I have the same problem only in cylinders 2 and 3, has anyone found a remedy for this problem yet?

 

UltraMagnus86,

I realize you're after a do-it-yourself fix on this, and I hope you're able to get this resolved! If you decide to work with a dealership towards diagnosing the misfire concerns you're having, please be sure to let me know as I would like to assist in whatever way I can.

All the best,
Sarah
GM Customer Service

 

My car does the same thing..misfire on 3 on a cold start...I work at a dealer so I been messing with it..already switched plug and coil..skip still on 3..I'm just going to call GM tech assist soon..ill let you all no what they say and if it fixes it
finally got around to calling tech assist and was told it could be a sticking valve or an injector..they have had a few cases where injectors fixed the skip..i already ran a full can of gm upper engine cleaner with no results..so i ordered an injector and gonna put it in soon..hoping this does it...

 

update..got all the injectors changed but dont think that was the problem..once i had the intake off i saw all the intake valves had tons of carbon on them cleaned them all off and so far light did not come back..no clue as to why there was so much carbon..