Hey everyone, new to the site and i already love it. i have a 99' tahoe i bought i little over a year ago. and so far it's been GREAT, I LOVE it. best vehicle i've ever owned. Anyway, i've noticed when the weather gets hot (80 to 90 degrees) the drivers side and passenger side front electric door locks do like to work, the back doors work fine. when i unlock them they work fine but if i go to lock them back within a couple minutes they wont work. the swith moves a little bit, and i hear the motor locking but not enough to lock the door...... then when i run the truck for about five minutes they work fine.......... are my motors just going bad???