Try removing the top over the burners. If it is like my Dometic, you will then probably find two screws per side that are screwed into the cabinets. Remove the screws, turn off the gas and undo the gas line you will find under the burner cover. You should then be able to pull it up slightly and out. Good luck!
This website is not affiliated with or endorsed by the Airstream, Inc. or any of its affiliates. Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.