2000 Silverado

Has anyone used the auxillary output of an alarm to hook up the seat heaters.?

Yes, you have to go into both doors, disassemble the switches, and hook a relay to each side of the switch.  I think I have pictures if you need.  Very easy.

Yes, that works well with the remote start engaged. I have a 2002 silverado with a compustar 2000AS. The ouput I am using switches the seat warmer on only when the remote start has the igniton powered up, when you cut the remote start, or it times out the seat turns off too, beautiful. Now im trying to figure out the cargo light on another output, but I can't break down that switch far enough to perform the operation described above. Probably going to be along the lines of a timed relay triggered from the (-) pulse from my output. When I figure it out I will put it up.