2011 GMC Sierra 2500 HD Wiring Harnesses

Genuine GM wiring harnesses for the 2011 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.

Symptoms to look for

Rodent damage, corrosion at a connector, or a repair after collision work. On a heavy duty pickup, single or dual rear wheels, gas or diesel, and cab configuration divide this group more than the model year does.

What sets these apart

• Returns without a fight. We would rather fix a wiring harnesses order than argue about it.
• Covered by GM. On wiring harnesses that coverage is worth more than the price gap.
• Real wholesale. The same wiring harnesses your dealer sells, at a fraction over our cost.
• OEM, not lookalike. With wiring harnesses the difference shows up on installation day, not in the photo.

Ordering correctly

Genuine GM parts carry the factory part number, so supersessions are documented rather than guessed at. Run your VIN first. One vehicle can list several nearly identical parts and only one is correct. Because we ship centrally, a heavy part costs less delivered here than from a coastal seller.