On '04 models, there should be an access hole thru the footboard of the bed. No need to remove any cover. Also, in theory, no need to lift the bed. However, the handle length of the CR supplied crank is too long to completely close the bedroom s/o. So, you will need to use a socket and rachet or other wrench.
Texas Baptist Men-Retiree Builders member since '01
13 Silverado 3500HD D/A, 2wd CCSB srw, custom RKI bed
11 Cruiser CF32MK