Dealer? Nope. Private sale? I'd let the buyer know about significant issues.
I didn't tell the dealer about the evap leak and the intermittent cam position error (the telltale sign of worn timing chains) on my Traverse when I traded it. I did have to tell them how to cover up the daylight sensor to get the failing odometer display to work again to read the mileage though. Couldn't hide that unless I traded it in at night. Fortunately the CEL stayed off during their test drive; I had filled the gas tank knowing that the evap test won't run while the tank is full, so no CEL for the evap leak. Crossed my fingers the timing chain code wouldn't show up on the way there or during their test drive. They could have easily plugged in a scan tool and found the lingering evap leak code and that the CEL had been cleared recently. I think they would have figured out from the evap leak code that it wasn't going to pass e-check without some repairs, which is why I was getting rid of it. Just so happened the timing chains were going to be a very expensive repair.
I didn't tell the dealer about the evap leak and the intermittent cam position error (the telltale sign of worn timing chains) on my Traverse when I traded it. I did have to tell them how to cover up the daylight sensor to get the failing odometer display to work again to read the mileage though. Couldn't hide that unless I traded it in at night. Fortunately the CEL stayed off during their test drive; I had filled the gas tank knowing that the evap test won't run while the tank is full, so no CEL for the evap leak. Crossed my fingers the timing chain code wouldn't show up on the way there or during their test drive. They could have easily plugged in a scan tool and found the lingering evap leak code and that the CEL had been cleared recently. I think they would have figured out from the evap leak code that it wasn't going to pass e-check without some repairs, which is why I was getting rid of it. Just so happened the timing chains were going to be a very expensive repair.
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