How to change a battery on a Chevrolet pickup

Replacing The Battery In Your Cadillac Key Fob Replacing the battery before it dies will save you from having to replace the fob, reprogram it, and, if nothing else, getting stuck on the side of the road. Find the seam on the side of the fob and, using a small flathead screwdriver, pry the seam open on both sides. Take the cover off, remove the circuit board - use the screwdriver to pop it out - and swap the batteries out. Then close the case back together, and you're done. It's really simple; just be careful with the circuit board and battery contact while you're in there.

VW Remote Key Battery Replacement Quick Easy Here is a link for a video to help you. You'll need a flathead screwdriver to open up the key fob.

Flip open key. With small tweezers, file, or jewellers screwdriver, depress release button found in key-slot (near the end of the fob with the key on it. Pull two halves of fob apart. Separate the remaining fob in half again (the part without the key) by prying in the slot on the open end. Replace battery. Reassemble.

To replace the battery:
1. Press the button to flip out the key.
2. Turn the key fob so the metal key stick out to the right and the channel that the key fits into is facing you. (The VW logo on the fob will be facing up)
3. Look closely inside the channel. It is split vertically. On the left hand side of the vertical split, it is also split horizontally.
4. Insert a flat blade screwdriver into the horizontal split and twist. They key fob will come apart, revealing the battery.
5. The replacement battery is a 3 volt CR2032 'button cell' and is commonly available.
6. Replace the battery with the + side facing down.

Assuming you're talking of the key fob, separate to the key (earlier version), then my Owners Manual, page 3-5 describes...

"1. Insert a small screwdriver into the slot and gently pry open the transmitter."

(refers to a slot on the side of the fob where the keyring is held)

Replacement is a CR2025