Replaces

Serpentine Belt Tensioner with Pulley ACDelco 38103 - 1AACD00009

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Vehicle Fit

AC DELCO 38103 - [DRIVE BELT TENSIONER ASSEMBLY]

This SERPENTINE BELT TENSIONER is a brand new, AC Delco part. It is the same part that you would receive if you purchased it from your local dealer!

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: 8-12456-152-0, 8124561520, 10239670, 12456152, 89017309, 38103
  • Brand new, not rebuilt or remanufactured
  • Bolts to front of engine
  • Built to strict quality control standards

Note: 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

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 (0:47)
    • Check the tension of the belt by hand
    • Locate the serpentine belt diagram
    • Familiarize yourself with the route of the serpentine belt
    • With a 3/8 inch drive ratchet pull the belt tensioner aside to loosen the belt
    • Pull the belt off of the idler pull
    • Pull the belt out
  2. step : Removing the Serpentine Belt Tensioner (2:19)
    • Remove the 15mm bolt from the tensioner
    • Pull off the tensioner by hand
  3. step : Installing the New Serpentine Belt Tensioner (2:54)
    • Push the tensioner into place using the locating tab
    • Start the 15mm bolt by hand
    • Tighten the bolt to between 35-40 foot-pounds
  4. step : Reinstalling the Serpentine Belt (3:38)
    • Loop the belt around the crank pulley
    • Bring it around the water pump
    • Bring it around the power steering pulley
    • Bring it around the A/C pulley
    • Bring it around the tensioner and the alternator
    • Start to press it under the idler pulley
    • Use the 3/8 inch drive ratchet to move the tensioner and loosen the belt
    • Press the belt underneath the idler pulley
    • Check that the belt is routed correctly

Tools needed for replacement:

    Ratchets & Related

  • 3/8 Inch Drive Ratchet
  • Ratchet
  • Torque Wrench

  • Sockets - Metric

  • 15mm Socket

  • Wrenches - Metric

  • 15mm Wrench

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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) ACDelco 38103
1996-2001Chevy Astro Chevy Astro Serpentine Belt Tensioner with Pulley V6 4.3L (8th Vin Digit W) ACDelco 38103
2002-2005Chevy Astro Chevy Astro Serpentine Belt Tensioner with Pulley V6 4.3L (8th Vin Digit X) ACDelco 38103
1996-2002Chevy Blazer S10 Chevy Blazer S10 Serpentine Belt Tensioner with Pulley V6 4.3L (8th Vin Digit W) ACDelco 38103
2003-2005Chevy Blazer S10 Chevy Blazer S10 Serpentine Belt Tensioner with Pulley V6 4.3L (8th Vin Digit X) ACDelco 38103
1996-1999Chevy C1500 Truck Chevy C1500 Truck Serpentine Belt Tensioner with Pulley V8 5.0L ACDelco 38103
1996-1999Chevy C1500 Truck Chevy C1500 Truck Serpentine Belt Tensioner with Pulley V8 5.7L ACDelco 38103
1996-1998Chevy C1500 Truck Chevy C1500 Truck Serpentine Belt Tensioner with Pulley V6 4.3L ACDelco 38103
1996-1998Chevy C2500 Truck Chevy C2500 Truck Serpentine Belt Tensioner with Pulley V8 5.0L ACDelco 38103
1996-2000Chevy C2500 Truck Chevy C2500 Truck Serpentine Belt Tensioner with Pulley V8 7.4L ACDelco 38103
1996-2000Chevy C2500 Truck Chevy C2500 Truck Serpentine Belt Tensioner with Pulley V8 5.7L ACDelco 38103
1996-2000Chevy C3500 Truck Chevy C3500 Truck Serpentine Belt Tensioner with Pulley V8 5.7L ACDelco 38103
1996-2000Chevy C3500 Truck Chevy C3500 Truck Serpentine Belt Tensioner with Pulley V8 7.4L ACDelco 38103
1996-2002Chevy Express 1500 Van Chevy Express 1500 Van Serpentine Belt Tensioner with Pulley V6 4.3L (8th Vin Digit W) ACDelco 38103
1996-2002Chevy Express 1500 Van Chevy Express 1500 Van Serpentine Belt Tensioner with Pulley (8th Vin Digit R) V8 5.7L ACDelco 38103
1996-2002Chevy Express 1500 Van Chevy Express 1500 Van Serpentine Belt Tensioner with Pulley V8 5.0L (8th Vin Digit M) ACDelco 38103
2003-2014Chevy Express 1500 Van Chevy Express 1500 Van Serpentine Belt Tensioner with Pulley V6 4.3L (8th Vin Digit X) ACDelco 38103
1996Chevy Express 2500 Van Chevy Express 2500 Van Serpentine Belt Tensioner with Pulley V8 5.0L (8th Vin Digit M) ACDelco 38103
1996-2002Chevy Express 2500 Van Chevy Express 2500 Van Serpentine Belt Tensioner with Pulley (8th Vin Digit R) V8 5.7L ACDelco 38103
1996Chevy Express 2500 Van Chevy Express 2500 Van Serpentine Belt Tensioner with Pulley V6 4.3L (8th Vin Digit W) ACDelco 38103
1998-2002Chevy Express 2500 Van Chevy Express 2500 Van Serpentine Belt Tensioner with Pulley V6 4.3L (8th Vin Digit W) ACDelco 38103
1999-2001Chevy Express 2500 Van Chevy Express 2500 Van Serpentine Belt Tensioner with Pulley V8 5.0L (8th Vin Digit M) ACDelco 38103
2003-2005Chevy Express 2500 Van Chevy Express 2500 Van Serpentine Belt Tensioner with Pulley V6 4.3L (8th Vin Digit X) ACDelco 38103
1996Chevy Express 3500 Van Chevy Express 3500 Van Serpentine Belt Tensioner with Pulley (8th Vin Digit R) V8 5.7L ACDelco 38103
1996Chevy Express 3500 Van Chevy Express 3500 Van Serpentine Belt Tensioner with Pulley V6 4.3L (8th Vin Digit Z) ACDelco 38103
1997-2000Chevy Express 3500 Van Chevy Express 3500 Van Serpentine Belt Tensioner with Pulley (8th Vin Digit J) V8 7.4L ACDelco 38103
1998-2002Chevy Express 3500 Van Chevy Express 3500 Van Serpentine Belt Tensioner with Pulley (8th Vin Digit R) V8 5.7L ACDelco 38103
1996-1999Chevy K1500 Truck Chevy K1500 Truck Serpentine Belt Tensioner with Pulley V8 5.7L ACDelco 38103
1996-1999Chevy K1500 Truck Chevy K1500 Truck Serpentine Belt Tensioner with Pulley V8 5.0L ACDelco 38103
1996-1998Chevy K1500 Truck Chevy K1500 Truck Serpentine Belt Tensioner with Pulley V6 4.3L ACDelco 38103
1996-2000Chevy K2500 Truck Chevy K2500 Truck Serpentine Belt Tensioner with Pulley V8 5.7L ACDelco 38103
1996-2000Chevy K2500 Truck Chevy K2500 Truck Serpentine Belt Tensioner with Pulley V8 7.4L ACDelco 38103
1996-1998Chevy K2500 Truck Chevy K2500 Truck Serpentine Belt Tensioner with Pulley V8 5.0L ACDelco 38103
1996-2000Chevy K3500 Truck Chevy K3500 Truck Serpentine Belt Tensioner with Pulley V8 7.4L ACDelco 38103
1996-2000Chevy K3500 Truck Chevy K3500 Truck Serpentine Belt Tensioner with Pulley V8 5.7L ACDelco 38103
1996-1999Chevy P30 Chevy P30 Serpentine Belt Tensioner with Pulley V8 7.4L ACDelco 38103
1996Chevy P30 Chevy P30 Serpentine Belt Tensioner with Pulley V8 5.7L ACDelco 38103
1996-1997Chevy P30 Chevy P30 Serpentine Belt Tensioner with Pulley V8 7.4L ACDelco 38103
1996-1999Chevy P30 Chevy P30 Serpentine Belt Tensioner with Pulley V8 5.7L ACDelco 38103
1996-1999Chevy P30 Chevy P30 Serpentine Belt Tensioner with Pulley V8 4.3L ACDelco 38103
1998-1999Chevy P30 Chevy P30 Serpentine Belt Tensioner with Pulley V8 7.4L ACDelco 38103
1996-2002Chevy S10 Pickup Chevy S10 Pickup Serpentine Belt Tensioner with Pulley V6 4.3L (8th Vin Digit W) ACDelco 38103
1996-1999Chevy S10 Pickup Chevy S10 Pickup Serpentine Belt Tensioner with Pulley V6 4.3L (8th Vin Digit X) ACDelco 38103
2003-2004Chevy S10 Pickup Chevy S10 Pickup Serpentine Belt Tensioner with Pulley V6 4.3L (8th Vin Digit X) ACDelco 38103
1999-2002Chevy Silverado 1500 Chevy Silverado 1500 Serpentine Belt Tensioner with Pulley V6 4.3L ACDelco 38103
2002-2014Chevy Silverado 1500 Chevy Silverado 1500 Serpentine Belt Tensioner with Pulley V6 4.3L ACDelco 38103
2007Chevy Silverado 1500 Classic Chevy Silverado 1500 Classic Serpentine Belt Tensioner with Pulley V6 4.3L ACDelco 38103
1996-1999Chevy Suburban C1500 Chevy Suburban C1500 Serpentine Belt Tensioner with Pulley V8 5.7L ACDelco 38103
1996-1999Chevy Suburban C2500 Chevy Suburban C2500 Serpentine Belt Tensioner with Pulley ACDelco 38103
1996-1999Chevy Suburban C2500 Chevy Suburban C2500 Serpentine Belt Tensioner with Pulley ACDelco 38103
1996-1999Chevy Suburban K1500 Chevy Suburban K1500 Serpentine Belt Tensioner with Pulley ACDelco 38103
1996-1999Chevy Suburban K2500 Chevy Suburban K2500 Serpentine Belt Tensioner with Pulley ACDelco 38103
1996-1999Chevy Suburban K2500 Chevy Suburban K2500 Serpentine Belt Tensioner with Pulley ACDelco 38103
1996-2000Chevy Tahoe Chevy Tahoe Serpentine Belt Tensioner with Pulley V8 5.7L (8th Vin Digit R) ACDelco 38103
1996-1998GMC C1500 Truck GMC C1500 Truck Serpentine Belt Tensioner with Pulley V6 4.3L ACDelco 38103
1996-1999GMC C1500 Truck GMC C1500 Truck Serpentine Belt Tensioner with Pulley V8 5.0L ACDelco 38103
1996-1999GMC C1500 Truck GMC C1500 Truck Serpentine Belt Tensioner with Pulley V8 5.7L ACDelco 38103
1996-2000GMC C2500 Truck GMC C2500 Truck Serpentine Belt Tensioner with Pulley V8 5.7L ACDelco 38103
1996-2000GMC C2500 Truck GMC C2500 Truck Serpentine Belt Tensioner with Pulley V8 7.4L ACDelco 38103
1996-1998GMC C2500 Truck GMC C2500 Truck Serpentine Belt Tensioner with Pulley V8 5.0L ACDelco 38103
1996-2000GMC C3500 Truck GMC C3500 Truck Serpentine Belt Tensioner with Pulley V8 5.7L ACDelco 38103
1996-2000GMC C3500 Truck GMC C3500 Truck Serpentine Belt Tensioner with Pulley V8 7.4L ACDelco 38103
1996-2001GMC Jimmy S-15 GMC Jimmy S-15 Serpentine Belt Tensioner with Pulley V6 4.3L (8th Vin Digit W) ACDelco 38103
1996-1998GMC K1500 Truck GMC K1500 Truck Serpentine Belt Tensioner with Pulley V6 4.3L ACDelco 38103
1996-1999GMC K1500 Truck GMC K1500 Truck Serpentine Belt Tensioner with Pulley V8 5.7L ACDelco 38103
1996-1999GMC K1500 Truck GMC K1500 Truck Serpentine Belt Tensioner with Pulley V8 5.0L ACDelco 38103
1996-1998GMC K2500 Truck GMC K2500 Truck Serpentine Belt Tensioner with Pulley V8 5.0L ACDelco 38103
1996-2000GMC K2500 Truck GMC K2500 Truck Serpentine Belt Tensioner with Pulley V8 5.7L ACDelco 38103
1996-1999GMC K2500 Truck GMC K2500 Truck Serpentine Belt Tensioner with Pulley V8 7.4L ACDelco 38103
1996-2000GMC K3500 Truck GMC K3500 Truck Serpentine Belt Tensioner with Pulley V8 7.4L ACDelco 38103
1996-2000GMC K3500 Truck GMC K3500 Truck Serpentine Belt Tensioner with Pulley V8 5.7L ACDelco 38103
1996-1997GMC P3500 GMC P3500 Serpentine Belt Tensioner with Pulley V8 7.4L ACDelco 38103
1996-1999GMC P3500 GMC P3500 Serpentine Belt Tensioner with Pulley V8 5.7L ACDelco 38103
1996-1999GMC P3500 GMC P3500 Serpentine Belt Tensioner with Pulley V8 7.4L ACDelco 38103
1996GMC P3500 GMC P3500 Serpentine Belt Tensioner with Pulley V8 5.7L ACDelco 38103
1996-1999GMC S-15 Sonoma GMC S-15 Sonoma Serpentine Belt Tensioner with Pulley V6 4.3L (8th Vin Digit X) ACDelco 38103
1996-2002GMC S-15 Sonoma GMC S-15 Sonoma Serpentine Belt Tensioner with Pulley V6 4.3L (8th Vin Digit W) ACDelco 38103
2003-2004GMC S-15 Sonoma GMC S-15 Sonoma Serpentine Belt Tensioner with Pulley V6 4.3L (8th Vin Digit X) ACDelco 38103
1996-2001GMC Safari GMC Safari Serpentine Belt Tensioner with Pulley V6 4.3L (8th Vin Digit W) ACDelco 38103
2002-2005GMC Safari GMC Safari Serpentine Belt Tensioner with Pulley V6 4.3L (8th Vin Digit X) ACDelco 38103
1996-1997GMC Savana 1500 Van GMC Savana 1500 Van Serpentine Belt Tensioner with Pulley (8th Vin Digit R) V8 5.7L ACDelco 38103
1996-2002GMC Savana 1500 Van GMC Savana 1500 Van Serpentine Belt Tensioner with Pulley V8 5.0L (8th Vin Digit M) ACDelco 38103
1996-2002GMC Savana 1500 Van GMC Savana 1500 Van Serpentine Belt Tensioner with Pulley V6 4.3L (8th Vin Digit W) ACDelco 38103
1999-2002GMC Savana 1500 Van GMC Savana 1500 Van Serpentine Belt Tensioner with Pulley (8th Vin Digit R) V8 5.7L ACDelco 38103
2003-2014GMC Savana 1500 Van GMC Savana 1500 Van Serpentine Belt Tensioner with Pulley V6 4.3L (8th Vin Digit X) ACDelco 38103
1996-1997GMC Savana 2500 Van GMC Savana 2500 Van Serpentine Belt Tensioner with Pulley V8 5.0L (8th Vin Digit M) ACDelco 38103
1996-2002GMC Savana 2500 Van GMC Savana 2500 Van Serpentine Belt Tensioner with Pulley (8th Vin Digit R) V8 5.7L ACDelco 38103
1996GMC Savana 2500 Van GMC Savana 2500 Van Serpentine Belt Tensioner with Pulley V6 4.3L (8th Vin Digit W) ACDelco 38103
1999-2002GMC Savana 2500 Van GMC Savana 2500 Van Serpentine Belt Tensioner with Pulley V8 5.0L (8th Vin Digit M) ACDelco 38103
1999-2002GMC Savana 2500 Van GMC Savana 2500 Van Serpentine Belt Tensioner with Pulley V6 4.3L (8th Vin Digit W) ACDelco 38103
2003-2005GMC Savana 2500 Van GMC Savana 2500 Van Serpentine Belt Tensioner with Pulley V6 4.3L (8th Vin Digit X) ACDelco 38103
1996GMC Savana 3500 Van GMC Savana 3500 Van Serpentine Belt Tensioner with Pulley (8th Vin Digit K) V8 5.7L ACDelco 38103
1996GMC Savana 3500 Van GMC Savana 3500 Van Serpentine Belt Tensioner with Pulley (8th Vin Digit N) V8 7.4L ACDelco 38103
1997-1998GMC Savana 3500 Van GMC Savana 3500 Van Serpentine Belt Tensioner with Pulley (8th Vin Digit J) V8 7.4L ACDelco 38103
1997-2002GMC Savana 3500 Van GMC Savana 3500 Van Serpentine Belt Tensioner with Pulley (8th Vin Digit R) V8 5.7L ACDelco 38103
1997GMC Savana 3500 Van GMC Savana 3500 Van Serpentine Belt Tensioner with Pulley V6 4.3L (8th Vin Digit W) ACDelco 38103
2000GMC Savana 3500 Van GMC Savana 3500 Van Serpentine Belt Tensioner with Pulley (8th Vin Digit J) V8 7.4L ACDelco 38103
1999-2002GMC Sierra 1500 GMC Sierra 1500 Serpentine Belt Tensioner with Pulley V6 4.3L ACDelco 38103
2002-2014GMC Sierra 1500 GMC Sierra 1500 Serpentine Belt Tensioner with Pulley V6 4.3L ACDelco 38103
2007GMC Sierra 1500 Classic GMC Sierra 1500 Classic Serpentine Belt Tensioner with Pulley V6 4.3L ACDelco 38103
1996-1999GMC Suburban C1500 GMC Suburban C1500 Serpentine Belt Tensioner with Pulley V8 5.7L ACDelco 38103
1996-1999GMC Suburban C1500 GMC Suburban C1500 Serpentine Belt Tensioner with Pulley V8 5.7L ACDelco 38103
1996-1999GMC Suburban C1500 GMC Suburban C1500 Serpentine Belt Tensioner with Pulley V8 5.7L ACDelco 38103
1996-1999GMC Suburban C2500 GMC Suburban C2500 Serpentine Belt Tensioner with Pulley V8 5.7L ACDelco 38103
1996-1999GMC Suburban C2500 GMC Suburban C2500 Serpentine Belt Tensioner with Pulley V8 7.4L ACDelco 38103
1996-1999GMC Suburban C2500 GMC Suburban C2500 Serpentine Belt Tensioner with Pulley V8 5.7L ACDelco 38103
1996-1999GMC Suburban C2500 GMC Suburban C2500 Serpentine Belt Tensioner with Pulley V8 7.4L ACDelco 38103
1996-1999GMC Suburban C2500 GMC Suburban C2500 Serpentine Belt Tensioner with Pulley V8 5.7L ACDelco 38103
1996-1999GMC Suburban K1500 GMC Suburban K1500 Serpentine Belt Tensioner with Pulley V8 5.7L ACDelco 38103
1996-1999GMC Suburban K1500 GMC Suburban K1500 Serpentine Belt Tensioner with Pulley V8 5.7L ACDelco 38103
1996-1999GMC Suburban K1500 GMC Suburban K1500 Serpentine Belt Tensioner with Pulley V8 5.7L ACDelco 38103
1996-1999GMC Suburban K2500 GMC Suburban K2500 Serpentine Belt Tensioner with Pulley V8 5.7L ACDelco 38103
1996-1999GMC Suburban K2500 GMC Suburban K2500 Serpentine Belt Tensioner with Pulley V8 7.4L ACDelco 38103
1996-1999GMC Suburban K2500 GMC Suburban K2500 Serpentine Belt Tensioner with Pulley V8 5.7L ACDelco 38103
1996-1999GMC Suburban K2500 GMC Suburban K2500 Serpentine Belt Tensioner with Pulley V8 7.4L ACDelco 38103
1996-1999GMC Suburban K2500 GMC Suburban K2500 Serpentine Belt Tensioner with Pulley V8 5.7L ACDelco 38103
1996-2000GMC Yukon GMC Yukon Serpentine Belt Tensioner with Pulley V8 5.7L (8th Vin Digit R) ACDelco 38103
1997-1999Isuzu Hombre Isuzu Hombre Serpentine Belt Tensioner with Pulley V6 4.3L (8th Vin Digit X) ACDelco 38103
2000Isuzu Hombre Isuzu Hombre Serpentine Belt Tensioner with Pulley V6 4.3L (8th Vin Digit W) ACDelco 38103
1996-2001Oldsmobile Bravada Olds Bravada Serpentine Belt Tensioner with Pulley V6 4.3L (8th Vin Digit W) ACDelco 38103
Only 3 left in stock
Part #: 1AACD00009


Order must be placed by 4pm ET

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AC DELCO
Brand #: 38103

How-to Video:

(05:46 min)