Can anyone tell me if the new 06 fan is electronically controlled?

If someone tests drives, please test this. Does the fan click on with AC button on?

Basically wondering if it is an EV

Or look for a wiring harness running down a support strut, toward the center of the fan clutch.

I sure hope not. I wouldn't want my fan on just because my AC was on.

You would like your fan to come on when you are not moving and the a/c is on. Otherwise your pressures keep going higher on a/c untill it takes out the compressor or blows the pressure relief valve.

It apparently is an Electro-viscous design. Usually many inputs, including ac demand.

What I really want to know is, is it retrofittable to earlier LLY's!

You would like your fan to come on when you are not moving and the a/c is on. Otherwise your pressures keep going higher on a/c untill it takes out the compressor or blows the pressure relief valve.

Seems it hasn't been an issue in the last 20+? years of GM trucks.

Max Power

It has been demonstrated that a fan augmenting flow across the condenser vastly improves ac performance, but that is not the main purpose of an EV.

It's smarter concept actually cools in response to things like coolant temp. The existing fan does not, and I firmly believe this was brought in to assist with heating issues many of us are facing. Better ac in the process? I won't complain.

Tranny gets hot crawling in the sand, ...extra flow. It is a wonderful advance, if you accept the complexity that runs with it.

It apparently is an Electro-viscous design. Usually many inputs, including ac demand.

What I really want to know is, is it retrofittable to earlier LLY's!

KB, did you get confirmation that it is EV?

If it is, I doubt it would retro. Unless it could be harnessed into something else, and programmed with a flash.

I did notice last night as I was working on Getto CAI part Duex, the oil filler neck, which is the upper connecting point of the new fan system, is bolted in, which would make it much easier to retro...

I'm not really looking to get into an argument. I don't doubt that this would solve a lot of problems for a lot of people. I don't have those problems and personally I wouldn't want my fan engaged every time my A/C is on. My A/C is on all summer, all the time and this would greatly decrease performance and fuel mileage for me. My A/C performs as well as I could ask for under the conditions I am in. Perhaps the algorithm would be smart enough to not have the fan on when air flow is sufficient at highway speeds. If that were the case and the fan were on at idle when the A/C was on they would probably have something. We'll know when we have more information I guess.

Perhaps the algorithm would be smart enough to not have the fan on when air flow is sufficient at highway speeds. If that were the case and the fan were on at idle when the A/C was on they would probably have something. We'll know when we have more information I guess.

It does exactly that Max Power. The designs I have seen anyhow.

But consider this, our recent deliveries, have no speed induced flow over the condenser. Hard to believe, but part of the overheating testing discoveries revealed this, and so we have targeted ways to improve inherrent flow into and through the cooling stack.

Like you said, that's more of an issue to a guy whose roadtop temps are 160 F.

Seems it hasn't been an issue in the last 20+? years of GM trucks.

All of the gm's for the last 20 years have had a fan clutch right? So the fan is still drawing some air over the condensor while it is not moving. The fan is still moving when the truck is parked. If it had true electric fans and no fan clutch then your a/c would go to **** when not moving and fan was not on.
My 1994 nissan truck the fan clutches kept going out and when they go out they are locked on all the time. So it was about killing it driving with the fan locked all the time. Even broke some of the plastic fan blades. So I removed the fan clutch and fan. I would turn the a/c on when driving and accidently left it on once in buisy trafic. Blew the pressure relief plug. Installed a electric fan with its own stat to turn it on and off and a manual switch for when the a/c was turned on. Worked great. More power, and better gas mileage.
I wouldn't hesitate for a second to put electric fans on anything. the power and gas mileage probably wouldn't be affected as much on a dmax as it was on the little nissan.

I was never arguing that there should be no cooling fans at all. Just that my setup works very good for me. The current setup works well for many people. An electric clutch would most likely work better for some cirumstances. I was just stating that I wouldn't want my engine drive fan 100% on all the time when my A/C was on.

From what I understand there are no electric cooling fans on the market that can move anywhere near the volume of air that the current setup does.

badass

you won't have that luck with the d-max. As soon as you strap a heavy load in 110 wx you will overheat. The elecs don't have the pull for this monster stack.

Oilbrnr, Fingers recognized it as one, yes. I'm going with that

To be honest with you if I were having problems I would probably stick one or two electric fans on the front to push air through the rads. Hopefully this would prevent a overheating problem before it occurs and it would probably save the fan clutch from engaging quite a bit. I would assume it would also supplement the fan clutch in moving air through the stack when both are running (assuming this is even an issue) The only downside that I can see is that the electric fans might create a restriction in cooling when not in use or possibly even when the fan clutch is engaged.

I have very little real world experience with this so perhaps my idea is totally out to lunch. It's just something that makes sense to me but could easily be wrong.

I agree with what both of you are saying. I won't worry about it untill I start having some problems. It would be nice if you could replace the fan clutch system with a electric fan, but you can't and if it aint broke I aint going to fix it.
Supplementing with electric fans could work, but I havn't had any issues yet. Besides I don't wont to screw with anything that could void the warranty. I wouldn't think they would void the warranty for adding some electric fans, but possibly could if you removed the stock fans and put some electric ones in. (Even though you can't because they don't make electric fans to move enough air)
The set up worked great on my little nissan though. the dmax rocks :ro) compared to the little nissan. I do miss the better gas mileage and easy manuvering of the little nissan when driving around town though.