7th Jan 2013, 09:44

My 06 H3 with 71,000 miles has a cylinder 5 misfire, and I already replaced the plugs and coils, rebuilt the radiator, had a brand new transmission put in, and now this... Does it ever end! Called GM and it's gonna be $2200 to replace the cylinder head. Let's just say I'm not very happy with this company. No wonder why they don't make them any more!

24th Jan 2013, 16:04

I have a 2007 Hummer H3 standard package.

At 65,000 miles my main computer went... I have a full warranty through Guardian, and this item was not covered.

At 66,500 miles my heater blower quit. This also wasn't covered through my warranty.

At 69,000 cylinder #2 quit working.

Are these Hummers notorious for problems? I love mine to death, but I am tired of dishing out $$$... Thankfully this time my warranty covered the valves and head job, totaling $2900... but the dealer insisted at first that I do a fuel injection service, which makes no sense to me...

11th Apr 2013, 08:13

I purchased a 2006 H3, not from a GM lot. Now I'm having the same problem everyone else is having. I've been contacting GM; they won't do anything about the problem. This is a old post by now (2013); enough of these have gone bad, so where are we now?

22nd Apr 2013, 07:56

I have a H3 year 2006 with the same problem; #5 misfire due to the intake valve seat failure - engine cylinder. It should be a recall on the parts for all H3s to be fixed.

14th May 2013, 14:18

Hello, my name is Anthony. I live in St. Louis MO.

I also have a 2006 Hummer H3, and I replaced my radiator, and now I'm having a misfire on cylinder #3. I had the plugs replaced and #3 coil. Only have 100,234 miles. You can e-mail me at eveenvno1@yahoo.com. I would like to also get with you on the law suit. Something needs to be done about this.

Thank you.

20th May 2013, 23:32

I just bought an 06 H3. Less than 4 days later I took it back to the dealer I bought it from. They told me that they took it to the GM dealer and found that cylinder 3 had a misfire and needs a new head. They told me they will only cover 50% of the work, and I have to pay the other 50%. If anyone started a lawsuit already or knows of one, please let me know. GM should at least have a recall on this or a service warranty extension. I know Toyota takes good care of all their customers. Contact me if you can help at schiwa.yang@gmail.com.

27th May 2013, 21:48

I also own a 2007 Hummer H3 that is currently in the shop getting the cylinder heads replaced.

When the issue started, it kept showing up multiple misfires. After spending $3000.00, we thought the problem was fixed. One week later the same problem came back. Now that it is back in the shop, it is going to cost another $3000.00-$4000.00 to get it back up and running.

I am going to contact GM tomorrow to see if they will help with the issue, where this is a very common problem. If they offer no assistance, I think that we should go national with this issue. Do as many class action lawsuits as everyone can. Also, the GM dealer is a rip.

Anyone doing a lawsuit, or wanting to do a lawsuit or something about this problem, can email us at jessica4774@live.ca.

5th Jun 2013, 17:02

I have an 2006 H3, and for the last couple of months my oil pressure light has been coming on while at the idle position. I was told the problem was difficult to diagnose, because it would not duplicate once at the dealership.

Finally, duplication of the problem occurred and I was told it was my ignition switch, so I paid $370 and that was not the problem. Now I am being told that the problem is my oil pump and switch, costing 2180. I am at my wit's end, and don't know what to do.

In addition, every so often I am getting a misfire code, even after having the coil packs and spark plugs done. I just don't know what to do at this point. Does anyone have any suggestions? After reading all the comments, I don't think it is a good idea to let them fix what they are not sure of.

8th Jun 2013, 11:11

I have a 2006 H3 with less than 45k, bought brand new, and have had many problems since the warranty ended. I am interested in joining your class action suit. I can be reached at email raidersisbomb13@yahoo.com.

Look forward to hearing from you.

1st Jul 2013, 10:03

Hummer H3 2006.

I have the same problem.

Misfire on #5 cylinder. Exhaust valve seats are bad and need to be replaced by harder seats in the same material like the valves.

If the seats are in a different material than the valves, the problem is gonna come back.

11th Jul 2013, 07:15

Have a Hummer H3 2006, with 146500 miles.

Have a problem with the radiator, A/C, outlet power all out. Also the engine needs to be replaced.

Sunroof glass got loose.

Problem after problem. Please let me know if anybody is forming a lawsuit.

estherluis@ymail.com

Thanks.

15th Jul 2013, 16:57

I have a 2006 Hummer H3 - less than 100K miles - same issue.

By reading the above comments, we have enough people to start a law suit and get some national media attention on this. Don't let GMC continue to take advantage of customers.

This is a known issue, and they are not taking any of us seriously.

E-mail me dwilson2920@gmail.com

15th Jul 2013, 21:37

PLEASE, PLEASE RECOMMEND YOUR LAWYER TO ME > more9104@mail.chapman.edu

I am having issues now; just when I finished paying for this garbage GMC H3 = BIG RIP OFF!

I made a big investment, hoping my family would be safe on the road with me. NOW I AM DRIVING ON BORROWED TIME!!

PLEASE REPLY ASAP!

THANK YOU.

15th Jul 2013, 22:03

Jessica,

I am shocked to read about your out of pocket expenses. GMC is to be held accountable for this problem ASAP.

I want to join efforts, because my engine light comes on all the time, and I do NOT want any repair expenses on this car that ONLY has 89000 miles.

MORE9104@MAIL.CHAPMAN.EDU

26th Jul 2013, 17:23

Wow! Just replaced my cylinder head #5... Then the exhaust manifold cracked and the transmission blew! All in one month.

Class action, I'm in...

30th Jul 2013, 15:42

Can you please contact me, I would like to hear your advice - I have a similar issue and would also like to sue GM for this issue. Please let me know if you could graciously share any advice on how you went on with suing them.

dwilson2920@gmail.com

17th Sep 2013, 11:33

I was wondering if anyone started a lawsuit. I am currently having engine issues and I'm not sure what to do. I have a 2007 with 80,000 miles. Please contact me at nataliehart64@yahoo.com

20th Sep 2013, 09:03

I'm in the military, and up until I hit about 85,000 miles I had NO problems with my 2006 H3.

Once I had the SAME issues as everyone else; #5 misfire ($2800)... Also had to have the radiator replaced ($400); both were while I was under 100,000 miles.

As soon as I hit 100,600 miles (this week) my A/C stopped working; the resistor and harness burned out; another $300.

Please contact me in regards to the lawsuit if anyone has started one. I would like some of my hard earned money back.

I am extremely irritated and wondering if I should trade my car in now before any other big issues arise. THANKS. My email is courtney_llovett@yahoo.com