While it is not the job of the seller to educate the buyer, any seller with a hope of gaining repeat business would make sure they have anticipated problems with what they sell and install. Installations for specific trucks come with each and every new hitch. I would return to the dealer and request the installation instructions, after all, you bought everything in the package. If the installation measurements do not match the truck/hitch measurements, the installer may have incurred some liability.
2000 Winnebago Ultimate Freedom USQ40JD
, ISC 8.3 Cummins 350, Spartan MM Chassis. USA 1SG, retired;PPA,Good Sam Life member."We the people are the rightful masters of both the Congress and the Courts - not to overthrow the Constitution but to overthrow men who pervert theConstitution. "Abraham Lincoln"