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Gates 38783 Accessory Drive Belt Tensioner Assembly - AlternatorOE Quality 60-Day Returns
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Part #: 38783

Gates 38783 Accessory Drive Belt Tensioner Assembly - Alternator

DriveAlign Premium OE Automatic Belt Tensioner, Alternator
⚙️ 36 vehicles fit this part
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Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$65.25Free Shipping
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✅ In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
✅OE Direct Replacement — Bolt-on fit, no modifications needed
📦DriveAlign Premium OE Automatic Belt Tensioner, Alternator
🚗Fitment: Chevrolet and GMC, Sierra 2500 HD, Sierra 3500 HD, Silverado 2500 HD, and Silverado 3500 HD
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Gates 38783 Accessory Drive Belt Tensioner Assembly - Alternator
BrandGates
Part Number38783
PositionDriveAlign Premium OE Automatic Belt Tensioner, Alternator
MaterialThermoplastic
Pulley 1 FlangedYes
Bearing Bore Inside Diameter.67
Bearing Bore Inside Diameter17
Grade TypeOe performance
Mounting Hole Quantity1
Belt TypeV-ribbed
Pulley Quantity1
9836V-ribbed grooved
ContentsTensioner assy.
Outside Diameter 1 (in)2.8
Outside Diameter 1 (mm)71
Pulley 1 Groove Quantity6
Width 1 (in)1
Width 1 (mm)25

This part fits 36 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
2025ChevroletSilverado 2500 HD6.6LV8DIESELAlternatorDriveAlign Premium OE Automatic Belt Tensioner
2025ChevroletSilverado 3500 HD6.6LV8DIESELAlternatorDriveAlign Premium OE Automatic Belt Tensioner
2025GMCSierra 2500 HD6.6LV8DIESELAlternatorDriveAlign Premium OE Automatic Belt Tensioner
2025GMCSierra 3500 HD6.6LV8DIESELAlternatorDriveAlign Premium OE Automatic Belt Tensioner
2024ChevroletSilverado 2500 HD6.6LV8DIESELAlternatorDriveAlign Premium OE Automatic Belt Tensioner
2024ChevroletSilverado 3500 HD6.6LV8DIESELAlternatorDriveAlign Premium OE Automatic Belt Tensioner
2024GMCSierra 2500 HD6.6LV8DIESELAlternatorDriveAlign Premium OE Automatic Belt Tensioner
2024GMCSierra 3500 HD6.6LV8DIESELAlternatorDriveAlign Premium OE Automatic Belt Tensioner
2023ChevroletSilverado 2500 HD6.6LV8DIESELAlternatorDriveAlign Premium OE Automatic Belt Tensioner
2023ChevroletSilverado 3500 HD6.6LV8DIESELAlternatorDriveAlign Premium OE Automatic Belt Tensioner
2023GMCSierra 2500 HD6.6LV8DIESELAlternatorDriveAlign Premium OE Automatic Belt Tensioner
2023GMCSierra 3500 HD6.6LV8DIESELAlternatorDriveAlign Premium OE Automatic Belt Tensioner
2022ChevroletSilverado 2500 HD6.6LV8DIESELAlternatorDriveAlign Premium OE Automatic Belt Tensioner
2022ChevroletSilverado 3500 HD6.6LV8DIESELAlternatorDriveAlign Premium OE Automatic Belt Tensioner
2022GMCSierra 2500 HD6.6LV8DIESELAlternatorDriveAlign Premium OE Automatic Belt Tensioner
2022GMCSierra 3500 HD6.6LV8DIESELAlternatorDriveAlign Premium OE Automatic Belt Tensioner
2021ChevroletSilverado 2500 HD6.6LV8DIESELAlternatorDriveAlign Premium OE Automatic Belt Tensioner
2021ChevroletSilverado 3500 HD6.6LV8DIESELAlternatorDriveAlign Premium OE Automatic Belt Tensioner
2021GMCSierra 2500 HD6.6LV8DIESELAlternatorDriveAlign Premium OE Automatic Belt Tensioner
2021GMCSierra 3500 HD6.6LV8DIESELAlternatorDriveAlign Premium OE Automatic Belt Tensioner
2020ChevroletSilverado 2500 HD6.6LV8DIESELAlternatorDriveAlign Premium OE Automatic Belt Tensioner
2020ChevroletSilverado 3500 HD6.6LV8DIESELAlternatorDriveAlign Premium OE Automatic Belt Tensioner
2020GMCSierra 2500 HD6.6LV8DIESELAlternatorDriveAlign Premium OE Automatic Belt Tensioner
2020GMCSierra 3500 HD6.6LV8DIESELAlternatorDriveAlign Premium OE Automatic Belt Tensioner
2019ChevroletSilverado 2500 HD6.6LV8DIESELN/ADriveAlign Premium OE Automatic Belt Tensioner
2019ChevroletSilverado 3500 HD6.6LV8DIESELN/ADriveAlign Premium OE Automatic Belt Tensioner
2019GMCSierra 2500 HD6.6LV8DIESELN/ADriveAlign Premium OE Automatic Belt Tensioner
2019GMCSierra 3500 HD6.6LV8DIESELN/ADriveAlign Premium OE Automatic Belt Tensioner
2018ChevroletSilverado 2500 HD6.6LV8DIESELN/ADriveAlign Premium OE Automatic Belt Tensioner
2018ChevroletSilverado 3500 HD6.6LV8DIESELN/ADriveAlign Premium OE Automatic Belt Tensioner
2018GMCSierra 2500 HD6.6LV8DIESELN/ADriveAlign Premium OE Automatic Belt Tensioner
2018GMCSierra 3500 HD6.6LV8DIESELN/ADriveAlign Premium OE Automatic Belt Tensioner
2017ChevroletSilverado 2500 HD6.6LV8DIESELN/ADriveAlign Premium OE Automatic Belt Tensioner
2017ChevroletSilverado 3500 HD6.6LV8DIESELN/ADriveAlign Premium OE Automatic Belt Tensioner
2017GMCSierra 2500 HD6.6LV8DIESELN/ADriveAlign Premium OE Automatic Belt Tensioner
2017GMCSierra 3500 HD6.6LV8DIESELN/ADriveAlign Premium OE Automatic Belt Tensioner

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

1267365738783

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.

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