2001 GMC Yukon XL (Aka Beast)

[Fless]

What diagnostic trouble code(s) are lighting the lights?

 

[makintoshnex]

I ordered another harness. It may be that my GMC is using same harness as for the left and right side. I tried to switch them they fit. The tiny thumb on right harness is same as for the left one. I found cheap one new from 2000 GMC Sierra 2500 for 35 bucks. We'll see. So far left turn signal doesn't work. I swapped old taillight back. I tried to fit the new wing from Escalade. Did some custom brackets. Need to wire it.

 

[makintoshnex]

The biggest issue is that I'm doing everything on a street. I have no garage or driveway. Those holes for spoiler I will fill in with window seal . I can't weld plastic, got no tools for that.

 

[Bigburb3500]

The biggest issue is that I'm doing everything on a street. I have no garage or driveway. Those holes for spoiler I will fill in with window seal . I can't weld plastic, got no tools for that.

I feel you on the street work. Did all my work in a parking lot or at the local AutoZone.