Hi everybody Im new here, thanks in advance for all your help. I have a 2021 Silverado 1500 LT, Im trying to install a brake controller but Im having an issue, the harness that come with truck in glove box is different than the ones they sell on line. when I say different I refer to the wire location on plug. Im going attach some picture so you can see. The reason Im trying to buy a new one is cause I need it little longer.
Hope somebody knows why they different. every place I check they the same.

Thank you.

 

Or I be better to buy the Factory, the one mounting on the dash. and take it to dealer to have it program. I readed "Factory controller is much better than aftermarket as it incorporates the antilock brakes and stability control system to giver you sway control".

Thank you.

 

Hey JAC,

In my case I have a 2021 GMC Sierra 1500. Which trailer brake controler did you install on your truck?

Thanks