Bosch AL8555N Alternator
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Bosch
 Alternator (New)

Bosch AL8555N Alternator

Brand Bosch AL8555N
Voltage 14
Fan Type Internal
Ground Type Negative
Mounting Configuration Code Short
Rotation Direction Clockwise (right)
One Wire Capable No
Pulley Included Yes
External Regulator Included Yes
Pulley Groove Quantity 6
Outside Pulley Diameter 61.5
Regulator Type Internal
Decoupled Or Clutch Pulley No
AC Service Tap No
Amperage Rating 160
Mounting Type Single pivoted lever
Automotive Item Weight (lbs) 16.027606 lb
New Or Remanufactured New
Product Length 7.244094 in
Pulley Type / Belt Type (Alternator) 6s
Product line Alternator (New)
Fits Cadillac, Chevrolet, GMC, and Hummer · 111 vehicles

New replacement unit. Built for charging-system service with Bosch engineering and testing.

14-volt output. 160-amp rating supports stable electrical performance in demanding use.

Complete pulley setup. Includes a 6-groove pulley for the specified belt-drive configuration.

Cross-references 25877026 for the same application. See all 1.

$252.59Free shipping
In stock · usually ships same day before 1pm CST
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Order total $252.59
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.
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Alternator Overview

Bosch AL8555N is a new alternator built for charging-system replacement on a wide range of GM trucks and SUVs. It is a 14-volt unit with a 160-amp rating, internal regulation, and a clockwise rotation design for applications that require this configuration.

Key Features

  • New Bosch alternator for charging-system service
  • 14-volt output with 160-amp amperage rating
  • Internal fan and internal regulator design
  • Includes pulley with 6-groove belt drive
  • Single pivoted lever mounting configuration
  • Negative ground, clockwise rotation, short mounting code

Detailed Description

The Bosch AL8555N alternator is engineered as a new replacement unit for vehicles that need stable electrical output and proper belt-drive alignment. Its 61.5 mm pulley, 6S pulley type, and included external regulator support the specified charging-system layout, while the internal fan and internal regulator help match the original equipment style used in many GM applications. This part cross-references GM 25877026 for the same application. Fits 2007-2014 Cadillac Escalade, N/A; Fits 2007-2014 Chevrolet Silverado 2500 HD, N/A; Fits 2010-2014 GMC Sierra 3500 HD, N/A.

Common Uses

  • Restores charging output when the alternator is no longer maintaining system voltage
  • Addresses battery drain caused by a weak or failing charging unit
  • Helps correct warning lights related to charging-system performance
  • Replaces a worn pulley or regulator assembly in a matching application
  • Supports electrical demand from vehicle accessories and onboard systems

Installation Notes

Verify pulley groove count, rotation direction, mounting configuration, and regulator style before installation. Confirm the application uses a 14-volt, negative-ground alternator with a 6-groove belt drive and short mounting code. Fitment includes multiple Cadillac, Chevrolet, GMC, and Hummer applications; review the exact vehicle listing before ordering.

Quality Assurance

Bosch Premium Alternators are designed, built, and tested for performance and reliability. AL8555N is a new unit, not remanufactured, and is backed by Bosch manufacturing standards for charging-system replacement.

Related reading

This part fits 111 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelDrive TypeLitersCylindersFuel TypeNotes
2014CadillacEscalade—6.2LV8—Alternator (New)
2014CadillacEscalade ESV—6.2LV8—Alternator (New)
2014ChevroletSilverado 2500 HD—6.0LV8—Alternator (New)
2014ChevroletSilverado 3500 HDRWD6.0LV8GASAlternator (New)
2014ChevroletSuburban 1500—5.3LV8—Alternator (New)
2014ChevroletTahoe—5.3LV8—Alternator (New)
2014GMCSierra 2500 HD—6.0LV8—Alternator (New)
2014GMCSierra 3500 HD—6.0LV8—Alternator (New)
2014GMCYukon—5.3LV8—Alternator (New)
2014GMCYukon XL 1500—5.3LV8—Alternator (New)
2013CadillacEscalade—6.2LV8—Alternator (New)
2013CadillacEscalade ESV—6.2LV8—Alternator (New)
2013CadillacEscalade EXT—6.2LV8—Alternator (New)
2013ChevroletAvalanche—5.3LV8—Alternator (New)
2013ChevroletSilverado 1500—5.3LV8—Alternator (New)
2013ChevroletSilverado 2500 HD—6.0LV8—Alternator (New)
2013ChevroletSilverado 3500 HDRWD6.0LV8GASAlternator (New)
2013ChevroletSuburban 1500—5.3LV8—Alternator (New)
2013ChevroletSuburban 2500—6.0LV8—Alternator (New)
2013ChevroletTahoe—5.3LV8—Alternator (New)
2013GMCSierra 1500—5.3LV8—Alternator (New)
2013GMCSierra 2500 HD—6.0LV8—Alternator (New)
2013GMCSierra 3500 HD—6.0LV8—Alternator (New)
2013GMCYukon—5.3LV8—Alternator (New)
2013GMCYukon XL 1500—5.3LV8—Alternator (New)
2013GMCYukon XL 2500—6.0LV8—Alternator (New)
2012CadillacEscalade—6.2LV8—Alternator (New)
2012CadillacEscalade ESV—6.2LV8—Alternator (New)
2012CadillacEscalade EXT—6.2LV8—Alternator (New)
2012ChevroletAvalanche—5.3LV8—Alternator (New)
2012ChevroletSilverado 1500—5.3LV8—Alternator (New)
2012ChevroletSilverado 2500 HD—6.0LV8—Alternator (New)
2012ChevroletSilverado 3500 HDRWD6.0LV8GASAlternator (New)
2012ChevroletSuburban 1500—5.3LV8—Alternator (New)
2012ChevroletSuburban 2500—6.0LV8—Alternator (New)
2012ChevroletTahoe—5.3LV8—Alternator (New)
2012GMCSierra 1500—5.3LV8—Alternator (New)
2012GMCSierra 2500 HD—6.0LV8—Alternator (New)
2012GMCSierra 3500 HD—6.0LV8—Alternator (New)
2012GMCYukon—5.3LV8—Alternator (New)
2012GMCYukon XL 1500—5.3LV8—Alternator (New)
2012GMCYukon XL 2500—6.0LV8—Alternator (New)
2011CadillacEscalade—6.2LV8—Alternator (New)
2011CadillacEscalade ESV—6.2LV8—Alternator (New)
2011CadillacEscalade EXT—6.2LV8—Alternator (New)
2011ChevroletAvalanche—5.3LV8—Alternator (New)
2011ChevroletSilverado 1500—5.3LV8—Alternator (New)
2011ChevroletSilverado 2500 HD—6.0LV8—Alternator (New)
2011ChevroletSilverado 3500 HDRWD6.0LV8GASAlternator (New)
2011ChevroletSuburban 1500—5.3LV8—Alternator (New)
2011ChevroletSuburban 2500—6.0LV8—Alternator (New)
2011ChevroletTahoe—5.3LV8—Alternator (New)
2011GMCSierra 1500—5.3LV8—Alternator (New)
2011GMCSierra 2500 HD—6.0LV8—Alternator (New)
2011GMCSierra 3500 HD—6.0LV8—Alternator (New)
2011GMCYukon—5.3LV8—Alternator (New)
2011GMCYukon XL 1500—5.3LV8—Alternator (New)
2011GMCYukon XL 2500—6.0LV8—Alternator (New)
2010CadillacEscalade—6.2LV8—Alternator (New)
2010CadillacEscalade ESV—6.2LV8—Alternator (New)
2010ChevroletAvalanche—5.3LV8—Alternator (New)
2010ChevroletSilverado 1500—5.3LV8—Alternator (New)
2010ChevroletSilverado 2500 HD—6.0LV8—Alternator (New)
2010ChevroletSilverado 3500 HD—6.0LV8GASAlternator (New)
2010ChevroletSuburban 1500—5.3LV8—Alternator (New)
2010ChevroletSuburban 2500—6.0LV8—Alternator (New)
2010ChevroletTahoe—5.3LV8—Alternator (New)
2010GMCSierra 1500—5.3LV8—Alternator (New)
2010GMCSierra 2500 HD—6.0LV8—Alternator (New)
2010GMCSierra 3500 HD—6.0LV8—Alternator (New)
2010GMCYukon—5.3LV8—Alternator (New)
2010GMCYukon XL 1500—5.3LV8—Alternator (New)
2010GMCYukon XL 2500—6.0LV8—Alternator (New)
2009CadillacEscalade—6.2LV8—Alternator (New)
2009CadillacEscalade ESV—6.2LV8—Alternator (New)
2009CadillacEscalade EXT—6.2LV8—Alternator (New)
2009ChevroletAvalanche—5.3LV8—Alternator (New)
2009ChevroletSilverado 1500—5.3LV8—Alternator (New)
2009ChevroletSilverado 2500 HD—6.6LV8—Alternator (New)
2009ChevroletSuburban 1500—5.3LV8—Alternator (New)
2009ChevroletSuburban 2500—6.0LV8—Alternator (New)
2009ChevroletTahoe—5.3LV8—Alternator (New)
2009GMCSierra 1500—5.3LV8—Alternator (New)
2009GMCYukon—5.3LV8—Alternator (New)
2009GMCYukon XL 1500—5.3LV8—Alternator (New)
2009GMCYukon XL 2500—6.0LV8—Alternator (New)
2009HummerH2—6.2LV8—Alternator (New)
2008CadillacEscalade—6.2LV8—Alternator (New)
2008CadillacEscalade ESV—6.2LV8—Alternator (New)
2008CadillacEscalade EXT—6.2LV8—Alternator (New)
2008ChevroletAvalanche—5.3LV8—Alternator (New)
2008ChevroletSilverado 1500—5.3LV8—Alternator (New)
2008ChevroletSilverado 2500 HD—6.6LV8—Alternator (New)
2008ChevroletSuburban 1500—5.3LV8—Alternator (New)
2008ChevroletTahoe—5.3LV8—Alternator (New)
2008GMCSierra 1500—5.3LV8—Alternator (New)
2008GMCYukon—4.8LV8—Alternator (New)
2008GMCYukon XL 1500RWD6.2LV8—Alternator (New)
2008GMCYukon XL 2500—6.0LV8—Alternator (New)
2008HummerH2—6.2LV8—Alternator (New)
2007CadillacEscalade—6.2LV8—Alternator (New)
2007CadillacEscalade ESV—6.2LV8—Alternator (New)
2007CadillacEscalade EXT—6.2LV8—Alternator (New)
2007ChevroletAvalanche—5.3LV8—Alternator (New)
2007ChevroletSilverado 1500—5.3LV8—Alternator (New)
2007ChevroletSilverado 2500 HD—6.6LV8—Alternator (New)
2007ChevroletSuburban 1500—5.3LV8—Alternator (New)
2007ChevroletTahoe—5.3LV8—Alternator (New)
2007GMCSierra 1500—5.3LV8—Alternator (New)
2007GMCYukon XL 1500—6.0LV8—Alternator (New)
2007GMCYukon XL 2500—6.0LV8—Alternator (New)
Directly replaces or cross-references 1 part number
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
25877026