Fair warning.

If you buy a GM style fan clutch from A 1 Auto 1aauto.com just be aware of how they operate.

I bought a fan clutch from them via ebay ($79) and it came in a plain box marked "made in China".
It does not release at all, but runs at full speed.
When I contacted them, they asked for the full VIN on my vehicle, which I'm not going to broadcast.

When I described the fitment and the Dorman 620-602 fan used, they replied that they would not replace nor refund, as the part had been used on an application that they do not approve.

Buy from them at your own risk.