GM Genuine Parts Drive Belt Tensioner
OE
Pack of 1

GM Genuine Parts Drive Belt Tensioner

GM Part #12647765

ACDelco Part #12647765

MSRP$59.42*

GM Genuine Parts Drive Belt Tensioner Assemblies are designed, engineered, and tested to rigorous standards, and are backed by General Motors.

  • Helps keep drive belt at correct tension to help maintain proper function
  • Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
  • GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors.

Pack of 1

About this product

GM Genuine Parts Drive Belt Tensioner Assemblies are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These assemblies are spring-loaded pulleys designed to draw tension on your vehicle's serpentine belt. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).

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  • Helps keep drive belt at correct tension to help maintain proper function
  • Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
  • GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors.
  • GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
  • GM regularly updates production and service part designs to integrate new materials and technologies

ColorBlack
Length4.03 in / 102.36 mm
MaterialSteel
Width2.38 in / 1.12 mm
Housing MaterialAluminum
FlangedYes
Mounting Hole Diameter0.33 in / 8.48 mm
Belt TypeSerpentine
ClassificationOE
Mounting Hole Quantity2
Pulley 1 FlangedNo
Mounting Bolt IncludedNo
Outside Diameter64.9 in / 28.36 mm
Inside Diameter60.4in
Pulley Quantity1

24 Months/Unlimited Miles Limited Warranty for Parts (plus Labor if installed by a GM dealer)

Please visit our warranty page on Gmparts.com for full warranty details.

Before purchasing and installing a drive belt tensioner assembly, make sure it is the correct size and fit for your vehicle.

  • Be sure to have the replacement tensioner properly aligned to the other drive component pulleys.
  • Have your vehicle inspected as soon as possible if the 'Service Engine Soon' light illuminates.
  • Have your vehicle inspected immediately if the 'Service Engine Soon' light flashes rapidly, as this could indicate an engine misfire condition which may damage your engine and/or engine emission components.
  • Regularly inspect assembly for signs of damage or wear, and replace them if signs of damage are found.

Signs of wear for drive belt tensioner assembly include but are not limited to:

  • Worn or cracked tensioner pulleys
  • Drive belt squeal
  • Tensioner misalignment

ModelBody StyleTrimYear(s)
LaCrosse2017, 2018, 2019
Regal SportbackGS2018, 2019, 2020

Frequently Asked Questions

Yes. If the drive belt is too tight, damage to other drive components may occur.