Battery is removed and the keys are inside - Locks & Locksmithing

wrong site notify locksmith

When replacing the key fob battery there is no reprogramming required! If the key fob was working prior to the battery replacement then it would point to the contacts not being correct! Remove key fob battery and start again!

Either the battery inside the fob key is flat.If it works the door locks etc then it is not the fob key battery, If your key/s have been dropped it could be a broken wire on the solenoid inside if so carefully disassemble the fob key and gently remove the circuit board solder the wire back down re-assemble the fob key & try that if this doesn't work or it is not the case then contact the dealer for further assistance.

Battery is dead, replace battery and have proper amp to ignition and should be able to start and remove key, somewhere inside column there should be a switch that you should be able to press and remove key as well.

Jump the battery and remove the keys.

If the battery is dead, the ignition keys will not release from the ignition. If there is no signal from the transmission shifter that it's in park since the battery is dead, then the ignition lock will not release the keys.  After charging the battery or jumping the blazer to start it and the key's still will not release, try this. 
There is a "plunger" as part if the ignition. Under the steering wheel there is a small removable cap that you can take off and put a small screw driver up into and press the plunger in and it will release the key. Good luck and hope this helps, Keep me posted be glad to help. 

There are (2) batteries (CR2025) inside the remote key which can be replaced. You remove the spare key and the top of the remote can be pried open.

remove the keyring from the fob open it and replace the watch battery in it

Key override
If your electronic lock fails or you do not have any codes
available, you may use a key override to access this unit.
1. Remove the battery cover, disconnect and remove the
battery holder.
2. Insert the skeleton key (second set of keys provided)
into the key hole inside the opening for the battery.
3. Turn the key to the right.
4. Turn the four-bitted key to the right.
5. Open the door.

You can download the user manual here:
http://www.sentrysafe.com/pdfs/OwnersManuals/172967.pdf