2012 GMC Sierra 1500 Wiring Harnesses

Genuine GM wiring harnesses for the 2012 GMC Sierra 1500, at wholesale prices. Harnesses carry the exact connectors and pinouts the modules expect, and they change with option content and build date. GMT900 through 2013, K2XX from 2014 to 2018, and the T1XX from 2019 with the CarbonPro bed option.

When you need them

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

The case for genuine GM

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

Getting the right part

When a component is superseded, GM documents why.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.