Doors Won't Unlock - Sometimes

[JohnnyR]

Occasionally the doors on my 2005 GMC 2500HD won't unlock with the key fob. You can hit the lock button on the fob and they will lock, and sometimes if you hit the lock button several times then unlock, they will unlock. But not always. Changing the battery on the fob seems to help for a week or so then it does it again. Also acts up if there's a big temp or humidity change. Any guesses? I'm thinking a loose connection somewhere but where should I look?

[christophersond]

I've had the same problem with a couple of key fobs. The problem was a loose connection where the battery holder is soldered to the circuit board of the key fob. A quick dab of solder fixed the problem for me. :)