GM Repair Problems? Ask GM Repair Expert Now.
How many miles now?
This issue could be anything from plugs, carbon buildup, injectors, valve lifter failure etc.
To have oil pressure sensor codes AT THE SAME TIME as the misfire codes is not a good sign.
Needs a more thorough diagnosis from a GM technician.
With some small misfires, they are more evident at idle low speed, and less evident once driving.
Worst case scenario is replace engine, from when roller lifters rotate and damage the camshaft etc. The metallic failure goes through the oil pump.
I've seen some that log codes for individual cylinders, then pull the valve covers and observe said valves inoperable.
I would let a good GM tech local to you perform some further diagnosis.
I hope this helps.
Yes, it could be something simple.
But with 200k on it now, it thought it best to tell you some bad scenarios.
I would book it with your local dealer, some diagnosis from them will let you decide on which path to take.
Hope this helps.
Do you need any further help?
I hope my advice has been of assistance to you.