Thanx for the links.
I was wondering if anyone knew of an oem gm style switch at the lower temp i wanted (185 turn on)I know fuel injected vehicles run at higher temps. I wanted an oem switch in case it ever failed, replacement would be easy at any local auto store.
Anyway i will probably just end up running dual switches and relays. My fan is a 2 speed.
Switch 2 (185 turn on)
Switch 1 (195 turn on)