Recently the keyless entry stopped working for my 2001 chevy blazer. I have changed the battery and confirmed the battery is good using a multi-meter. I followed the instructions on this forums for programming the keyless FOB part # GM/LEAR 15043458 with the truck and the truck responds to the remote when you press and hold the unlock and lock buttons for 5 seconds. However after taking the truck out of programming mode and trying to use the fob to lock/unlock the doors it still does not respond. Any suggestions that I haven't covered?