How to Replace an Idler Pulley On a Duramax Chevrolet Truck / What a bad idler pulley sounds like.

This video shows what a bad idler pulley sounds like and gives step-by-step instructions on how to replace it in a duramax Chevrolet or GMC truck. This should also apply to LLY, LB7, LMM, LGH, LML, L5P, and LMK Duramax engines.
Link to Serpentine Belt Video: • How to replace the Ser...

[@lucaswestcomb511]

I think you just helped me find the noise I’ve been hearing in my other express van.

[@FarmDad]

Sweet. Glad this helped.

[@BigYack420]

5 years later and this just saved me a ton of trouble and diagnosed the odd noise. Bottom idler pulley . Finished in a little under an hour with some help. Thanks brother !

[@FarmDad]

Awesome. Most welcome!

[@jamesgrapp1770]

I like that 'torque specifications' - "Real tight."

[@FarmDad]

Haha 😂

[@rocklee9818]

Thanks really helped alot

[@FarmDad]

Glad to hear it!

[@ajitbeera5759]

thanks so much for that tutorial! just about to do both of mine on my 03 LB7. are both idlers exactly the same?

[@FarmDad]

Yes

[@joedurso5192]

the top one may spin free...but it's roached (noisy as F)

[@brettleasure8811]

Yea forsure

[@FarmDad]

Years later and I still haven't had to replace it so . . .

[@kardynalcommand]

@@FarmDad it's gotta be screaming loud

[@goldenranger96]

Always use a torque wrench for these don’t be lazy. Not trying to be rude but if you don’t understand why you should not be touching anything on your vehicle.

[@Maskinservice]

Really? A torque wrench for an eight mm bolt?
No, you don´t need that and you cannot even use a torque wrench there because it don´t fit. And it is so tight that you can´t over tighten the bolt unless you use a long extension tool to increase the torque.

[@Pitbull14218]

lol I think thats your AC compressor...................