Bosch AL8555X Alternator

Bosch Remanufactured Alternator for GM Trucks and SUVs

The Bosch AL8555X is a remanufactured 12-volt alternator built for GM full-size trucks and SUVs that need stable charging performance. It is a 160-amp unit with an internal fan, internal regulator, and a 6-groove pulley for applications that use a serpentine belt drive.

Bosch Premium Alternators are remanufactured, tested, and built to deliver dependable electrical output for daily driving and demanding towing or accessory loads. This AL8555X alternator is a direct replacement for select Cadillac Escalade, Chevrolet Silverado, Tahoe, Suburban, Avalanche, and GMC Sierra and Yukon models.

Key Features

• 12-volt remanufactured alternator
• 160-amp amperage rating for higher electrical demand
• Internal fan and internal regulator
• Clockwise rotation
• 6-groove pulley with 61 mm outside diameter
• Aluminum case and aluminum case material
• External fan included and pulley included
• Plug type 346 with rear-view plug clock at 6 o’clock
• Not one-wire capable

Detailed Description

The Bosch AL8555X alternator is engineered for vehicles that rely on consistent charging output to support ignition, lighting, climate control, and onboard electronics. Its 160-amp design makes it a strong OE-style replacement for higher-load GM applications, while the internal regulator and internal fan help maintain controlled operation in the charging system. If you are replacing a worn alternator on a Chevrolet Silverado 1500, GMC Sierra 1500, or Cadillac Escalade, this remanufactured Bosch unit is built to match the original electrical setup and belt drive configuration.

Bosch Premium Alternators are remanufactured and tested to support reliable performance and durability. Part number AL8555X also cross-references select OE numbers for the same application.

Common Problems This Part Can Help Solve

• Battery warning light caused by weak charging output
• Dim headlights or unstable electrical performance
• Battery drain from an alternator that no longer maintains voltage
• Charging issues under towing or accessory load
• Noise or failure from a worn alternator assembly

Installation Notes and Tips

Verify pulley style, plug type 346, rotation direction, and 160-amp specification before installation. This alternator uses a 6-groove belt setup and is not one-wire capable. Confirm the vehicle’s charging system configuration on 2007-2014 Cadillac Escalade and Escalade ESV, 2005-2013 Chevrolet Silverado 1500, and 2007-2014 GMC Sierra 1500 applications before replacement.

Compatible vehicle examples include Fits 2007-2014 Cadillac Escalade, N/A; Fits 2005-2013 Chevrolet Silverado 1500, N/A; and Fits 2007-2014 GMC Sierra 1500, N/A. Additional coverage includes Fits 2007-2014 Chevrolet Tahoe, N/A and Fits 2008-2014 GMC Yukon, N/A.

Quality Assurance

Bosch remanufactured alternators are built, tested, and inspected to support dependable charging-system performance. The AL8555X is designed for direct-fit replacement use in select GM applications and follows Bosch Premium Alternators product standards.