power door locks not working when warm

[95escahoe]

I have a 95 Tahoe, and its been warm the last few days and after you use the button on the door to lock the doors a few times via remote or the lock button on the door they wont lock anymore this happened a few times late last year and was fine all winter till now when they go to lock they go down but not all the way, it kinda comes and goes doesn't happen all the time but more often then not, does anyone know what the problem might be? thanks for the help

 

[SunlitComet]

sound like age and temperature extremes taking it's toll on your parts. They just wear out or your linkages are getting stiff.