Most Popular Universal for 2013 GMC Sierra

As always this website rocks! Installation was easy enough thanks to the video.

Great product. It plugged into the trailer brake controller I order just like I hoped it would. The wires were about 14 gauge, nice and heavy. (Better quality than the GM factory wiring that was in my truck.) Each wire was labeled, for example: brake, ground, etc. I am glad that I ordered it. Why? Because if I hadn't, the factory installed wiring in my truck, and the wiring on my brake controller, would not have been long enough. So, buying this product was money well spent!

The harness worked great on my 2009 GMC Sierra 2500HD. The guys at etrailer helped me find the right harness to connect the Curt brake controller I already owned. The customer service is great. I really appreciate how helpful they are.

The easiest way to wire your Curt brake control. It's low priced too. A no brainer. I purchasedt it as a package with the Curt brake control.

Just what i needed to fix someones mistake! This allowed me to replace the factory end on my GMC truck i just bought. The only issue was the yellow wire on the pigtail is for the backup lights and not the left turn signal. I just checked everything with a test light as i went and all was good.

etrailer Customer Service exceeds expectations... they have assisted in advising product uniformity and conformity.. The acquisition of the PK11998 will enable the unit to be returned to a state comparable to its original manufacturers designation. Looking forward to an expeditious installation