Welcome to the forum, we had a 2008, should be 8' for the main body and 3' for the drivers side, slide, 11' total. Remember to position the 5er with consideration of the pedestal: Forward or back for the slide clearance, the cord length to the receptacle, sewer connection, water connection, clearance for the bedroom slide (tree branches etc.), awning deployment, position of the entry/exit steps, site grade. Fill yer boots!
Married To The Navigator
2005 Red GMC Duramax 4X4 HD Crew Cab
4" Magnaflow, Banks Air Intake
Firestone Ride Rite Air Springs