Doubt that it would matter how many trucks they purchased......I have worked for a couple dealerships...one was crown/Toyota and current is Nissan/CAT.....at both places I have had a couple LARGE customers and never was they allowed the software or cables or any other PROPRIETARY info to access the computers/software...when anything needed to be done it was up to the dealership to do the work...besides most diagnostic software anymore needs updated regularly or it won't work