Need Advice - 2018 Yukon Denali - needs new engine

[fasteddy]

Bro, where do you live? Are there no good private shops around? So your status is currently with some unknown dealer at $16K down from $22K? Thats closer. I would park it at your house and shop from there.
The price of a new GM 6.2 engine is not going to change. 10K for crate, 7K for long block WITH DOD, which I hate (I would NEVER put that back in my vehicle). If you want to stay stock with DOD then you need to find a shop who can R&R the engine.
It's not that much work (about 18-24 labor hours depending on mech), but you also have several hundred in plugs, oil, and coolant. If long block then you would also need injectors, rails and piping because those injectors never come out easy, they always break and need to at least be rebuilt, easier to buy new, which is the case with the whole engine, easier to buy new. And the whole engine is warrantied. All assuming your current engine is broken beyond repair. You never said what was wrong with it. Buenos Suerte!

 

[fozzi58]

As a mechanic for many years, I had a customers car towed into my shop for a no start condition. I quickly tried cranking it over and could see almost no movement from the harmonic balancer. I told him it had probably seized but I would look into later when I had the time. It turns out the alternator was locked solid keeping the engine from turning. It's hard to believe how much torque a serpentine belt can hold without slipping! If they haven't taken a deep dive into it I wouldn't trust them. Another example of dealer dishonesty is when I took a part time job as a Napa driver after I retired and in my late seventies. The Dodge caravan I was driving started slipping in reverse and popping out of park. I told the store owner it was because the outer cable had come loose and instead was sliding out of the crimp keeping it from pushing the the shift lever on the trans but allowing it to pull it into the forward gears. The Napa owner sent it to the local Dodge dealer who told us the trans was shot AND it also needed a new engine! That's as bad as many dealers can get.

That happened to my wife old Buick Enclave. The alternator seized and locked the whole motor up. Lost power to the whole car and couldn;t even put it in nuetral to have towed. They had to "rock a by baby" the car up the flatbed.