How to Replace the Battery on New GMC and Chevy Trucks (With Fuse Block)
If you need to replace the battery in your GMC or Chevy truck, the newer models can look a little intimidating at first—especially with the fuse block mounted on top of the positive terminal.
In this guide, I’ll walk you through exactly how I replaced the battery on my 2020 GMC Sierra Denali 1500 step by step. This same process applies to many newer GMC and Chevy trucks and SUVs.
This includes:
- GMC Sierra 1500 / 2500 / 3500
- Chevy Silverado (new body style)
- GMC Yukon
- Chevy Tahoe and Suburban
- Other GM trucks and SUVs with auto start/stop systems
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Understanding the Fuse Block Setup
On newer GM trucks, the battery includes a fuse block (power distribution block) mounted directly on the positive terminal. This changes how you remove and install the battery compared to older models.
The key is carefully disconnecting and moving the fuse block without forcing or damaging any connections.
Step-by-Step Battery Replacement
- Turn off the vehicle completely and ensure all electronics are off
- Open the hood and locate the battery
- Carefully disconnect the negative terminal first
- Remove or carefully reposition the fuse block from the positive terminal
- Disconnect the positive terminal
- Remove the old battery
- Install the new battery in the same position
- Reconnect the positive terminal and reinstall the fuse block
- Reconnect the negative terminal
- Start the vehicle and confirm everything powers on correctly
Important Notes
Some GMC and Chevy HD trucks (2500 and 3500 models) come with two batteries. This guide applies to single-battery setups like the 2020 GMC Sierra 1500 Denali. If your truck has two batteries, repeat the same process for the second battery.
Final Thoughts
Replacing the battery in newer GMC and Chevy trucks is very doable at home once you understand the fuse block system. With a little patience, you can save time and avoid dealership costs.
If this guide helped you, check out more DIY automotive and home repair videos on Lemon Branch DIY.