Replaces

Serpentine Belt Tensioner with Pulley Dorman 419-125 - 1AEBT00060

DORMAN PRODUCTS BELT TENSIONER ASSEMBLY: 419-125

This replacement serpentine belt tensioner is just what you need to get your vehicle in good working order again! If you are hearing a whirring noise from the front of your engine or if your belt often screeches you may be in need of a new belt tensioner. This part commonly wears out between 60,000 and 70,000 Miles. If it fails suddenly it can leave you stranded.

Specifications:

  • Brand New Dorman Serpentine Belt Tensioner
  • Includes pulley
  • Replaces dealer part number: 12573024, 24576885, 8125730240
  • Direct replacement
  • Built to strict quality control standards

This tensioner makes a great replacement and has good cost savings over a dealer unit.

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.

Lifetime Warranty

This item is backed by a Limited Lifetime Warranty. In the event this item should fail due to manufacturing defects during intended use, we will exchange the part free of charge (excludes shipping charges) for the original purchaser.

  1. step : Removing the Serpentine Belt (0:54)
    • Familiarize yourself with the serpentine belt route
    • Use the 3/8 inch drive ratchet to turn the tensioner clockwise
    • Loosen the setpentine belt
    • Remove the belt
  2. step : Removing the Belt Tensioner (3:00)
    • Remove the 15mm bolt from the tensioner
    • Remove the tensioner
  3. step : Replacing the Tensioner (3:51)
    • If necessary, remove the 13mm bolt from the pulley bearing and replace the pulley
    • Slide the tensioner bolt into place
    • Push the tensioner toward the engine
    • Push the locating bolt into place
    • Tighten the bolt by hand
    • Tighten the bolt to between 35 – 40 foot-pounds
  4. step : Reinstalling the Serpentine Belt (5:15)
    • Inspect the belt for wear
    • Replace the belt with a new one if necessary
    • Start the belt at the crank pulley
    • Bring it over the water pump
    • Bring it around the A/C pulley
    • Bring it around the idler pulley
    • Bring it around the tensioner pulley
    • Bring it around the power steering pulley
    • With the 3/8 inch drive ratchet and a breaker bar or pipe for leverage pull the tensioner over
    • Putt the belt around the alternator
    • Release the tensioner
    • Check that the belt is routed correctly

Tools needed for replacement:

    Ratchets & Related

  • Ratchet
  • 3/8 Inch Drive Ratchet
  • A Piece of Pipe (for leverage)
  • 1/2 Inch Breaker Bar

  • Sockets - Metric

  • 15mm Socket

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Vehicle Fit

Year Make Model Description
2004-2007Buick Rainier Buick Rainier Serpentine Belt Tensioner with Pulley L6 4.2L Dorman 419-125
2004-2008Chevy Colorado Chevy Colorado Serpentine Belt Tensioner with Pulley Dorman 419-125
2009-2012Chevy Colorado Chevy Colorado Serpentine Belt Tensioner with Pulley L5 3.5L Dorman 419-125
2009-2012Chevy Colorado Chevy Colorado Serpentine Belt Tensioner with Pulley L4 2.9L Dorman 419-125
2002-2009Chevy Trailblazer Chevy Trailblazer Serpentine Belt Tensioner with Pulley L6 4.2L Dorman 419-125
2004-2008GMC Canyon GMC Canyon Serpentine Belt Tensioner with Pulley Dorman 419-125
2009-2012GMC Canyon GMC Canyon Serpentine Belt Tensioner with Pulley L4 2.9L Dorman 419-125
2009-2012GMC Canyon GMC Canyon Serpentine Belt Tensioner with Pulley L5 3.5L Dorman 419-125
2002-2009GMC Envoy GMC Envoy Serpentine Belt Tensioner with Pulley L6 4.2L Dorman 419-125
2006-2007Hummer H3 Hummer H3 Serpentine Belt Tensioner with Pulley Dorman 419-125
2008-2010Hummer H3 Hummer H3 Serpentine Belt Tensioner with Pulley L5 3.7L Dorman 419-125
2009-2010Hummer H3T Hummer H3T Serpentine Belt Tensioner with Pulley L5 3.7L Dorman 419-125
2003-2008Isuzu Ascender Isuzu Ascender Serpentine Belt Tensioner with Pulley L6 4.2L Dorman 419-125
2006Isuzu i-280 Isuzu i-280 Serpentine Belt Tensioner with Pulley Dorman 419-125
2007-2008Isuzu i-290 Isuzu i-290 Serpentine Belt Tensioner with Pulley Dorman 419-125
2006Isuzu i-350 Isuzu i-350 Serpentine Belt Tensioner with Pulley Dorman 419-125
2007-2008Isuzu i-370 Isuzu i-370 Serpentine Belt Tensioner with Pulley Dorman 419-125
2002-2004Oldsmobile Bravada Olds Bravada Serpentine Belt Tensioner with Pulley Dorman 419-125
2005-2009Saab 9-7X Saab 9-7X Serpentine Belt Tensioner with Pulley L6 4.2L Dorman 419-125

This part replaces:

  • Dorman 419-125
  • OE # 12573024
Part #: 1AEBT00060

Out of Stock

Dorman
Brand #: 419-125

How-to Video:

(08:08 min)