2010 GMC Sierra 3500 HD Alternators

Genuine GM alternators for the 2010 GMC Sierra 3500 HD, at wholesale prices. Alternator output rating varies by electrical load, so a truck with a tow package or upfit wiring takes a different unit. One-ton heavy duty truck in single and dual rear wheel and chassis cab form.

Signs it is time

A battery light, dimming headlights at idle, or a no-start after a short drive. On a heavy duty pickup, two trucks with the same badge can take different parts once cab style and drivetrain are accounted for.

The case for genuine GM

• Central shipping origin. Dallas keeps alternators transit times short nationwide.
• Backed after the sale. If your alternators does not work out, we make it right.
• Factory warranty. Genuine alternators carry GM coverage aftermarket cannot match.

Making sure it fits

GM revises parts mid-production. The OEM catalog tracks those revisions; cross-reference tables usually do not. Send us your VIN and we will confirm the exact part number before you order. Orders in by 3pm Central usually go out the same day, with shipping calculated at real cost.