2021 GMC Sierra 3500 HD Idler Pulleys

Your 2021 GMC Sierra 3500 HD might be the best vehicle you’ve ever owned. Or you may just be struggling to keep it highway-approved. No matter the situation, Advance Auto Parts has the Idler Pulleys you desperately need.

We currently carry 4 Idler Pulleys to choose from for your 2021 GMC Sierra 3500 HD, and our inventory prices range from as little as $32.27 up to $50.99.

On top of low prices, Advance Auto Parts offers 3 different trusted brands of Idler Pulleys for the 2021 GMC Sierra 3500 HD. We only sell parts from trusted brands like Litens so that you can find quality parts you can count on.

Have parts delivered straight to your home, or find the nearest Advance Auto Parts store to check out our Idler Pulleys stock in-person!

Idler Pulleys for Your 2021 GMC Sierra 3500 HD

Litens – O.E Quality Idler/Tensioner Pulley: Direct Fit, Steel, 70 mm Diameter (Part No.900882A)

O.E Quality Idler/Tensioner Pulley: Direct Fit, Steel, 70 mm Diameter

from

$40.99
This pulley is manufactured by Litens Automotive the inventor of the first automatic belt tensioner in 1979 and today the world’s largest supplier of Original Equipment (O.E.) belt tensioning and routing products. This pulley is produced for serpentine belt routing applications for newer Buick 2.0L and 2.4L engine applications. This pulley conforms to original equipment material, tolerances, and specifications. The part is produced based on the O.E. specified design and meets all performance and durability requirements. Heavy duty steel construction for long life and trouble-free performance. Applications include G.M.. This pulley assembly Includes a new mounting bolt as well as a new washer/dust shield for ease of installation. Crosses to OE# 12605492 and others. Litens is the world’s largest supplier of original equipment (O.E.) power transmission products. At Litens, we design systems that are more efficient, resulting in tangible fuel economy/emissions benefits. Litens holds over 2000 patents and continues to respond to the ever-changing automotive industry by investing heavily in new technology, facilities, and people. 90% of our line is made of products coming from the OE manufacturer, which makes the Litens Tensioning Products portfolio the purest OE tensioning line in the North American aftermarket._

Product Features:
  • Manufactured by Litens, the largest original equipment tensioner and pulley supplier in the world, to ensure proper form, fit, and performance
  • Heavy Duty Steel Pulley with close tolerance ball bearing pocket and Electro-deposited coating for superior corrosion resistance.
  • Includes all mounting hardware – Bolt and large metal dust shield.
  • Pulley Assemblies save time and ensure “like new” performance
  • Running surface designed and engineered for proper belt tracking.
  • 70.0mm O.D.; 16.0mm I.D; 30.8mm smooth running surface; steel. For use with a 6- rib serpentine belt. Includes bolt, 2 dust shields, and retainer.
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Dayco – Dayco, Acc. Belt Idler Pulley (Part No.G6020926350DAY)

Dayco, Acc. Belt Idler Pulley

from

$32.27
The Dayco Accessory Belt Idler Pulley is a direct fit OEM replacement that contains the same high quality craftsmanship as the original equipment it replaces.

Product Features:
  • OE-Equivalent and a direct fit application.
  • Precision bearing
  • OE High quality pulley assembly
  • Durable long life performance.
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Dorman – Idler/Tensioner Pulley: Specific Fit, Steel, 76 mm Diameter (Part No.419-628)

Idler/Tensioner Pulley: Specific Fit, Steel, 76 mm Diameter

from

$36.49
This replacement accessory drive belt idler pulley has been engineered to match the function and performance of the original pulley on select vehicle years, makes and models, properly restoring critical vehicle operations.

Product Features:
  • Direct replacement – this accessory drive belt idler pulley matches the fit and function of the original equipment pulley on specified vehicles
  • Restores performance – fixes a failed, squealing or groaning noise from a worn idler pulley
  • Application specific – reverse engineered from the original design on certain vehicle years, makes and models
  • Trustworthy quality – backed by team of engineers and quality specialists in the United States
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Litens – O.E Quality Idler/Tensioner Pulley: Direct Fit, Steel, 90 mm Diameter (Part No.900613A)

O.E Quality Idler/Tensioner Pulley: Direct Fit, Steel, 90 mm Diameter

from

$50.99
Litens Automotive is the original equipment supplier for the 2014-Present Chevrolet Silverado 1500/GMC Sierra 1500 4.3L (Lower-Idler) This replacement pulley was made by the same OE production supplier and therefore has the same performance characteristics as the original O.E. part. This pulley is produced for serpentine belt routing applications and is made of high strength steel for improved life and durability. Includes installation bolt, dust shield and double row ball bearing for extra strength and durability. Litens is the world’s largest supplier of original equipment (O.E.) power transmission products. At Litens, we design systems that are more efficient, resulting in tangible fuel economy/emissions benefits. Litens holds over 2000 patents and continues to respond to the ever-changing automotive industry by investing heavily in new technology, facilities, and people. 90% of our line is made of products coming from the OE manufacturer, which makes the Litens Tensioning Products portfolio the purest OE tensioning line in the North American aftermarket._

Product Features:
  • Manufactured by the Original Equipment supplier.
  • Heavy Duty Steel Pulley with close tolerance two ball bearings in the pocket for extra strength anf durability. Is also has Electro-deposited coating for superior corrosion resistance.
  • Heavy duty polyacrylic seals and synthetic grease for added enhanced durability
  • Installation instructions included
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FAQs for 2021 GMC Sierra 3500 HD Idler Pulleys

What are the most popular Idler Pulleys for the 2021 GMC Sierra 3500 HD?

With 3 brands you can trust, our most popular Idler Pulleys for the 2021 GMC Sierra 3500 HD parts are:
O.E Quality Idler/Tensioner Pulley: Direct Fit, Steel, 70 mm Diameter
from $40.99
This product is not rated
O.E Quality Idler/Tensioner Pulley: Direct Fit, Steel, 70 mm Diameter
Idler Pulleys
Dayco, Acc. Belt Idler Pulley
from $32.27
This product is not rated
Dayco, Acc. Belt Idler Pulley
Idler Pulleys
Idler/Tensioner Pulley: Specific Fit, Steel, 76 mm Diameter
from $36.49
This product is not rated
Idler/Tensioner Pulley: Specific Fit, Steel, 76 mm Diameter
Idler Pulleys