ACDelco 12732668 GM OE Serpentine Belt 2.8L Duramax LWN Diesel

The ACDelco 12732668 is a GM Original Equipment serpentine belt engineered specifically for the 2.8L Duramax LWN turbocharged diesel engine. As a genuine GM OE part, it is manufactured to the exact specifications required by General Motors, ensuring a precise fit and reliable performance right out of the box.

The serpentine belt drives critical engine accessories — including the alternator, power steering pump, and other belt-driven components — using a single continuous belt routed around multiple pulleys. Replacing this belt at recommended service intervals helps prevent unexpected failures and keeps essential systems operating correctly.

Key Features:

• Genuine GM Original Equipment part — built to OE specifications
• Constructed from durable EPDM (Ethylene Propylene) rubber compound for temperature and crack resistance
• Ribbed profile ensures secure contact and consistent traction across all driven pulleys
• Designed for the 2.8L Duramax LWN turbocharged diesel engine
• Direct OEM replacement — no modifications required for installation
• Backed by General Motors quality standards and testing

When servicing this belt, it is also recommended to inspect the belt tensioner and idler pulleys for wear, as these components experience similar stress and can affect the longevity of the new belt. GM OE part number: 12732668.