Valeo 849159 Alternator

Valeo 849159 Alternator Overview

The Valeo 849159 alternator is a 14-volt, 145-amp charging unit built with an internal fan, internal regulator, and clockwise rotation. It uses a 6-groove serpentine pulley with a 57 mm pulley diameter, making it a direct-fit option for a wide range of GM trucks, SUVs, and vans.

Valeo’s Alternator line focuses on OE-style electrical performance, and this premium unit is 100% new. That helps reduce the risk associated with remanufactured components while supporting stable charging output for daily driving and heavy electrical loads.

Key Features

• 14V alternator with 145 amp output
• Internal fan and internal voltage regulator
• Clockwise rotation
• 6-groove serpentine pulley
• 57 mm pulley diameter
• Technical number: TG15S269
• Part number: 849159

Detailed Product Description

Built for charging-system replacement on GM platforms, the Valeo 849159 alternator supports vehicles such as the Chevrolet Silverado 1500, GMC Sierra 1500, Chevrolet Express 2500, and GMC Savana 3500. It also appears in fitment for applications including the Chevrolet Tahoe, GMC Yukon, Hummer H2, and Buick Rainier across the listed model years. This part cross-references Bosch AL8515X for the same application.

As a Valeo Alternator product, this unit is engineered for consistent voltage control and dependable output under normal electrical demand. The 145-amp rating is appropriate for vehicles with factory accessories and charging requirements that rely on stable system performance. The 849159 alternator is also identified by technical number TG15S269.

What This Alternator Helps Address

• Battery warning lights caused by charging-system failure
• Low-voltage conditions during idle or accessory use
• Dim headlights or inconsistent electrical performance
• Hard starts related to insufficient alternator output
• Charging issues on Chevrolet Silverado 1500 and GMC Sierra 1500 applications

Installation Notes and Fitment Tips

Confirm pulley diameter, groove count, rotation direction, amperage rating, and regulator style before installation. This alternator is listed for 2003-2016 Chevrolet Express 2500 and Express 3500, 2003-2016 GMC Savana 2500 and Savana 3500, 2003-2007 Chevrolet Silverado 1500, and 2003-2006 GMC Sierra 1500 among other applications. Fitment also includes 2004-2007 Hummer H2 and 2005-2006 Saab 9-7x.

• Fits 2003-2016 Chevrolet Express 2500, N/A
• Fits 2003-2016 Chevrolet Express 3500, N/A
• Fits 2003-2016 GMC Savana 2500, N/A
• Fits 2003-2016 GMC Savana 3500, N/A
• Fits 2003-2007 Chevrolet Silverado 1500, N/A
• Fits 2003-2006 GMC Sierra 1500, N/A
• Fits 2004-2007 Hummer H2, N/A
• Fits 2005-2006 Saab 9-7x, N/A

Quality Assurance

Valeo has supplied original equipment alternators since 1923 and is recognized for electrical system expertise. The brand’s alternator development includes design improvements aimed at reducing voltage drop and supporting fuel economy, while this premium replacement is supplied as a new unit rather than a remanufactured one.