4 bolts and a little man power to adjust if referring to the typical LCI twin rail through frame slides. Have owned a few that needed that adjustment.
John and Rebecca Dickson
Emma-8 / Little John-5 / Iva-1+
2013 Ford F-350 Lariat FX4, CC LB PSD, DRW
2015 Jayco Jay Flight 28BHBE (#8)