Hayden® 2786 - Severe Duty Thermal Engine Cooling Fan Clutch for 1996-2006 GM Trucks with Heavy Duty V-8

This fan clutch works great on my 2001 chevy blazer. It also fits like OEM on my OEM waterpump shaft and my OEM stock fan. Took me 15 minutes to install.The fan to clutch torque spec is 24lb-ft.This fan is much louder than the stock fan. My old stock fan clutch finally went out after 22 years.This Hayden severe duty clutch keeps my engine from overheating on hot summer days when I let the car idle with the AC on. The temp gauge stays right at 195 all day long, when before with the worn out stock fan clutch, it used to creep upto 210 and beyond when idling for more than 10 minutes. I live in South Carolina and the heat in the summer is brutal, and it doesn’t really go below 32F in the winter, so this clutch really works great for me.When I do cold starts, the fan fully engages, but when I pull out of my neighborhood, the fan disengages and stays at 20-25% engagement just like the stock fan clutch would, so once you are moving it isn’t loud at all. When I stop in traffic, and get going again, the fan would stay engaged for a little bit until I go above 20-30mph, which is normal, since when your not moving, it needs more airflow to stay at the correct temp.If your fan stays engaged all the time with this fan clutch , you got a defective fan clutch. This fan clutch behaves like OEM. It’s just much louder when it needs to cool down the engine, and it’s only louder because there’s a lot more Airflow with this clutch. Stock clutch when fully engaged is about 55-60% of the waterpump speed, but this Hayden severe duty clutch is 70-80% when fully engaged.I am 100% satisfied with this clutch, and I would recommend this fan clutch as an OEM replacement.

Kinda noisy at first but it quiets down after a few minutes.

Some reviews complain about the noise. It's really not that serious. Yes it's a little louder than normal but only for the first 5-8 min until the engine warms up then you can't hear it anymore. For the price and it's performance, I highly recommend this. My 03 Silverado doesn't overheat anymore.

I looked long and hard for this because no store carries this anymore. Every truck I've ever had, I equipped with one of these. Now this is the only place to find it. Works perfectly, as always. Drops your coolant temps on those massive road trips or high stress environments where you have to move a lot of air quickly. By doing so, it increases your AC efficiency and makes it cooler as well. This was a very tough find for my 03 Avalanche and I'm telling you now....GET THIS!!

Fan clutch works really well .

Bought item because t say it fit gmc 3500 8.1 l wellit does fit but is not the appropriate part for it 8.1l engine the diameter is smaller and I have noticed it uses more fuel it does move air through ac condenser and radiator no problems on that field and the temperature on the engine nd transmission is little hotter but is noticeable so I reinstall the old one and everything is back like it was before I only replaced it because I was in the need to replace the old radiator the it sprung a leak on the upper plastic part other wise I wouldn't mess with it manly because you had to remove the entire front of the engine and sides parts too be available to remove the radiator

Needed to replace the fan clutch on my '98 GMC Sierra. Hayden makes good stuff; I've had previous good experiences with their fan clutches and transmission coolers. Hayden makes their stuff ...at least this fan clutch ...in the USA. Overall this is an excellent quality part that comes with good installation instructions.If you aren't going to put the fan in right away, pay attention as to how you store it. Keep the clutch sitting on the fins with the large nut upwards; don't set it on its side either. This is to keep the silicon "fluid" in it's proper position until it is installed. I think there is a marking on the box or something stamped on the clutch itself.This Hayden works as good as the original GM unit (which was probably made by Hayden). I have not noticed any undue fan noise that some of the other reviewers are experiencing ...but I haven't had it through the winter yet. I installed the clutch mid-summer and live in the Southeast. My truck does not have either the heavy duty cooling system or any tow package.You will need a very large open end wrench or large Crescent wrench to remove and tighten the nut. Using a fan clutch tool can make this job a snap.

First off amazon says it doesnt fit 03 silverados but it fit my 03 silverado 5.3 perfectly fine as this was the part number i got from rockauto. I had to buy this because my truck began overheating after hours of idling with ac and stop and go driving in chicago traffic and delivering packages while it was 100+ degrees out and even hotter with humidity. I ordered this and noticed a difference immediately. Its MUCH louder (which i personally enjoy i love hearing the loud WHOOSHING) and on cold starts it takes a little longer to get to operating temp. Havent had another scorching hot day yet but its gotten to around 90 and this clutch does a great job keeping temps down and my ac nice and cold. No more heat stroke for me and my passengers! Will update if another extreme heat wave comes through