I have a 2000 sable ls premium. When the temperature reaches hot 90-100 and the sun is beating directly down on the car, the alarm goes off. Anyone else have this happen? How do i fix this?

Where do you live, Arizona? Sounds like the heat and or direct sunlight is making the security system malfunction. Is there an eye on top of your dash near the defrost outlet, closer to the passenger side?

no new york, I thought that eye was the sensor for the autoheadlights when it gets dark out