When it comes to your Pontiac G8 GT’s electrical system, nothing beats the fitment and reliability of genuine GM replacement components.

The ACDelco GM Genuine 140-Amp Alternator (92513881) is a brand-new, factory-spec replacement designed specifically for the 2008–2009 Pontiac G8 GT equipped with the 6.0L L76 V8 engine.

Unlike refurbished or remanufactured alternators, this is a completely new GM Genuine Parts unit, providing original equipment quality without relying on previously used or rebuilt internal components.

Genuine GM Quality & Reliability

Your alternator is responsible for maintaining battery charge and supplying electrical power to critical vehicle systems while the engine is running.

From the engine management system and ignition coils to headlights, climate control, and onboard electronics, maintaining a healthy charging system is essential for dependable operation.

With a factory-rated 140-amp output, this ACDelco alternator is engineered to meet the original electrical demands of the Pontiac G8 GT.

GM Genuine Parts alternators are designed, engineered, and tested to meet General Motors’ standards for performance and reliability.

Direct OEM Replacement

Forget about modifying brackets, changing wiring connectors, or adapting aftermarket components.

This alternator is designed to replace the original equipment unit using the factory mounting arrangement, electrical connections, and serpentine belt configuration.

It features an internally regulated charging system and comes equipped with the appropriate 6-groove pulley.

Whether you’re replacing a failed alternator, addressing charging system issues, or restoring your G8 GT with genuine factory components, this is an excellent solution for maintaining original equipment performance.

Brand New – Not Remanufactured

Many replacement alternators on the market are remanufactured units built using previously used housings and components.

This is NOT one of them.

The ACDelco GM Genuine 92513881 alternator is supplied as a brand-new OEM replacement, making it an ideal choice for owners who prefer genuine factory-quality parts over rebuilt alternatives.

Product Specifications

• Manufacturer: ACDelco / GM Genuine Parts
• GM Part Number: 92513881
• Replaces GM Part Number: 92191127
• Vehicle Fitment: 2008–2009 Pontiac G8 GT
• Engine: 6.0L L76 V8
• Amperage: 140 Amps
• Electrical System: 12V
• Voltage Regulator: Internal
• Pulley: 6-Groove Serpentine
• Pulley Diameter: 58mm / 2.28″
• Housing: Aluminum
• Condition: Brand New
• Quantity: 1 Alternator

Fitment Note: Designed for the 2008–2009 Pontiac G8 GT equipped with the factory 6.0L V8. Not intended as a high-output charging system upgrade for vehicles with substantial additional electrical demands.