How to Replace the Battery in a 2009 Hummer H3 Key Fob

How to Replace the Battery in a 2009 Hummer H3 Key Fob

If your auto key is not open doors perfectly, the cell battery most likely needs to be changed. In this article, we are going to tell you how to open Hummer remote key fob and change a weak battery DIY. If you choose to do it at home near H3, use this instruction, but don't forget to check all you need before you start.

What type battery does 2009 Hummer H3 remote key fob take

Before you start to disassembly keyless entry remote make sure that you have all required tools and materials: flat head screwdriver and one CR2032 battery.
  • 1xCR2032 battery
  • flat head screwdriver

Simple steps to change the battery in your car's keyless entry remote

A tiny coin battery installed inside the your remote key fob. Gently try to pry apart your remote key fob with flat head screwdriver. Replace 1 CR2032 battery with flat head screwdriver.

Get new battery and install it in fob’s case. Every battery has a negative and positive side and if you put the wrong connector down, the current cannot go into your circuit board and make it work. Check position on battery, by "+" mark.

Before assembling keyless entry fob's case, make sure that everything is functioning by pressing buttons on keyless entry remote.

At this point squeeze fob’s back cover together. Line your shell pieces together and put it in place by hands from top to bottom. Inspect your remote key fob body for gaps. If it is not tightly closed try to repeat last step.

Video of keyless entry remote disassembly

How To Replace A 2006 - 2010 Hummer H3 Key Fob Battery

Still not working? Buy new one


Keyless entry remote of Hummer H3 require 1xCR2032 batteries. Most CR2032 batteries are under $4 depending on the size packaging, type and brand you buy. Take your old battery to the store, to be sure.

Often, after key battery change, reprogramming not required. Remote key fob reprogramming procedure often described in user's manual of your vehicle.

Replacing your key fob battery is easy to do in 2009 Hummer H3. Most of car manufacturers think about clients and make a special hole for key fob open.

The cost to replace the battery inside remote key fob is $50-600 depending on the brand and the service pricing.

Remote key fob batteries in modern cars should be changed once in three or four years, but this will vary based on their amount of use and build quality. If your keyless entry remote decreased signal strength, you should change batteries before it stop open doors and make trouble for you.

If your auto signal strength reduced, key fob buttons not working, need multiple clicks to unlock or lock doors or has low key battery indicator on dashboard, in most cases battery replace inside key fob needed. Currently installed battery is dead with a high probability, but if it's not help to fix issues, key fob replace or repair needed.
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Other Hummer Models:

Fob Compatibility:

  1. FCC ID: L2C0007T
  2. Models: 2006-2010 Hummer H3