Took my 2012 Sierra into shop yesterday; running rough. Cylinder #7 plug is oil-fouled. I found out this is an issue with this engine.
136,000 miles, truck is in excellent condition(otherwise); not covered under warranty. I was hoping to get 230,000-250,000 like my previous trucks.
Do I spring for a new engine, or trade truck to a dealer or ...?
Just asking for some thoughts, thanks