Took the time to put the Caddy fans in. They can cool a Northstar V-8 stuffed in sideways, they can cool the Tahoe...And does it ever.
I used two Haden temp controllers, and used 2 30 amp add-a-circuits. I looked up the wiring diagram for the year caddy they came out of, and it said that each fan has a 30 amp fuse. I did exactly that, and ran it for a few hours. Not a hot wire in the place. one fan fires at 200, the other will come on at 220. The second fan never turned on until i made it come on by tweaking the settings, then I turned it back. I need to figure out now how to hook fan to up to the A/C as well in addition to the temp controller.
I am very pleased with the outcome, and plan to do a write up. Mileage is unknown yet, but I do know drivability is much better, and it don't come out of OD on hills any longer...pulls like a champ! Well worth the effort!
Shawn