P0302 Engine Code

[H2Much]

So, started up my ride yesterday and got the check engine light. Pulled the code and it looks like the P0302 2nd cylinder misfire. So, mechanics out there, I run Chevron premium all the time. I had the plugs changed about 10,000 miles ago and I am pretty sure the wires at the same time. What else should I look at doing? I know that it could be several other things, but I am wondering what I should trouble shoot first based on the fact that I already run awesome gas.

Thanks in advance for any input.

[jsbihn]

Could you explain to me how you pulled your code?
I havent found anything on the web to explain how to pull and rest codes on my '03 H2

BTW,
If I am wrong, I am sorry, but I believe these engines are very similar to the engines in my Vette, so if thats the case, I would check the ignitor / ignition coil pack.

[H2Much]

I have a handheld code reader that I pull them with. Thanks for the tip too!

[HUMTECH]

swap ignition coil with another cylinder and see if misfire follows coil. Make sure plug wire is fully seated on plug have seen them come loose after plug replacement as much as 20000km after they were done

[H2Much]

Thanks as always for the good info Humtech. Yah, this thing has been on and off for the last few weeks, comes on, goes off. I have checked wires, plug, etc., so I am thinking I may need to replace the ignition coil on this thing. Another $100, down the drain!!!

Question for all of the smart people out there: Why did Hummer decide to go with cheap stuff on their what used to be $70,000.00 trucks? WTF?

[H2Much]

Still having the P0302 code firing. Tried several things thus far: swapping plugs, swapping wires, replaced the coil on Cyl 2, still popping the code!! On top of this, not feeling any knocking at all or misfire while driving. Getting fed up, sick of this- Could this be a sensor? What else could it be?

Any help anyone can provide me on this would be great as my mechanic is out of ideas too - thanks.