2014 GMC Sierra 2500 HD Alternators

Genuine GM alternators for the 2014 GMC Sierra 2500 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. GMT900 HD through 2014, K2XX HD from 2015 to 2019, and the T1XX HD from 2020.

What sends people here

A battery light, dimming headlights at idle, or a no-start after a short drive. On a heavy duty pickup, cab configuration, drivetrain and box length all split this group, so the badge on the tailgate is not enough to order from.

What sets these apart

• No hassle returns. If the alternators is not right, send it back.
• Warranty intact. OEM alternators keep coverage that an aftermarket part can void.
• Wholesale pricing. Most alternators numbers land well below dealer list.
• No aftermarket substitutes. These are GM alternators, not OE-style equivalents.

Before you order

A part validated on this vehicle behaves differently from one validated across a range of vehicles. Fitment questions are the one thing worth a phone call before checkout rather than after delivery. We ship from Dallas, which keeps transit times short across most of the country.