Duramax L5P Metal Belt Tensioner Pulley Upgrade 2017-2024 ! John C Garage

Here at John C Garage, we like to solve problems! Not only do we solve problems, but we make them better than factory.

On 2017-2024 Duramax L5P Diesel (Silverado/Sierra 2500/3500HD), we have seen time and time again the plastic pulley on the main belt tensioner fails, leaving the truck inoperable! (See 2nd photo for example) We have come up with a metal steel pulley that directly replaces the plastic pulley that is prone for failure! Even if you haven't experienced this failure yet, this is something you should throw in the glovebox or under your back seat for when it comes time to replace! It's also not a bad idea to change preventatively because when your factory plastic pulley does fail, it can take out the clutch fan wiring with it which can be a much bigger issue than a simple pulley/belt change or being stuck on the side of the road.

We understand this item can be time sensitive, so we have stocked up on these components and have all available options in stock! They can be expedited as there are various shipping methods during checkout to choose from.

We sell this with several options which are explained below.

Metal Steel pulley by itself which comes with a new bearing already pressed in and ready for installation onto your existing tensioner. 

Metal Steel pulley with a brand-new AC Delco belt tensioner which we install prior to shipping out. (Recommended for higher mileage trucks)

Option 2 making it a complete package when paired with a new belt tensioner:

Brand new AC Delco serpentine belt,

2020-2025 year range (single and dual alternator)

2017-2019 year range (single and dual alternator)

(Also recommended for higher mileage trucks)

If you own a 2020+ Duramax L5P, we sell the secondary upgraded metal pulley and belt combo HERE

L5P Metal Pulley

L5P Metal Belt Tensioner Pulley

Duramax L5P Belt Tensioner Pulley Upgrade

L5P Belt Tensioner