Replaces

Serpentine Belt Tensioner

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

Part Details

  • Includes:   Pulley
  • Also Used For:   LS Swap

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:

  • Replaces one of many dealer part numbers including: 12580162, 8-12580-162-0, 8125801620
  • Brand new, not rebuilt or remanufactured
  • Bolts to front of engine
  • Built to strict quality control standards
  • Direct replacement for the following engines as listed:
    • V8 4.8L (8th Vin Digit C or V)
    • V8 5.3L (8th Vin Digit 0, 3, B, J, M, P, T, or Z)
    • V8 6.0L (8th Vin Digit H, K, N, U, or Y)
    • V8 6.2L (8th Vin Digit 8)

Note: For the models that use two serpentine belts, this tensioner is for the belt that drives the water pump, not the A/C system. The water pump belt is the wider of the two belts. Also the water pump tensioner uses a ribbed pulley where the A/C tensioner uses a smooth pulley,

ALSO: 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

Attention California Customers:

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

Lifetime Warranty

This item is backed by our limited lifetime warranty. In the event this item should fail due to manufacturing defects during intended use, we will replace the part free of charge.

  1. step : Remove the intake hose (1:10)
    • Use your screwdriver to pry back the clip and break the seal on the intake hose.
    • Move it out of the way and set aside.
  2. step : Remove the serpentine belt (1:50)
    • Use your 15 mm socket and ratchet to release the tension from the belt tensioner pulley
    • Pull the serpentine belt off the engine.
  3. step : Remove and install the new serpentine belt tensioner. (2:35)
    • Check your pulleys for play, squeaking, rattling, or grinding sounds.
    • Unbolt the 15 mm bolts anchoring the tensioner pulley.
    • Replace with the new pulley from 1A Auto and bolt into place.
    • Torque to 330-35 ft lbs.
    • Use your serpentine belt diagram and the 15 mm socket and ratchet to thread the serpentine belt onto the pulleys, releasing the tension from the tensioner pulley to get the belt over the last pulley.

Tools needed for replacement:

    Ratchets & Related

  • Ratchet
  • Socket Extensions

  • Screwdrivers & Related

  • Flat Blade Screwdriver
  • Phillips Head Screwdriver

  • Sockets - Metric

  • 15mm Socket

5.00/ 5.0
3 reviews
5 Stars
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The right part, perfect fit for my 2001 Chevy Tahoe. I always replace the belt tensioner every other belt replacement.
October 16, 2013
Good pricing with fast ship
The belt tensioner with pulley was a perfect fit with little effort to install on my 2003 Silverado 2500HD with approx. 75000 miles. All that was needed was a 15mm wrench and straight-bladed screwdriver and about a half hour of labor. Installed new serpentine belts at same time. This new tensioner remedied the bearing noise of existing OEM one. Would recommend this product. Also A1 auto has great HOW TO videos.
December 24, 2017
Easy replacement, fast service, great videos
The title says it all. The replacement was an exact fit. It was easily accessible as the video explained. The part arrived in a couple of days. Much easier than checking the local parts stores and having to wait for a delivery from a distant big warehouse. Always good to work with a reliable company.
September 23, 2019
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Fits the following Makes:

Year Make Model Description
2004Buick Rainier Buick Rainier V8 5.3L (8th Vin Digit P) Water Pump Belt Serpentine Belt Tensioner
2005-2006Buick Rainier Buick Rainier V8 5.3L (8th Vin Digit M) Water Pump Belt Serpentine Belt Tensioner
2002-2005Cadillac Escalade Cadillac Escalade V8 5.3L (8th Vin Digit T) Water Pump Belt Serpentine Belt Tensioner
2002-2006Cadillac Escalade Cadillac Escalade V8 6.0L (8th Vin Digit N) Water Pump Belt Serpentine Belt Tensioner
2007Cadillac Escalade Cadillac Escalade V8 6.2L (8th Vin Digit 8) Water Pump Belt Serpentine Belt Tensioner
2003-2006Cadillac Escalade ESV Cadillac Escalade ESV V8 6.0L (8th Vin Digit N) Water Pump Belt Serpentine Belt Tensioner
2007Cadillac Escalade ESV Cadillac Escalade ESV V8 6.2L (8th Vin Digit 8) Water Pump Belt Serpentine Belt Tensioner
2002-2006Cadillac Escalade EXT Cadillac Escalade EXT V8 6.0L (8th Vin Digit N) Water Pump Belt Serpentine Belt Tensioner
2007Cadillac Escalade EXT Cadillac Escalade EXT V8 6.2L (8th Vin Digit 8) Water Pump Belt Serpentine Belt Tensioner
2007Chevy Avalanche Chevy Avalanche V8 5.3L (8th Vin Digit 0, 3, or J) Water Pump Belt Serpentine Belt Tensioner
2003-2007Chevy Express 1500 Van Chevy Express 1500 Van V8 5.3L (8th Vin Digit T or U) Water Pump Belt Serpentine Belt Tensioner
2007Chevy Express 1500 Van Chevy Express 1500 Van V8 5.3L (8th Vin Digit Z) Water Pump Belt Serpentine Belt Tensioner
2003-2007Chevy Express 2500 Van Chevy Express 2500 Van V8 5.3L (8th Vin Digit T or U) Water Pump Belt Serpentine Belt Tensioner
2003-2007Chevy Express 2500 Van Chevy Express 2500 Van V8 4.8L (8th Vin Digit V) Water Pump Belt Serpentine Belt Tensioner
2007Chevy Express 2500 Van Chevy Express 2500 Van V8 5.3L (8th Vin Digit Z) Water Pump Belt Serpentine Belt Tensioner
2003-2007Chevy Express 3500 Van Chevy Express 3500 Van V8 4.8L (8th Vin Digit V) Water Pump Belt Serpentine Belt Tensioner
2003Chevy SSR Chevy SSR V8 5.3L (8th Vin Digit P) Water Pump Belt Serpentine Belt Tensioner
2004Chevy SSR Chevy SSR V8 5.3L (8th Vin Digit N) Water Pump Belt Serpentine Belt Tensioner
2005-2006Chevy SSR Chevy SSR V8 6.0L (8th Vin Digit H) Water Pump Belt Serpentine Belt Tensioner
1999-2007Chevy Silverado 1500 Chevy Silverado 1500 V8 4.8L (8th Vin Digit V) Water Pump Belt Serpentine Belt Tensioner
1999-2007Chevy Silverado 1500 Chevy Silverado 1500 V8 5.3L (8th Vin Digit T) Water Pump Belt Serpentine Belt Tensioner
1999-2007Chevy Silverado 1500 Chevy Silverado 1500 V8 6.0L (8th Vin Digit U) Serpentine Belt Tensioner
2002-2007Chevy Silverado 1500 Chevy Silverado 1500 V8 5.3L (8th Vin Digit Z) Water Pump Belt Serpentine Belt Tensioner
2003-2006Chevy Silverado 1500 Chevy Silverado 1500 V8 6.0L (8th Vin Digit N) Water Pump Belt Serpentine Belt Tensioner
2005-2006Chevy Silverado 1500 Chevy Silverado 1500 V8 5.3L (8th Vin Digit B) Serpentine Belt Tensioner
2007Chevy Silverado 1500 Classic Chevy Silverado 1500 Classic V8 4.8L (8th Vin Digit V) Water Pump Belt Serpentine Belt Tensioner
2007Chevy Silverado 1500 Classic Chevy Silverado 1500 Classic V8 5.3L (8th Vin Digit 0, 3, J, or M) Water Pump Belt Serpentine Belt Tensioner
2007Chevy Silverado 1500 Classic Chevy Silverado 1500 Classic V8 5.3L (8th Vin Digit T) Water Pump Belt Serpentine Belt Tensioner
2007Chevy Silverado 1500 Classic Chevy Silverado 1500 Classic V8 5.3L (8th Vin Digit Z) Water Pump Belt Serpentine Belt Tensioner
2007Chevy Silverado 1500 Classic Chevy Silverado 1500 Classic V8 6.0L (8th Vin Digit U) Serpentine Belt Tensioner
2007Chevy Silverado 1500 Classic Chevy Silverado 1500 Classic V8 4.8L (8th Vin Digit C) Serpentine Belt Tensioner
2007Chevy Silverado 1500 Classic Chevy Silverado 1500 Classic V8 5.3L (8th Vin Digit B) Serpentine Belt Tensioner
2001-2003Chevy Silverado 1500 HD Chevy Silverado 1500 HD Serpentine Belt Tensioner
2005-2006Chevy Silverado 1500 HD Chevy Silverado 1500 HD Serpentine Belt Tensioner
1999-2000Chevy Silverado 2500 Chevy Silverado 2500 V8 5.3L (8th Vin Digit T) Water Pump Belt Serpentine Belt Tensioner
1999-2004Chevy Silverado 2500 Chevy Silverado 2500 V8 6.0L (8th Vin Digit U) Serpentine Belt Tensioner
2002-2004Chevy Silverado 2500 Chevy Silverado 2500 V8 5.3L (8th Vin Digit Z) Water Pump Belt Serpentine Belt Tensioner
2003-2004Chevy Silverado 2500 Chevy Silverado 2500 V8 6.0L (8th Vin Digit N) Water Pump Belt Serpentine Belt Tensioner
2003-2006Chevy Silverado 2500 HD Chevy Silverado 2500 HD V8 6.0L (8th Vin Digit N) Water Pump Belt Serpentine Belt Tensioner
2001-2006Chevy Silverado 3500 Chevy Silverado 3500 V8 6.0L (8th Vin Digit U) Water Pump Belt Serpentine Belt Tensioner
2003-2006Chevy Silverado 3500 Chevy Silverado 3500 V8 6.0L (8th Vin Digit N) Water Pump Belt Serpentine Belt Tensioner
2007Chevy Silverado 3500 Classic Chevy Silverado 3500 Classic V8 6.0L (8th Vin Digit K) Water Pump Belt Serpentine Belt Tensioner
2007Chevy Silverado 3500 Classic Chevy Silverado 3500 Classic V8 6.0L (8th Vin Digit U) Water Pump Belt Serpentine Belt Tensioner
2000-2005Chevy Suburban 1500 Chevy Suburban 1500 V8 5.3L (8th Vin Digit T) Water Pump Belt Serpentine Belt Tensioner
2002-2006Chevy Suburban 1500 Chevy Suburban 1500 V8 5.3L (8th Vin Digit Z) Water Pump Belt Serpentine Belt Tensioner
2007Chevy Suburban 1500 Chevy Suburban 1500 V8 5.3L (8th Vin Digit 0, 3, or J) Water Pump Belt Serpentine Belt Tensioner
2007Chevy Suburban 2500 Chevy Suburban 2500 Serpentine Belt Tensioner
2000-2006Chevy Tahoe Chevy Tahoe V8 4.8L (8th Vin Digit V) Water Pump Belt Serpentine Belt Tensioner
2000-2006Chevy Tahoe Chevy Tahoe V8 5.3L (8th Vin Digit T) Water Pump Belt Serpentine Belt Tensioner
2002-2006Chevy Tahoe Chevy Tahoe V8 5.3L (8th Vin Digit Z) Water Pump Belt Serpentine Belt Tensioner
2007Chevy Tahoe Chevy Tahoe V8 4.8L (8th Vin Digit C) Water Pump Belt Serpentine Belt Tensioner
2007Chevy Tahoe Chevy Tahoe V8 5.3L (8th Vin Digit 0 or J) Water Pump Belt Serpentine Belt Tensioner
2006Chevy Trailblazer Chevy Trailblazer V8 5.3L (8th Vin Digit M) Water Pump Belt Serpentine Belt Tensioner
2006Chevy Trailblazer Chevy Trailblazer V8 6.0L (8th Vin Digit H) Water Pump Belt Serpentine Belt Tensioner
2003-2004Chevy Trailblazer EXT Chevy Trailblazer EXT V8 5.3L (8th Vin Digit P) Water Pump Belt Serpentine Belt Tensioner
2005-2006Chevy Trailblazer EXT Chevy Trailblazer EXT V8 5.3L (8th Vin Digit M) Water Pump Belt Serpentine Belt Tensioner
2005-2006GMC Envoy GMC Envoy V8 5.3L (8th Vin Digit M) Water Pump Belt Serpentine Belt Tensioner
2003-2004GMC Envoy XL GMC Envoy XL V8 5.3L (8th Vin Digit P) Water Pump Belt Serpentine Belt Tensioner
2005-2006GMC Envoy XL GMC Envoy XL V8 5.3L (8th Vin Digit M) Water Pump Belt Serpentine Belt Tensioner
2004GMC Envoy XUV GMC Envoy XUV V8 5.3L (8th Vin Digit P) Water Pump Belt Serpentine Belt Tensioner
2005GMC Envoy XUV GMC Envoy XUV V8 5.3L (8th Vin Digit M) Water Pump Belt Serpentine Belt Tensioner
2003-2007GMC Savana 1500 Van GMC Savana 1500 Van V8 5.3L (8th Vin Digit T) Water Pump Belt Serpentine Belt Tensioner
2007GMC Savana 1500 Van GMC Savana 1500 Van V8 5.3L (8th Vin Digit Z) Water Pump Belt Serpentine Belt Tensioner
2003-2007GMC Savana 2500 Van GMC Savana 2500 Van V8 4.8L (8th Vin Digit V) Water Pump Belt Serpentine Belt Tensioner
2003-2007GMC Savana 2500 Van GMC Savana 2500 Van V8 5.3L (8th Vin Digit T) Water Pump Belt Serpentine Belt Tensioner
2007GMC Savana 2500 Van GMC Savana 2500 Van V8 5.3L (8th Vin Digit Z) Water Pump Belt Serpentine Belt Tensioner
2003-2007GMC Savana 3500 Van GMC Savana 3500 Van V8 4.8L (8th Vin Digit V) Water Pump Belt Serpentine Belt Tensioner
1999-2006GMC Sierra 1500 GMC Sierra 1500 V8 4.8L (8th Vin Digit V) Water Pump Belt Serpentine Belt Tensioner
1999-2006GMC Sierra 1500 GMC Sierra 1500 V8 5.3L (8th Vin Digit T) Water Pump Belt Serpentine Belt Tensioner
2002-2006GMC Sierra 1500 GMC Sierra 1500 V8 5.3L (8th Vin Digit Z) Water Pump Belt Serpentine Belt Tensioner
2005-2006GMC Sierra 1500 GMC Sierra 1500 V8 6.0L (8th Vin Digit N) Water Pump Belt Serpentine Belt Tensioner
2007GMC Sierra 1500 Classic GMC Sierra 1500 Classic V8 5.3L (8th Vin Digit T) Water Pump Belt Serpentine Belt Tensioner
2007GMC Sierra 1500 Classic GMC Sierra 1500 Classic V8 4.8L (8th Vin Digit V) Water Pump Belt Serpentine Belt Tensioner
2007GMC Sierra 1500 Classic GMC Sierra 1500 Classic V8 6.0L (8th Vin Digit N) Water Pump Belt Serpentine Belt Tensioner
2007GMC Sierra 1500 Classic GMC Sierra 1500 Classic V8 5.3L (8th Vin Digit 0, 3, J, or M) Water Pump Belt Serpentine Belt Tensioner
2007GMC Sierra 1500 Classic GMC Sierra 1500 Classic V8 5.3L (8th Vin Digit Z) Water Pump Belt Serpentine Belt Tensioner
2007GMC Sierra 1500 Classic GMC Sierra 1500 Classic V8 4.8L (8th Vin Digit C) Water Pump Belt Serpentine Belt Tensioner
2001-2003GMC Sierra 1500 HD GMC Sierra 1500 HD Serpentine Belt Tensioner
2005-2006GMC Sierra 1500 HD GMC Sierra 1500 HD Serpentine Belt Tensioner
2007GMC Sierra 1500 HD Classic GMC Sierra 1500 HD Classic Serpentine Belt Tensioner
2005-2006GMC Sierra 2500 HD GMC Sierra 2500 HD V8 6.0L (8th Vin Digit N) Water Pump Belt Serpentine Belt Tensioner
2007GMC Sierra 2500 HD Classic GMC Sierra 2500 HD Classic V8 6.0L (8th Vin Digit N) Water Pump Belt Serpentine Belt Tensioner
2001-2006GMC Sierra 3500 GMC Sierra 3500 V8 6.0L (8th Vin Digit U) Water Pump Belt Serpentine Belt Tensioner
2005-2006GMC Sierra 3500 GMC Sierra 3500 V8 6.0L (8th Vin Digit N) Water Pump Belt Serpentine Belt Tensioner
2007GMC Sierra 3500 Classic GMC Sierra 3500 Classic V8 6.0L (8th Vin Digit U) Water Pump Belt Serpentine Belt Tensioner
2007GMC Sierra 3500 Classic GMC Sierra 3500 Classic V8 6.0L (8th Vin Digit K) Water Pump Belt Serpentine Belt Tensioner
2007GMC Sierra 3500 Classic GMC Sierra 3500 Classic V8 6.0L (8th Vin Digit N) Water Pump Belt Serpentine Belt Tensioner
2001-2006GMC Yukon GMC Yukon V8 5.3L (8th Vin Digit T or U) Water Pump Belt Serpentine Belt Tensioner
2001-2006GMC Yukon GMC Yukon V8 4.8L (8th Vin Digit V) Water Pump Belt Serpentine Belt Tensioner
2002-2006GMC Yukon GMC Yukon V8 5.3L (8th Vin Digit Z) Water Pump Belt Serpentine Belt Tensioner
2007GMC Yukon GMC Yukon V8 6.2L (8th Vin Digit 8) Water Pump Belt Serpentine Belt Tensioner
2007GMC Yukon GMC Yukon V8 5.3L (8th Vin Digit 0 or J) Water Pump Belt Serpentine Belt Tensioner
2007GMC Yukon GMC Yukon V8 4.8L (8th Vin Digit C) Water Pump Belt Serpentine Belt Tensioner
2000-2005GMC Yukon XL 1500 GMC Yukon XL 1500 V8 5.3L (8th Vin Digit T) Water Pump Belt Serpentine Belt Tensioner
2002-2006GMC Yukon XL 1500 GMC Yukon XL 1500 V8 5.3L (8th Vin Digit Z) Water Pump Belt Serpentine Belt Tensioner
2007GMC Yukon XL 1500 GMC Yukon XL 1500 V8 5.3L (8th Vin Digit 0, 3, or J) Water Pump Belt Serpentine Belt Tensioner
2000-2006GMC Yukon XL 2500 GMC Yukon XL 2500 V8 6.0L (8th Vin Digit U) Serpentine Belt Tensioner
2007GMC Yukon XL 2500 GMC Yukon XL 2500 V8 6.0L (8th Vin Digit K or Y) Water Pump Belt Serpentine Belt Tensioner
2003-2007Hummer H2 Hummer H2 V8 6.0L (8th Vin Digit U) Water Pump Belt Serpentine Belt Tensioner
2003-2004Isuzu Ascender Isuzu Ascender V8 5.3L (8th Vin Digit P) Serpentine Belt Tensioner
2005-2006Isuzu Ascender Isuzu Ascender V8 5.3L (8th Vin Digit M) Serpentine Belt Tensioner
Part 1AEBT00024
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