Need Used Parts

Can anyone direct me to used parts for my 2004 Colorado? Also, what newer years will fit my '04?

You could try www.car-part.com. You enter your vehicle's info and select from a list of the part s you need and are taken to a results page of salvage yards across the country that have the part in stock. It's kind of like a parts locater that salvage yards use where they are all linked together, You can even refine your search to yards closer to your location. The results page usually have the yard that has the part with contact info, the color and condition in most cases, and whether or not that yard ships parts out to customers.