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Your cart is empty.GM Genuine Parts Drive Belt Tensioner Assemblies are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These assemblies are spring-loaded pulleys designed to draw tension on your vehicle's serpentine belt. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).
E5USMC
2025-08-25 15:23:13
Amazonconfirmedfit indicates this part will not fit a 2006 Chevy Express 2500 4.8 Liter, but that is incorrect. I just installed this part in a 2006 Chevy Express 2500 4.8 Liter and it's a perfect fit.After some research I discovered that GM discontinued the three bolt mount for a 2006 Chevy Express 4.8L Van. GM replaced it with this two bolt mount part: GM 12609719 Drive Belt Tensioner
Happy Camper
2025-07-20 14:44:54
The media could not be loaded.
Jerome L
2025-07-19 15:37:20
Easy to replace, works flawlessly! Replaced the idler as well as the belt and it's fully squeak free
C Soul
2025-06-04 12:02:36
Thought this was the wrong part till I came back to the Amazon info and read “ 2 BOLT DESIGN REPLACES 3 BOLT DESIGN, DISCARD UNUSED BOLTâ€. Thanks Amazon for being on top of this!!!
John K.
2025-05-18 12:15:34
I had an intermittent squealing noise. So I changed idler, the AC belt and tensioner, the alternator, and the belt... all with ACDelco brand. The alternator, the idler, and the AC tensioner all had bad bearings. After changing all those parts, it still squealed when cold (winter temps). I checked all other wheels and bearings and nothing else felt suspicious or rough. I eventually narrowed the noise down to something with the belt and not worn out pulley bearings because spraying the belt with water make the noise go away. I washed and degreased all the pulleys too. Still squealed. Either there is a pulley misalignment or something else causing intermittent belt slip.Finally, I changed this belt tensioner. I saved it for last since it was already changed about 8 years ago (maybe 35k miles?) with an ACDelco purchased from the dealer. I think the squealing is finally gone.Apparently belt squeal is a real common issue on these Silverados and there are a ton of online videos that talk about pulley bearings, pulley alignment, belt contamination, brand of belt, etc. I was misled by one video where they showed some side-to-side wiggle in this tensioner wheel and specifically stated that was the reason it was bad. Well, come to find out either all off-the-shelf tensioners are bad or the mechanic in the video was wrong. My bet, mechanic was wrong. So far, I've examined my original ACDelco, this new ACDelco, a new ACDelco pulley wheel by itself, and a Gates brand tensioner - ALL FOUR have the same amount of wiggle in the pulley wheel bearing. What's the difference with this new one? Why did my squeal go away finally? It seems like the spring tension in this new one is a lot greater than the one I was using. Even though there were low miles and good bearings in the pulley, it was just maybe too old and not holding the belt properly.Tighter spring means tighter belt, which means less slip => less noise.
Tmizer
2025-05-13 17:39:53
OEM QUALITY… easy install. Fast delivery and less than parts store
Milo
2025-04-30 17:32:56
First one lasted 100k. Should be good to go for as long as I need it to last. This part was less expensive than name brand aftermarket too.
Tom P.
2025-04-28 18:39:08
I bought this as a replacement for my 2008 GMC Yukon Denali and it fits perfectly - I previously had a 3 bolt model, and this one is 2 bolt, but makes no difference performance wise. It holds tension like the previous model, I just bolted the leftover bolt back into the same place on the engine.So far after 1,500 miles of use, no noise, good tension, no slip. Great quality as expected from ACDelco.
Daniel
2025-03-31 11:17:39
Doesn't matter if the idler pulley you removed has 3 mounting holes. Mine did and I still installed this one, just threaded in the extra bolt and torqued it to spec the same. They are otherwise identical aside from the extra mounting hole. If your water pump has ever been replaced, then you actually have no way of knowing if your truck originally had 2 or 3 mounting holes.Just install this and don't worry about it.
Robert L.
2025-03-21 16:12:14
Worked perfectly, make sure you check if you need this 2 bolt one or a 3 bolt. I got this as a warehouse deal because it was shipped and opened by someone that probably didn't check. Very easy to change.
Gerrie Donker
2025-03-04 18:28:41
OEM, thats what you want
Jeff
2024-12-31 11:09:07
Half the price of the dealership. Exactly the same part I took off my 2013 GMC Sierra 5.3l
gerald macpherson
2024-11-16 12:33:48
Did not fit 2001 gmc 6litre
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