45 degrees, drove three miles downtown, parked, came back three hours later and the key fob would not open the lock. Used the key to open the door (which set off the alarm), got inside, there was a clicking sound and the alarm switch was blinking. Nothing I did would turn it off. The alarm went off when I opened the glove box to grab the manual and again when I opened the hood to see if I could pry the positive cable off of the battery (I could not). Walked home, grabbed the other fob (which I thought had new batteries?) drove the truck back and the second fob did nothing. The car door is unlocked.

Any suggestions?