SavageSam--Having read all of the posts here, try getting specific with them (GL) as to why they want it back; perhaps you could find the specific item and gut it out of the truck and "render" it to them. IMHO you would be entitled to any funds you have put into the truck (what you got in it) as a condition of returning it, if it came to that. Feb to Oct is over 6 months, and much too long to activate what is known as a 'condition subsequent' to a contract, without recompense for your improvements to the truck. If you really like the truck, don't feel overburdened by what you perceive as the government coming at you...dig in like a tick. I thought Carnac's post humorous, but hey, he's right.
As a side thought, and hypothetical.....what of the guy who buys from GL, transfers it to another bona fide purchaser who is not in privity with GL. Think they (GL) can come get a truck from that subsequent purchaser? I think not. For what it's worth.