All you do is get a little pocket flat head screwdriver.
Flip the key open, then put the blade in the cut line between the two key halves now visible where the key shank was.
Give the blade a twist and the two halves will pop apart.
Once apart, the battery is in the half that the key is NOT attached to. Pry off the back side of that half and there is the battery.
Hope this helps-it was more difficult to try to explain clearly than you think!!
thanks to Jason for this answer
PS no need to remove the little screw in the back of the remote. I have no idea what this does.
romeo
To change the battery in a 2004 Avalanche remote control, first, locate the small slot on the side of the remote. Use a flathead screwdriver or a coin to gently pry it open. Remove the old battery, noting its orientation, and replace it with a new CR2032 battery, ensuring the positive (+) side is facing up. Finally, snap the remote back together and test its functionality.
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