[bobcowan]

You'll need a VIN inspection, that's it. Ask the DMV in your area where to get that done. Used to be all the smog check stations did it. Now there are not many smog stations around. Diesel engines still need a smog check. Places that do that can usually do the VIN inspection.

No smog check for gas engines outside of Denver. If you regularly operate a vehicle in Denver, the law says you have to get a smog check.