XDP XD351 High Output Alternator – 2007.5-2010 LMM Duramax

Upgrade the charging system on your 2007.5-2010 GM 6.6L Duramax LMM with the XDP XD351 High Output Alternator. This direct bolt-on unit delivers significantly more amperage than the factory alternator so you can reliably power aftermarket lights, stereos, on-board air systems, snow plows, winches, and other high-draw accessories without overloading your electrical system.

Key Features

• 220 Amp peak output / 150 Amp at idle for strong charging performance even at low RPM
• Direct bolt-on replacement — uses factory mounting points, belt, and electrical connections
• 100% brand new (no core charge)
• Durable wrinkle black finish for improved under-hood appearance and corrosion resistance
• Pre-tested with results card included
• Optional additional ground lug (wiring required if used)

Fitment

2007.5–2010 Chevrolet Silverado / GMC Sierra 2500HD & 3500HD with 6.6L Duramax LMM

Why Upgrade?

The stock alternator on LMM trucks is often the weak link once you start adding electrical accessories. The XDP XD351 reduces strain on the charging system, helps maintain stable voltage, and gives you the headroom needed for modern truck builds.

Warranty: 2-Year / Unlimited Mileage (XDP)

Ready to install and built for the demands of a modified Duramax.