You need to disconnect the chassis grounds and unplug the ECMs such as from the DDEC and transmission.
If your hitch is intended to carry 1000 pounds or greater 8″ from the bumper (or a lesser amount as the distance from the bumper increases) you need to be aware of the Prevost weight limitations which should be on a plaque attached ot the current hitch.
Failure to observe those limits is likely to result in cracking and structural failure around the engine cradle. Owners who have pulled trailers in excess of the tongue weight or towing weight limits, or have installed motorcycle racks have damaged their coaches in this manner.
Prevost makes a 20,000 option but I don’t know the tongue weight limits.
Jon and Di 2006 Liberty Elegant Lady, 2021
Jeep Grand Cherokee, 1950 Ford
Knoxville, TN
Owner of three Liberty Coaches since 1990