Remy 12842 Alternator

Remanufactured Alternator for GM Trucks and SUVs

This Remy Premium Remanufactured alternator is a 12-volt charging system component built for select Cadillac, Chevrolet, and GMC applications. With a 125-amp amperage rating, internal voltage regulator, internal fan, and included pulley, it supports stable electrical output for vehicles that rely on a Bosch-style alternator design.

Part number 12842 is a remanufactured unit with clockwise rotation and OE manufacturer reference to Bosch. It is a direct-fit option for many 2007-2014 Chevrolet Silverado HD and GMC Sierra HD models, along with select Express, Savana, Suburban, Yukon XL, Escalade, and related applications.

Key Features

• Remy Premium Remanufactured alternator
• 125-amp output for 12-volt charging systems
• Internal voltage regulator for integrated control
• Internal fan design
• Pulley included
• Clockwise rotation
• OE manufacturer reference: Bosch
• Part number 12842

Product Details

Remy 12842 is built for drivers replacing a worn or failing alternator in GM trucks and SUVs that use a Bosch unit. This alternator supports the vehicle’s charging system by helping maintain battery charge and electrical supply for accessories, ignition, and onboard electronics. It cross-references Bosch-style applications and related part numbers including 0-124-425-035 and 15204278 for the same application.

Compatible vehicle coverage includes Fits 2014 Cadillac Escalade, N/A; Fits 2014 Cadillac Escalade ESV, N/A; Fits 2009-2014 Chevrolet Express 1500, N/A; Fits 2011-2014 Chevrolet Silverado 2500 HD, N/A; Fits 2007-2014 Chevrolet Silverado 3500 HD, N/A; Fits 2009-2014 GMC Savana 1500, N/A; Fits 2007-2014 GMC Sierra 2500 HD, N/A; Fits 2007-2014 GMC Sierra 3500 HD, N/A; Fits 2007-2013 Chevrolet Suburban 2500, N/A; and Fits 2007-2013 GMC Yukon XL 2500, N/A.

Common Problems This Part Can Address

• Battery warning light caused by weak charging output
• Dim lights or inconsistent electrical performance
• Battery not staying charged during normal driving
• Alternator noise or charging system failure
• Electrical strain on high-demand GM truck and SUV systems

Installation Notes and Tips

Verify the OE-style Bosch application, 12-volt system, 125-amp rating, clockwise rotation, and pulley configuration before installation. Confirm connector style and vehicle-specific fitment against the application list, especially on 2011-2013 Chevrolet Express 1500 models noted with a 2-pin alternator plug. Inspect the belt, battery condition, and charging cables during replacement to help avoid repeat charging-system issues.

Quality Assurance

Remy Premium Remanufactured parts are remanufactured to restore core functionality for charging-system service. Part number 12842 is built for direct replacement use in confirmed GM applications and follows the OE manufacturer reference to Bosch.