Check engine light at 900 miles

[SC-CTV4BLKWING]

Dealer said the code is related to the exhaust valve

More than likely it's the ECM - mine was in the shop 4 times for an exhaust code - the dealership called in a GM engineer twice, first time they replace something having to do with the manifold - worked for 1-1/2 months - threw the same exhaust code - figured it was most likely the ECM, changed it out and so far so good.

 

[VSforever]

It was indeed the exhaust valve this time. They replaced it and now it seems ok. He did tell me if it comes back on again they'll likely have to replace the whole exhaust.