installation relearn / reset procedure

Modern GM vehicles use a sophisticated Battery Management System (BMS) that tracks the age and degradation of the battery to adjust the alternator's charging output. When you install a new battery, the BMS must be reset so it doesn't overcharge and fry the new unit.

1. Connect a professional scan tool to the OBD-II port.
2. Navigate to the Body Control Module (BCM).
3. Select "Battery Sensor Module Learn" or "Battery Replacement Reset."
4. Follow the on-screen prompts to clear the old battery data.

Note: If you do not have a scan tool, the Yukon's BMS will eventually "learn" the new battery on its own, but it requires leaving the vehicle undisturbed, locked, and untouched for at least 4 to 8 hours (a full sleep cycle) so the module can read the new resting voltage. However, a scan tool reset is highly recommended by GM.

Signs of a failing battery

Since the 2024 Yukon is a newer vehicle, battery failures right now are likely due to extreme weather, parasitic draws, or defective factory units. Watch for:

• Auto Start-Stop stops working: The computer will disable this feature if it detects the battery is too weak to restart the engine.
• Slow cranking: A noticeable delay or sluggish turnover when you push the start button.
• Electrical gremlins: Random warning lights (StabiliTrak, ABS), flickering infotainment screens, or failing power running boards.
• "Battery Saver Active" message: This displays on the dash when the system is shutting down accessories to preserve enough juice to start the engine.

Common battery issues for this generation

The current generation of GMC Yukons has immense parasitic draw. Even when turned off, modules for the passive entry system, OnStar, and over-the-air (OTA) updates routinely wake up and consume power. If the vehicle is parked for weeks at a time without being attached to a battery maintainer (tender), the AGM battery can drain completely. Additionally, if the vehicle is primarily driven on very short trips, the alternator never gets enough time to replenish the heavy energy spent during starting.

If you're dealing with electrical issues, need a battery tested, or want a professional to handle the BMS relearn procedure, don't risk a DIY disaster. Find a trusted shop on Repairius.