Was wondering if anyone had similar issue. At about 62K engine started running rough--luckily was taking it in for routine oil change that day. Dealer called an hour later and they replaced the whole engine! Now I have 62K body and trans, with a new engine.

 

How rough?

 

Sounds like this came on without any other symptoms?

Any idea what the final diagnosis was of the problem with the engine?

 

The idle was rough like one cylinder missing. My wife normally drives it, so there possibly could have been some symptoms she missed. I simply told her the night before that it was time for an oil change, so I gave her my car in the AM.
Did not get a thorough explanation as to the cause, just something involving cylinder #1. However I was out of town for the next two weeks. I will try to get a more thorough answer.

 

What kind of rough?

 

A rough idle like one plug was fouled-normally a very smooth quiet engine, but as soon as I started it, I knew it wasn't right. Wasn't putting out any smoke though. Got up to speed ok, but I didn't push it--probably drove 30mph verses my normal 45-50.

 

Did the Check Engine Light come on?

 

No-there were no warnings that I saw. I do have to add that my wife usually drives the Yukon--usually I get the statement:"Something's wrong with the car"---which translates to a range from the gas is low to she just hit a deer and caused $10K damage.

 

I know the wife story well. "There's a noise". Anything from an animal under the hood to severe grinding brakes.