About a month after purchasing my truck my key fob wasnt working some of the time. it would unlock when I left for work but would not lock when I got there. It has also happened the opposite way or not at all, other times it will work perfectly from several feet away. My first assumption was a dying battery. Replaced it and issue continued. took the truck the the dealer I purchased it from and they could not fix it since they are not a Chevy dealer. Went to a Chevy dealer next, they suggested a new fob. With the new fob the issue is still present. Any ideas on what could be causing the problem and any possible fixes would help alot.