Description
Warranty & Shipping
How-To & Tools
Product Reviews
Q&A
Vehicle Fit

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:

  • Direct replacement
  • Brand new not rebuilt
  • Replaces dealer part numbers: 10239670, 12456152, 89017309

To ensure fit please match the 8th digit of your VIN number to the VIN code in the title. Your vehicles VIN number can be found in the lower left corner of the windshield or on your registration.

Item Condition: New

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 : Prep (0:59)
    • Locate your belt routing diagram, usually located near the radiator. Disconnect the battery.
  2. step : Remove belt tensioner (1:13)
    • Use your 3/8ths drive ratchet handle to push down and release the tension from the belt.
    • Remove the belt.
  3. step : Remove idler pulley (1:43)
    • Use a 13mm wrench and a little pressure.
  4. step : Transfer spacer (1:54)
    • Use a small screwdriver to remove the locking washer and access the spacer.
    • Transfer the spacer onto the new idler pulley and twist the lock washer on to secure it in place.
  5. step : Put idler pulley back on. (3:14)
    • Use your 13 mm wrench to tighten it up to 20-25ft lbs
  6. step : Remove serpentine belt tensioner (3:33)
    • Use your 15 mm wrench. Remove and replace with the new tensioner.
    • Ensure that you tighten it up with your wrench.
  7. step : Inspect and replace serpentine belt (4:22)
    • Inspect the belt for breaks, cracks and imperfections.
    • Use the diagram and your wrench on the tensioner to replace the serpentine belt.
  8. step : Finish up (5:20)
    • Inspect all the pulleys and reconnect the battery.

Tools needed for replacement:

    Ratchets & Related

  • Ratchet

  • Screwdrivers & Related

  • Flat Blade Screwdriver

  • Wrenches - Metric

  • 13mm Wrench
  • 15mm Wrench

5.00/ 5.0
4 reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
4
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Fit great included new bolt.
I do not like required text reviews.with a minimum length da dadadadadadada
March 9, 2018
Worked Flawlessly
The belt tensioner arrived quickly and fit perfectly. It appears to be of better quality than the original equipment.
March 13, 2018
Belt Tensioner
Thanks now I can ride better wt my new Belt Tensioner
May 7, 2018
1A auto is the Best
Like always, my parts were exactly what I needed, the video was exceptionally helpful. and the whole process of selecting the part I needed and ordering it was as easy as could be. Thanks 1Aauto!
November 3, 2018
Will this fit my car? Add a vehicle to make sure
Customer Q&A
Ask a question to 1A Auto customers who purchased the product
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Year Make Model Description
1999-2000Cadillac Escalade Cadillac Escalade Serpentine Belt Tensioner with Pulley V8 5.7L (8th Vin Digit R)
1996-2001Chevy Astro Chevy Astro Serpentine Belt Tensioner with Pulley V6 4.3L (8th Vin Digit W)
2002-2005Chevy Astro Chevy Astro Serpentine Belt Tensioner with Pulley V6 4.3L (8th Vin Digit X)
1996-2002Chevy Blazer S10 Chevy Blazer S10 Serpentine Belt Tensioner with Pulley V6 4.3L (8th Vin Digit W)
2003-2005Chevy Blazer S10 Chevy Blazer S10 Serpentine Belt Tensioner with Pulley V6 4.3L (8th Vin Digit X)
1996-1999Chevy C1500 Truck Chevy C1500 Truck Serpentine Belt Tensioner with Pulley V6 4.3L
1996-1999Chevy C1500 Truck Chevy C1500 Truck Serpentine Belt Tensioner with Pulley V8 5.7L (8th Vin Digit R)
1996-1999Chevy C1500 Truck Chevy C1500 Truck Serpentine Belt Tensioner with Pulley V8 5.0L (8th Vin Digit M)
1996-2000Chevy C2500 Truck Chevy C2500 Truck Serpentine Belt Tensioner with Pulley V8 7.4L (8th Vin Digit J)
1996-2000Chevy C2500 Truck Chevy C2500 Truck Serpentine Belt Tensioner with Pulley V8 5.7L (8th Vin Digit R)
1996-2000Chevy C2500 Truck Chevy C2500 Truck Serpentine Belt Tensioner with Pulley V8 5.0L (8th Vin Digit M)
1996-1997Chevy C3500 Truck Chevy C3500 Truck Serpentine Belt Tensioner with Pulley V8 5.7L (8th Vin Digit K)
1996-2000Chevy C3500 Truck Chevy C3500 Truck Serpentine Belt Tensioner with Pulley V8 5.7L (8th Vin Digit R)
1996-2000Chevy C3500 Truck Chevy C3500 Truck Serpentine Belt Tensioner with Pulley V8 7.4L (8th Vin Digit J)
1996-2002Chevy Express 1500 Van Chevy Express 1500 Van Serpentine Belt Tensioner with Pulley V8 5.0L (8th Vin Digit M)
1996-2002Chevy Express 1500 Van Chevy Express 1500 Van Serpentine Belt Tensioner with Pulley (8th Vin Digit K) V8 5.7L
1996-2013Chevy Express 1500 Van Chevy Express 1500 Van Serpentine Belt Tensioner with Pulley V6 4.3L
1996-2002Chevy Express 1500 Van Chevy Express 1500 Van Serpentine Belt Tensioner with Pulley V8 5.7L (8th Vin Digit R)
1996-2002Chevy Express 2500 Van Chevy Express 2500 Van Serpentine Belt Tensioner with Pulley V8 5.0L (8th Vin Digit M)
1996-2002Chevy Express 2500 Van Chevy Express 2500 Van Serpentine Belt Tensioner with Pulley (8th Vin Digit K) V8 5.7L
1996-2002Chevy Express 2500 Van Chevy Express 2500 Van Serpentine Belt Tensioner with Pulley V8 5.7L (8th Vin Digit R)
1996-2000Chevy Express 3500 Van Chevy Express 3500 Van Serpentine Belt Tensioner with Pulley (8th Vin Digit J) V8 7.4L
1996-2002Chevy Express 3500 Van Chevy Express 3500 Van Serpentine Belt Tensioner with Pulley (8th Vin Digit K) V8 5.7L
1996-2000Chevy Express 3500 Van Chevy Express 3500 Van Serpentine Belt Tensioner with Pulley V8 7.4L (8th Vin Digit N)
1996-2002Chevy Express 3500 Van Chevy Express 3500 Van Serpentine Belt Tensioner with Pulley V8 5.7L (8th Vin Digit R)
1996-1999Chevy K1500 Truck Chevy K1500 Truck Serpentine Belt Tensioner with Pulley V6 4.3L
1996-1999Chevy K1500 Truck Chevy K1500 Truck Serpentine Belt Tensioner with Pulley V8 5.7L (8th Vin Digit R)
1996-1999Chevy K1500 Truck Chevy K1500 Truck Serpentine Belt Tensioner with Pulley V8 5.0L (8th Vin Digit M)
1996-2000Chevy K2500 Truck Chevy K2500 Truck Serpentine Belt Tensioner with Pulley V8 5.0L (8th Vin Digit M)
1996-2000Chevy K2500 Truck Chevy K2500 Truck Serpentine Belt Tensioner with Pulley V8 5.7L (8th Vin Digit R)
1996-2000Chevy K2500 Truck Chevy K2500 Truck Serpentine Belt Tensioner with Pulley V8 7.4L (8th Vin Digit J)
1996-2000Chevy K3500 Truck Chevy K3500 Truck Serpentine Belt Tensioner with Pulley V8 7.4L (8th Vin Digit J)
1996-2000Chevy K3500 Truck Chevy K3500 Truck Serpentine Belt Tensioner with Pulley V8 5.7L (8th Vin Digit R)
1996-1997Chevy K3500 Truck Chevy K3500 Truck Serpentine Belt Tensioner with Pulley V8 5.7L (8th Vin Digit K)
1996-1999Chevy P30 Chevy P30 Serpentine Belt Tensioner with Pulley V6 4.3L (8th Vin Digit W)
1996-1999Chevy P30 Chevy P30 Serpentine Belt Tensioner with Pulley V8 7.4L (8th Vin Digit B)
1996-1999Chevy P30 Chevy P30 Serpentine Belt Tensioner with Pulley V8 5.7L (8th Vin Digit R)
1996-1999Chevy P30 Chevy P30 Serpentine Belt Tensioner with Pulley V8 7.4L (8th Vin Digit N)
1996-1999Chevy P30 Chevy P30 Serpentine Belt Tensioner with Pulley V8 7.4L (8th Vin Digit J)
1996-2004Chevy S10 Pickup Chevy S10 Pickup Serpentine Belt Tensioner with Pulley V6 4.3L
1999-2013Chevy Silverado 1500 Chevy Silverado 1500 Serpentine Belt Tensioner with Pulley V6 4.3L
2007Chevy Silverado 1500 Classic Chevy Silverado 1500 Classic Serpentine Belt Tensioner with Pulley V6 4.3L
1996-1999Chevy Suburban C1500 Chevy Suburban C1500 Serpentine Belt Tensioner with Pulley V8 5.7L (8th Vin Digit R)
1996-1999Chevy Suburban C2500 Chevy Suburban C2500 Serpentine Belt Tensioner with Pulley V8 5.7L (8th Vin Digit R)
1996-1999Chevy Suburban C2500 Chevy Suburban C2500 Serpentine Belt Tensioner with Pulley (8th Vin Digit J) V8 7.4L
1996-1999Chevy Suburban K1500 Chevy Suburban K1500 Serpentine Belt Tensioner with Pulley V8 5.7L (8th Vin Digit R)
1996-1999Chevy Suburban K2500 Chevy Suburban K2500 Serpentine Belt Tensioner with Pulley V8 5.7L (8th Vin Digit R)
1996-1999Chevy Suburban K2500 Chevy Suburban K2500 Serpentine Belt Tensioner with Pulley (8th Vin Digit J) V8 7.4L
1996-2000Chevy Tahoe Chevy Tahoe Serpentine Belt Tensioner with Pulley V8 5.7L (8th Vin Digit R)
1996-1999GMC C1500 Truck GMC C1500 Truck Serpentine Belt Tensioner with Pulley V6 4.3L
1996-1999GMC C1500 Truck GMC C1500 Truck Serpentine Belt Tensioner with Pulley V8 5.7L (8th Vin Digit R)
1996-1999GMC C1500 Truck GMC C1500 Truck Serpentine Belt Tensioner with Pulley V8 7.4L (8th Vin Digit J)
1996-1999GMC C1500 Truck GMC C1500 Truck Serpentine Belt Tensioner with Pulley V8 5.0L (8th Vin Digit M)
1996-2000GMC C2500 Truck GMC C2500 Truck Serpentine Belt Tensioner with Pulley V8 5.7L (8th Vin Digit R)
1996-2000GMC C2500 Truck GMC C2500 Truck Serpentine Belt Tensioner with Pulley V8 5.0L (8th Vin Digit M)
1996-2000GMC C2500 Truck GMC C2500 Truck Serpentine Belt Tensioner with Pulley V8 7.4L (8th Vin Digit J)
1996-2000GMC C3500 Truck GMC C3500 Truck Serpentine Belt Tensioner with Pulley V8 5.7L (8th Vin Digit R)
1996-2000GMC C3500 Truck GMC C3500 Truck Serpentine Belt Tensioner with Pulley V8 7.4L (8th Vin Digit J)
1996GMC G3500 GMC G3500 Serpentine Belt Tensioner with Pulley V8 7.4L (8th Vin Digit J)
1996GMC G3500 GMC G3500 Serpentine Belt Tensioner with Pulley V8 5.0L (8th Vin Digit M)
1996GMC G3500 GMC G3500 Serpentine Belt Tensioner with Pulley V8 5.7L (8th Vin Digit K)
1996GMC G3500 GMC G3500 Serpentine Belt Tensioner with Pulley V6 4.3L
1996GMC G3500 GMC G3500 Serpentine Belt Tensioner with Pulley V8 5.7L (8th Vin Digit R)
1996GMC G3500 GMC G3500 Serpentine Belt Tensioner with Pulley V8 7.4L (8th Vin Digit N)
1996-2001GMC Jimmy S-15 GMC Jimmy S-15 Serpentine Belt Tensioner with Pulley V6 4.3L (8th Vin Digit W)
1996-1999GMC K1500 Truck GMC K1500 Truck Serpentine Belt Tensioner with Pulley V6 4.3L
1996-1999GMC K1500 Truck GMC K1500 Truck Serpentine Belt Tensioner with Pulley V8 5.7L (8th Vin Digit R)
1996-1999GMC K1500 Truck GMC K1500 Truck Serpentine Belt Tensioner with Pulley V8 5.0L (8th Vin Digit M)
1996-2000GMC K2500 Truck GMC K2500 Truck Serpentine Belt Tensioner with Pulley V8 5.7L (8th Vin Digit R)
1996-2000GMC K2500 Truck GMC K2500 Truck Serpentine Belt Tensioner with Pulley V8 7.4L (8th Vin Digit J)
1996-2000GMC K2500 Truck GMC K2500 Truck Serpentine Belt Tensioner with Pulley V8 5.0L (8th Vin Digit M)
1996-2000GMC K3500 Truck GMC K3500 Truck Serpentine Belt Tensioner with Pulley V8 5.7L (8th Vin Digit R)
1996-2000GMC K3500 Truck GMC K3500 Truck Serpentine Belt Tensioner with Pulley V8 7.4L (8th Vin Digit J)
1996-1999GMC P3500 GMC P3500 Serpentine Belt Tensioner with Pulley V8 7.4L (8th Vin Digit N)
1996-1999GMC P3500 GMC P3500 Serpentine Belt Tensioner with Pulley V8 7.4L (8th Vin Digit J)
1996-1999GMC P3500 GMC P3500 Serpentine Belt Tensioner with Pulley V6 4.3L (8th Vin Digit W)
1996-1999GMC P3500 GMC P3500 Serpentine Belt Tensioner with Pulley V8 7.4L (8th Vin Digit B)
1996-1999GMC P3500 GMC P3500 Serpentine Belt Tensioner with Pulley V8 5.7L (8th Vin Digit R)
1996-2004GMC S-15 Sonoma GMC S-15 Sonoma Serpentine Belt Tensioner with Pulley V6 4.3L
1996-2001GMC Safari GMC Safari Serpentine Belt Tensioner with Pulley V6 4.3L (8th Vin Digit W)
2002-2005GMC Safari GMC Safari Serpentine Belt Tensioner with Pulley V6 4.3L (8th Vin Digit X)
1996-2002GMC Savana 1500 Van GMC Savana 1500 Van Serpentine Belt Tensioner with Pulley V8 5.0L (8th Vin Digit M)
1996-2002GMC Savana 1500 Van GMC Savana 1500 Van Serpentine Belt Tensioner with Pulley (8th Vin Digit K) V8 5.7L
1996-2013GMC Savana 1500 Van GMC Savana 1500 Van Serpentine Belt Tensioner with Pulley V6 4.3L
1996-2002GMC Savana 1500 Van GMC Savana 1500 Van Serpentine Belt Tensioner with Pulley V8 5.7L (8th Vin Digit R)
1996-2005GMC Savana 2500 Van GMC Savana 2500 Van Serpentine Belt Tensioner with Pulley V6 4.3L
1996-2002GMC Savana 2500 Van GMC Savana 2500 Van Serpentine Belt Tensioner with Pulley V8 5.0L (8th Vin Digit M)
1996-2002GMC Savana 2500 Van GMC Savana 2500 Van Serpentine Belt Tensioner with Pulley (8th Vin Digit K) V8 5.7L
1996-2002GMC Savana 2500 Van GMC Savana 2500 Van Serpentine Belt Tensioner with Pulley V8 5.7L (8th Vin Digit R)
1996-2000GMC Savana 3500 Van GMC Savana 3500 Van Serpentine Belt Tensioner with Pulley (8th Vin Digit J) V8 7.4L
1996-2002GMC Savana 3500 Van GMC Savana 3500 Van Serpentine Belt Tensioner with Pulley (8th Vin Digit K) V8 5.7L
1996-2002GMC Savana 3500 Van GMC Savana 3500 Van Serpentine Belt Tensioner with Pulley V8 5.7L (8th Vin Digit R)
1996-2000GMC Savana 3500 Van GMC Savana 3500 Van Serpentine Belt Tensioner with Pulley V8 7.4L (8th Vin Digit N)
1999-2013GMC Sierra 1500 GMC Sierra 1500 Serpentine Belt Tensioner with Pulley V6 4.3L
2007GMC Sierra 1500 Classic GMC Sierra 1500 Classic Serpentine Belt Tensioner with Pulley V6 4.3L
1996-1999GMC Suburban C1500 GMC Suburban C1500 Serpentine Belt Tensioner with Pulley V8 5.7L (8th Vin Digit R)
1996-1999GMC Suburban C2500 GMC Suburban C2500 Serpentine Belt Tensioner with Pulley V8 5.7L (8th Vin Digit R)
1996-1999GMC Suburban C2500 GMC Suburban C2500 Serpentine Belt Tensioner with Pulley (8th Vin Digit J) V8 7.4L
1996-1999GMC Suburban K1500 GMC Suburban K1500 Serpentine Belt Tensioner with Pulley V8 5.7L (8th Vin Digit R)
1996-1999GMC Suburban K2500 GMC Suburban K2500 Serpentine Belt Tensioner with Pulley V8 5.7L (8th Vin Digit R)
1996-1999GMC Suburban K2500 GMC Suburban K2500 Serpentine Belt Tensioner with Pulley (8th Vin Digit J) V8 7.4L
1996-2000GMC Yukon GMC Yukon Serpentine Belt Tensioner with Pulley V8 5.7L (8th Vin Digit R)
1997-2000Isuzu Hombre Isuzu Hombre Serpentine Belt Tensioner with Pulley V6 4.3L (8th Vin Digit X)
1996-2001Oldsmobile Bravada Olds Bravada Serpentine Belt Tensioner with Pulley V6 4.3L (8th Vin Digit W)
Part #: 1AEBT00001


Order must be placed by 4pm ET

Get it in: 2 - 4 Business Days

Want it sooner? Choose Next Day Air at Checkout

How-to Video:

(05:50 min)