2012 GMC Sierra 2500 HD Serpentine Belts

Genuine GM serpentine belts for the 2012 GMC Sierra 2500 HD, at wholesale prices. Belt length is determined by the accessory layout, which changes with AC, alternator rating and tow package. GMT900 HD through 2014, K2XX HD from 2015 to 2019, and the T1XX HD from 2020.

When you need them

Squeal on cold start, visible cracking, or a belt that keeps throwing. On a heavy duty pickup, box length and cab style drive more part number splits here than the engine does.

What sets these apart

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

Getting the right part

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.