will they fit on 2000 trucks? Got some for $50.

 

Yea they will fit but you'll need to change some wiring to make em work, unless you got the harnesses

 

yes they fit, just like the 2003 will fit as well.
go get the wiring harness from the dealer or splice and dice the wires...

 

I just matched up the colors and used one of the sierra's black grounds, very simple to wire up if you dont want to buy the harnesses

 

You do not need to buy a wiring harness unless you want the small bulb that the 99-02 tails do not have.
I just trimmed the new taillights a little so that the bulbs on the stock harness would plug in, and they work great.

 

Exactly what I did!