My 2008 CTS recently hit 100,000 miles (February) and started throwing an engine code which came out to my timing chain needing to be replaced. GM was good about this known issue and took care of the $2,000 job with no cost to me. Bummed that it needed a new chain, but its awesome GM admitted an issue and took care of it.
Here I am 2 weeks later and the car stuttering and sputtering from cold starts. I take it in to the dealer and am told there is oil in cylinders 1&6 due to bad heads. According to the dealer the aluminum in the heads is so porous that its seeping oil. The repair cost comes out to $5,499 which will not be covered.
I've taken the car to the dealer several times for oil consumption and was told nothing is wrong. Now just after 100k the dealer is telling me everything is wrong. Between the 2 repairs that will mean this 2008 with 100,000 miles will have needed $7,500 in engine work for problems that they are admitting are poor quality parts.
Does anyone have any input or advice in this issue? I just bought new wheels for the car and did $400 in preventative maintenance during the timing chain repair, I would hate to just dump it at this point.