ACDelcoGold 36239 Idler Pulley

Good replacement perfect fit

More solid than the OEM part I replaced, so I think it will last a while. I’ll say it’s not an exact match for the part I replaced on my 05 duramax (lly), it doesn’t have a “valley”, but it does seem to work perfectly as a bolt-on replacement and has run without issue for 1k so far.

The edge came damaged, I had to sand it to prevent damaging the belt itself. Come on Amazon you can do better than this. Works fine on a 2005 GMC Sierra 2500 Duramax

With 225 thousand miles the original pulley and still in good condition, the new idler pulley should give me another 225 thousand.

Fit well except a PITA to get belt on due to diameter being slightly larger that OEM pulley

Fair price for a great product.Easy to put on.

Does not have the raised edges on the sides to keep the belt from slipping off it is not a direct replacement

This fit perfectly and looks just like the factory pulley on my Duramax; however, just wiggling it in my hand I detected the slightest play in the bearing--actually, just about the same as the 100k mile pulley it replaced. Maybe that means the factory pulley was just fine (this was a preventative replacement), but the smooth drive pulleys I also replaced (which were making noise) had perceptible play in hand while the AC Delco replacements did not. So, while this is an anecdotal account, we'll see in another 100k miles whether my hand feel is prescient.

Worked great for our 05 escape we use for hunting/fishing

Works perfect. 2009 Chevy 2500 duramax

Great price for Delco pulley, put them on today should be good for the life of my Duramax.

Good replacement

Exact fit