2020 Duramax Battery Replacement: Everything You Need To Know

2020 Battery Removal ? Chevy and GMC Duramax Diesel Forum
2020 Battery Removal ? Chevy and GMC Duramax Diesel Forum from www.duramaxforum.com


If you own a 2020 Duramax truck and are experiencing battery issues, it may be time for a replacement. In this article, we will discuss everything you need to know about replacing the battery in your 2020 Duramax, including tips, recommendations, and step-by-step instructions.

Why Replace Your Battery?

Over time, batteries can lose their charge capacity and become less efficient. If you notice that your Duramax is struggling to start or experiencing electrical issues, it may be a sign that your battery needs replacement. Additionally, extreme temperatures and harsh driving conditions can also contribute to battery deterioration.

Choosing the Right Battery

When replacing your battery, it is crucial to choose the right one for your 2020 Duramax. Look for a battery with the correct specifications, including the correct group size, cold-cranking amps (CCA), and reserve capacity. Consult your Duramax owner’s manual or contact a trusted mechanic for guidance.

Step-by-Step Battery Replacement

Replacing a battery in a 2020 Duramax is a relatively straightforward process. Here’s a step-by-step guide to help you through the process:

1. Safety Precautions

Before starting, ensure that the engine is off, the parking brake is engaged, and all accessories are turned off. Wear protective gloves and eyewear to prevent any accidents.

2. Locate the Battery

In a 2020 Duramax, the battery is typically located under the hood, near the front of the engine compartment. Consult your owner’s manual for the exact location.

3. Disconnect the Negative Terminal

Using a wrench or pliers, loosen the nut on the negative terminal and remove the cable from the battery. Make sure to keep the cable away from any metal surfaces to avoid accidental contact.

4. Disconnect the Positive Terminal

Repeat the same process for the positive terminal, loosening the nut and removing the cable from the battery.

5. Remove the Battery

Depending on the battery mounting system, you may need to remove a bracket or strap holding the battery in place. Carefully lift the battery out of its compartment.

6. Clean the Battery Compartment

Before installing the new battery, clean the battery compartment using a battery cleaning solution. Remove any corrosion or dirt to ensure a secure connection for the new battery.

7. Install the New Battery

Place the new battery in the compartment, ensuring that it is positioned correctly. Reinstall any brackets or straps that were removed earlier.

8. Reconnect the Positive Terminal

Connect the positive cable to the positive terminal of the new battery and tighten the nut securely.

9. Reconnect the Negative Terminal

Connect the negative cable to the negative terminal of the new battery and tighten the nut securely.

10. Test the Battery

Turn on the engine and test the battery to ensure it is working properly. If necessary, consult a professional to check the charging system and perform any required maintenance.


Replacing the battery in your 2020 Duramax is a relatively simple process that can significantly improve your truck’s performance. By following the step-by-step instructions and choosing the right battery, you can ensure a smooth replacement process. However, if you are unsure or uncomfortable performing the replacement yourself, it is always best to consult a professional mechanic for assistance.