Yeah, it does. I was melting (not blowing...actually melting) 30 amp fuses. After asking around, the consensus was that the low speed draws up to 25 amps while running and the high speed draws up to 35 while running.....and if starting up on the high speed wire (which can happen if you re-start the engine after it's warmed up), it can draw around 80 amps momentarily.

After getting it all in and working out the bugs...I love the thing....it's perfect. With the SPAL fan controller and can adjust the thing for the weather. In the heat of the summer I start the low speed at 160 and the high speed at 195. That keeps my temps at 195 when the outside temps are near 100. When the weather cools, I'll re-adjust it so that the low speed comes on at 170.....maybe 175.....and it's easy to re-adjust....just unplug the fan and let the motor warm up....when it hits the temps you want the fan to come on low, you press a button....when it gets to the temp yuou want the high speed fan to come on, you press a different button.

The one thing I really love fan mod is the throttle responce....definetly noticable....no hesitation when accelerating, even at highway speeds (but that is with a 3.4L)

It took a while to work out the bugs on the whole thing though....the one that really drove me nuts was that a stock 3.4L runs at about 210 degrees on a hot day. I couldn't live with that, so I went with a 160 degree thermostat.....which solved the problem nicely.

The other bug (that I just got fixed tonight) was the draw on my old alternator. Granted mine had about 175K miles on it....but at night with the high beams on and the high speed fan running, my volt meter read just 12.0 volts (and that was with the motor at 2500 rpm). I just instaleld a 100amp at idle and 140amp max alternator and now my volt meter reads 14.0 max and 13.0 with ALL accessories turned on.

If you do this mod, I highly recomend the SPAL fan controler. It's pricey (about $110) but well worth it. The Haden controller is a lot cheaper...$34...but I've read too many post about them failing regularly to even consider it. And regardless of whihc controller you go with, make sure you wire it up with 40-amp relays to handle the high speed wire and use MAXI fuses (they look like giant atc fuses and go up to 100 amps....although a 40amp fuses is all that's needed).