2010 GMC Sierra 1500 Alternators

Genuine GM alternators for the 2010 GMC Sierra 1500, 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 through 2013, K2XX from 2014 to 2018, and the T1XX from 2019 with the CarbonPro bed option.

How you know

A battery light, dimming headlights at idle, or a no-start after a short drive. On a light duty pickup, box length and cab style drive more part number splits here than the engine does.

The case for genuine GM

• Ships from Dallas. Alternators ordered by 3pm Central go out the same business day.
• Straightforward returns. No restocking games on alternators that did not fit.
• GM stands behind it. The alternators warranty comes from the manufacturer, not from us.

Confirming fitment

When a component is superseded, GM documents why. That history is worth having when something failed early. Two vehicles off the same line in the same week can take different parts. The VIN is how we tell. Most orders leave the same day. Oversized and freight items take an extra day to crate.