2010 Hummer H3 Alternators

Genuine GM alternators for the 2010 Hummer H3, at wholesale prices. Alternator output rating varies by electrical load, so a truck with a tow package or upfit wiring takes a different unit. GMT345 built on the Colorado and Canyon platform with a five-cylinder or 5.3L V8.

Signs it is time

A battery light, dimming headlights at idle, or a no-start after a short drive. On a mid-size SUV, suspension type and towing package split this group, and neither is visible from outside the vehicle.

Buying OEM, briefly

• Factory warranty. Genuine alternators carry GM coverage aftermarket cannot match.
• Dealer parts, not dealer prices. Compare our alternators pricing against a counter quote.
• Genuine GM only. Every alternators listing carries the original factory part number.
• Fitment checked by a person. Send the VIN and we verify the alternators before the box leaves.
• Central shipping origin. Dallas keeps alternators transit times short nationwide.

Making sure it fits

Factory parts are built to the tolerances the vehicle was engineered around, not copied from a worn sample. A photo is rarely enough to order from. The VIN takes seconds and removes the guesswork. Freight is quoted at what it actually costs, not inflated to subsidize a headline discount.