Bosch AL8743X Alternator

Bosch Remanufactured Alternator AL8743X

The Bosch AL8743X is a remanufactured 12-volt alternator built for dependable charging performance in select Chevrolet Express 2500, Chevrolet Express 3500, GMC Savana 2500, and GMC Savana 3500 applications. It is engineered with an internal fan, internal regulator, and a 105-amp rating to support stable electrical output in daily driving and fleet use.

Key Features

• Remanufactured Bosch alternator for 12-volt charging systems
• 105-amp amperage rating for OE-style electrical output
• Internal fan and internal regulator design
• Clockwise rotation
• 6-groove pulley included with 57 mm outside diameter
• Aluminum case and aluminum case material
• Plug type 314 with rear-view plug clock at 6 o’clock
• External fan included and external regulator included

Product Details

Bosch Premium Alternators are remanufactured, tested charging components built to deliver consistent performance and reliability. This AL8743X alternator is configured for vehicles that require a 12-volt, 105-amp unit with a 6S pulley type and clockwise rotation. It cross-references 22817847 for the same application. Use this Bosch AL8743X when replacing a worn charging unit on 2009-2015 Chevrolet Express 2500, 2013-2015 Chevrolet Express 3500, 2009-2015 GMC Savana 2500, and 2013-2015 GMC Savana 3500 models.

What It Helps Address

• Battery warning light caused by weak charging output
• Dim headlights or unstable electrical performance
• Charging system noise from a failing alternator assembly
• Low-voltage conditions affecting accessories and starting
• Alternator replacement needs on high-use vans and fleet vehicles

Installation Notes and Tips

Verify plug type 314, pulley configuration, rotation direction, and amperage rating before installation. Confirm the vehicle uses a 105-amp alternator application and match the mounting and connector orientation to the original unit. Inspect the belt, tensioner, and charging system wiring during replacement to help ensure proper operation after installation.

Quality Assurance

Bosch remanufactured alternators are built and tested to meet charging-system performance and reliability expectations. The AL8743X is a remanufactured Bosch charging component designed for direct replacement use in the listed Chevrolet and GMC applications.