2012 GMC Sierra 2500 HD Wiring Harnesses

Genuine GM wiring harnesses for the 2012 GMC Sierra 2500 HD, at wholesale prices. Harnesses carry the exact connectors and pinouts the modules expect, and they change with option content and build date. GMT900 HD through 2014, K2XX HD from 2015 to 2019, and the T1XX HD from 2020.

Signs it is time

Rodent damage, corrosion at a connector, or a repair after collision work. On a heavy duty pickup, trim, tow package and drivetrain each move part numbers within one model year.

Why order factory

• We catch the wrong part before you do. VIN verification is free on every wiring harnesses order.
• Fast out the door. In stock wiring harnesses ship within hours, not days, from Dallas.
• No hassle returns. If the wiring harnesses is not right, send it back.
• Warranty intact. OEM wiring harnesses keep coverage that an aftermarket part can void.
• Wholesale pricing. Most wiring harnesses numbers land well below dealer list.

Making sure it fits

Materials and coatings are specified, not approximated, which is why factory parts last through more heat cycles. Check the VIN before ordering anything that has to bolt to something else. Shipping is calculated on real weight and distance, which usually beats a padded flat rate.