went to the store the other day. locked my truck. came back to leave and it would not unlock. went back in to the store and bought a new bat for my remote. still wont unlock or lock with the remote. the only way I can lock my truck is from inside my truck. any body have any help on this? truck is a 2010 f150 stock alarm.

 

There should be a process to add remote. Might try that and see if it starts working again.

 

yep! Have both sets of keys with you when you do this. Keep drivers door open and with one set of keys turn on then off 8 times quickly. Do not take the key out of the ignition. Then press the lock button on each of your fobs including the one in the ignition. It should reprogram the remotes to your truck. I have had to do this numerous times with my after market flip key.