I found a few websites while looking for info on our new 'Burb. Thought you guys might find them useful:
http://www.gm-trucks.com/
Look at the very top of the page for RPO Decoder.
http://www.compnine.com/index.php
click on research and it has a RPO and VIN decoder.
http://www.gm-trucks.com/
Look at the very top of the page for RPO Decoder.
http://www.compnine.com/index.php
click on research and it has a RPO and VIN decoder.