2000 Silverado Fan Clutch

GMC-AT · January 25, 2024

2000 Silverado 5.3L Regular Cab Z71

Hey guys, my fan clutch has been roaring like its running most the time. So I replaced it with the OEM GM part. Didn't seem to help anything.. but I just left it alone for a while. Fast-forward a year, I decided to replace it again with a different (non-oem) fan clutch. Also replaced the thermostat with a stock part. Same issue, maybe a little less roaring..but still seems way too much?

Some notes, the truck never runs hot, always around 195-200 according to the gauge... and the same as all the other Silverado's I have owned.

The fan clutch is active and roaring right from cold start. This doesn't make sense, but I think I do remember reading this may be "by design" for the first few min after cold start.

Any ideas? Maybe replace the T stat with a 165? Not sure if that would help since the fan runs right from cold start anyway.

Oh .. and when I ordered the new fan clutch it did have some options for "trailing package" ...which I do have Z82 RPO. But I don't tow anything. All the fans listed on Rock Auto were "heavy-duty" or "severe duty" fans. I just got the basic heavy duty.

dna9656 · January 26, 2024

You could install a centipedal fan, it flattens out (move very little air) when moving, the supposition is there is enough air moving through the underhood area to provide enough cooling. Lots of guys have used this, I have too.