You wouldn't notice a BIG loss in power from just one cylinder losing compression. You will notice some power loss though. I'd suggest you take it to the dealer if you haven't already.

 

I don't know anything about cars. They said they have to take head off tranfer rockers?, cams, adjusters and bunch of things to the new head. Are these parts of a new head? Im lost lol. Nevermind, it would be a waste of time, I know nothing. I'm not worried, the guys at this dealer are great. It may even run better than it ever has eh?

 

How many miles did you have on your Hummer when you started having this problem?

 

It was just after 2000 miles but I think its been idling rough for like 500 miles. I thought maybe was the cold weather.

 

Yes I'm sure they will tranfer those upper components, along with the Injectors and sparkplugs

 

Do you know what the date of manufacture is for your Hummer?

 

02/06

 

On the top corner of the label inside your driver's side door jamb is the month and year of manufacture. Double check it and let me know...I'm trying to keep track.

 

Even worse. 02/06.

 

I wouldn't put anything past a salesperson. Make sure you get it fixed and call about getting an extended warranty. My H3 was made in Jan of 2006 and I purchased it in March which is about right. It usually takes anywhere from 4 to 8 weeks for Hummers to get to the dealers from the plant. You canfigure that your Hummer has been at the dealership since April (probably).