Diesel exhaust fume in cabin of 2003 Fleetwood Excursion

What were the terms of the sale?
Any warrantee?

I purchases a used MH from a camping world some years ago.
They gave me a full PDI, showed me how everything worked, agreed to fix anything that didn't work.
I came back after they had done so, had another full PDI, verified the work was completed.

Then I paid them.

And they made it perfectly clear that any warrantee was up when the rear bumper cleared the parking lot curb.