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Your cart is empty.ACDelco Gold (Professional) Heavy Duty Serpentine Belts are a high quality alternative to Original Equipment (OE) parts. Serpentine belts are multi-ribbed, and used to drive multiple devices on an engine such as the alternator, the power steering pump, and the water pump. ACDelco Gold (Professional) parts are manufactured to meet your expectations for fit, form, and function, making them a smart choice for General Motors vehicles, as well as most makes and models, including special applications. These high-quality parts are backed by General Motors. Some ACDelco Gold parts may have formerly appeared as ACDelco Professional.
Customer
September 3, 2025
These belts last and are quiet. This is the 3rd one I have bought for this truck, each have lasted 80.000 miles. Never failed, just started to squeak,
Adam
August 21, 2025
Easy install, fit my 06 LBZ perfect, nice and quiet plus it’s an OEM belt
pierre balancy
August 17, 2025
Got it to solve intermittent serpentine belt squeal on startup and shutoff for my 04.5 lly Duramax. Sort of pain to install but looks awsome and got rid of noise. Measures slightly longer than oem but thats why it was squealing.. not sure about longevity yet.
michael p
August 15, 2025
This belt was the propper fit,quality good,however the cardboard sleeve and product listing said it was a delco belt.But on the belt, it saysGates belt? Well, it's on.Let's see how it lasts...
Ian Taylor
July 24, 2025
Nice belt that I've used before
Customer
July 11, 2025
I have the 2005 LLY Duramax with single alternator and this belt fits perfectly. It is about 3/8" longer then stock but the tensioner is still in spec. Looks better then stock and performs great as it is an AC-Delco stock part and not some aftermarket junk.
Customer
June 8, 2025
I replaced my original belt on my 2002 GMC 2500 HD Duramax 6.6 LB7. I can't talk about longevity yet, I've only put about 500 mile on this new belt. No stretch yet and working great. Installing this belt wasn't to bad
Kyle and Jamie
June 3, 2025
Installed on my 04.5 LLY GMC Sierra Duramax 3500 Dually.Fit great, great look. A little larger than stock belt but the tensioner takes up the slack with plenty of room.Changing the belt isn't the easiest but if you have done it before its not horrible either.Definitely would recommend
simon
April 19, 2025
Used this on my 08 duramax lmm with single alternator and its does the job so far! Can’t go wrong with Acdelco…
marc
March 2, 2025
Its a spare for my truck Delivery was fast but in all fairness it may be long time before i use it I do a lot of travelling in the bush Always have a belt and idler pulley on hand
Simon L.
December 31, 2024
Fits perfectly on my 04 2500 HD sierra .
Douglas T. Mccartney
December 30, 2024
A bit of pain to install but went along fine once I took the rock guard off.
Customer
December 23, 2024
Fit OK, but pretty thin compared to factory belt
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