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Dieselsite

DIESELSITE 6.5L Chevy/GMC Alternator Pulley -ALTP65

$58.45

SKU: D03C ALTP65

In Stock
In Stock
Ships by Jun 15
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Beginner — under 30 min

Description

The DieselSite 6.5L Chevy/GMC Alternator Pulley is a direct-fit replacement designed to address issues arising from the use of incorrect, gasoline-engine alternator pulleys on diesel engines. It restores correct tachometer readings and resolves belt tensioner problems, preventing loose belts, squeaking, and premature wear.

Constructed from 6061 aluminum with an anodized finish for corrosion resistance, this pulley has an approximate outside diameter of 2.36 inches. If your current pulley measures this diameter, it is likely the incorrect gas version.

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

BrandDieselsite
Part NumberD03C ALTP65

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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