It's a simple math problem. What's it worth non running as is? Maybe $2000?
What's it worth after spending $8000 on an engine?
What can you buy another used one for?
Without knowing the numbers, I would take the $7900 and sell the rest for...
All of the GXs dating back to 2003 have lots of electronic gadgets but all of them are highly reliable. There really aren't any bad years at all. If you can afford it, I'd pick up a 2022-2023 GX460 with the upgraded infotainment system and center...
Go to the Better Business Bureau, they're free.
Try Valvoline headquarters, stop dealing with the franchise, go up the headquarters chain, don't believe the first person you talk to unless you get a new motor.
A lawyer is unlikely to take it on...
My bet is tires, it could even be the tire pressure. I have a good friend who trusted the dealer to service his vehicle. Every tire had a different pressure, some 30 pounds different. Imagine your handling if one front tire had 60 pounds and one...