trailer brake controller on a 95 yukon

[Backon4]

Are these a direct plug in or do these have to be wired? If it has to be wired how difficult a job is it?

 

["350Vortec"]

Are these a direct plug in or do these have to be wired? If it has to be wired how difficult a job is it?

They have to be wired, And as far as i know they are not that difficult. I helped a friend do one in an old S10

Actually i just found out that they sell plug and play ones. I dont know to what extent the plug and play is but there out there.