Ignitions and Electrical› Charging Systems

Powermaster

ALT GM DIESEL BLK WRINKLE 220A 6 GRV

$543.89

SKU: P01Q 58302W

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Description

The Powermaster 58302W is a high-output alternator designed as a direct replacement for 2007.5-2010 GM Duramax 6.6L (LMM) engines. It delivers 220+ amps at peak and 150+ amps at idle, utilizing a GM AD244 case style and a 6-groove serpentine pulley. Each unit is individually dyno tested for guaranteed performance.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandPowermaster
Part NumberP01Q 58302W

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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