Honestly, you are spinning your wheels. I had a much more clear cut situation - and was very polite with GM - and they were very "nice" with me - BUT - nothing worked because even when an arrangement was made, the dealer would not cooperate. They would not even give me the parts for me to do cam, lifters, headwork, fluids, gaskets myself!
My issue was an AFM situation where dealer didn't follow TSB change and new program needed for PPV's. In reality GM was not even at fault, since dealer ignored TSB. But that dealer sold (or was forced) out, so new management wouldn't budge. GM even offered an unreal deal on a new one, but dealer refused to "execute" by locating a "Brass hat demo PPV" because they were afraid, maybe I would not want it-despite offering payment in full for the greatly reduced price - and a 100,000 mile warranty - in advance.
I had to revert to the Courts-AND IT WORKED OUT BETTER THAN GREAT (not allowed to disclose $$ number
) The truth prevails.
YOUR ISSUE IS SIMILAR, AN INCOMPETENT DEALER - NOT EVN GM!!
I intend to take it up to the State level, EPA, small claims court, Florida Attorney General, etc. "Polite" ends at close of business today.
After 23 years in Real Estate and Mortgages (last 11 spent working with ALL the major Lenders , working with foreclosed owners and then dealing with countless evictions, local sheriffs, opposing attorneys, code enforcement, permitting, etc) I know a LOT of options that I can take to make Dimmitt Chevrolet miserable.
Had a pool contractor walk off the job with $2500,and after I was done with him, he's out of business, had to pay me and another customer back their deposit, and got a fine and ban from being licensed in Florida for pool work, and spent a nice weekend in the Big House. Turns out he was not licensed in my county, so even after performing some work before walking off my jobsite, he paid back every nickel AND a nice hefty fine. So I hope for both dealers and GM, that this is handled. (Small Claims court is $275 to file a case, just Dimmit's attorney fees will exceed my $1675, and judges definitely frown on dealers preying on consumers) Attorney General and EPA will be their worst nightmare.
State Licensing Board will probably drop in for a compliance audit, hope all their trade-in titles are in order(they won't be, I worked a few years selling used cars, lol)
Whatever the end result is, Dimmitt Chevrolet will be out far more than $1675, on top of BBB, Yelp, Facebook, and every other negative review that is humanly possible.
Hiring a lawyer is probably the worst possible outcome for Dimmitt, if I go that route, I will be relentless.
Hell, based on GM knowing the AC's are faulty and extending the warranty to 5/60, might even be an interesting case to present to a Class-action law firm I know in Tampa Bay. THAT would really be interesting. And free to me to be the Plaintiff.