same problem on a 03 Alero 3.4L
Hey guys I am looking for what to do after you check: plugs, wires, coil packs, fuel filter, air filter, and injectors. I have also had a recent trans flush.
I have the same symptoms and I get a 306 code, multiple misfires on no. 6.
Any suggestions are welcome and appreciated. Thank you for your time and consideration.