2012 Chevrolet Silverado 2500 HD Alternators

Genuine GM alternators for the 2012 Chevrolet Silverado 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.

When to replace

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

Why buy OEM here

• Real wholesale. The same alternators your dealer sells, at a fraction over our cost.
• OEM, not lookalike. With alternators the difference shows up on installation day, not in the photo.
• VIN verified fitment. We confirm the alternators number against your vehicle before it ships.

Avoiding the wrong part

Buying factory removes the variable. You are installing what the plant installed. We would rather spend two minutes verifying than process a return next week. Orders confirmed before mid-afternoon Central are on a truck that evening.