ATG13496 Alternator 20881337 25968616 8400207 for Cadillac Escalade Chevrolet Silverado Avalanche GMC Yukon | 12V 145A CW Replacement

Part Numbers

Product Description

The ATG13496 Alternator is an aftermarket replacement charging unit designed for compatible Cadillac, Chevrolet, and GMC vehicles. Operating at 12 volts with a rated output of 145 amps, it supplies electrical power to the vehicle's systems and supports battery charging during normal operation.

This alternator features clockwise (CW) rotation, an internal regulator (IR), and a 6-groove conventional pulley measuring approximately 57 mm in outside diameter. It cross-references AC Delco 334-2811A, Arrowhead ADR0432 and 400-12365, Delco 8400207 and 8400226, and General Motors 20881337 and 25968616. These numbers can help identify the correct replacement for the original charging unit.

The supplied application information lists Cadillac Escalade models with 6.0L and 6.2L V8 engines, along with Chevrolet and GMC light trucks, Chevrolet Colorado, GMC Canyon, and Hummer H3 applications. The product title also references Chevrolet Avalanche, Silverado, Suburban, and GMC Yukon for 2009–2014. Because the detailed fitment data does not confirm every model and year in the title, verify the original alternator number, engine, pulley, and mounting configuration before ordering.

Key Features

• 145A Charging Output: Provides a rated 145-amp output for compatible vehicle electrical systems.

• Internal Regulator: Features an integrated internal voltage regulator.

• 6-Groove Pulley: Uses a conventional pulley with an approximately 57 mm outside diameter.

Product Specifications