Any one else having this check engine light?

[Hummergyrl]

There is a known issue/bulletin out on this issue for P0300 thru P0305 Emissions misfire DTC. You will get a Check Engine Light and may or may not experience rough idling. *Some* VINS under 287591 have these parts that were machined wrong or something and need to be replaced. The new parts contain harder intake valve seats to prevent intake valve wear and leakage.

This happened to me last week. My H3 (7,500 miles) had been idling a little rough for a couple weeks and then got the Check Engine Light. Onstar diagnosed the DTC and said to go directly to the dealer. The dealer replaced some intake valves and the cylinder head. Runs great so far. Sad to see my brand new H3 with the motor torn apart though.

Nothing to do with gas folks, get it fixed asap!