04 - 06 sierra tails on my 99

Just a quick question guys, i did a search but couldn't come up with a definate answer.

I have a 99 sierra NBS with a crappy set of euros that just have to go. I'm ordering a set of new style lights from the 04 - 06 sierra from LMC truck and noticed they offer new harness's to go with the lights.

do i need these ? if so will they just plug into my existing junction box ? or will i have to replace it as well.

Would definately appreciate any advice on this subject

thanks in advance

Dan.

Yes, you need the harness and yes they will plug into your existing junction box.

You can also splice in a new connector to your existing harness.