I had 2 more H3's come in with misfire codes and ordered heads for them. Larain60 let me know when you get yours in. It's bad enough I have to tell someone that there cylinder head needs to be replaced But this backorder situation makes it that much more harder to explain. Steve

 

How long of a wait is it for the new heads? Is the head the only part that is defective in the engine? Are Hummer dealers providing loaner vehicles? Do you think this problem will become a little more widespread?

 

Hi all, I got a voicemail from my H3 dealer today. They said my H3 header was replaced and ready to go.

They backordered my part on Jan 10 and Im thinking it took them 2 days of work, so maybe a little less than 1 month on backorder.

Also understand that I was told by GM case manager I was 32 on the list to receive them and they have 1,100 of the headers on backorder. So Im not sure whether 1100 people on the list (doubtful) or thats what they anticipate having to replace (more likely) over time or within the VIN range.

In any event Im going to pick up my H3 tomorrow and Ill update you all then.

Good luck.

 

Count me in as one of the many head replacements. My dealer estimates two weeks for the head delivery and two days downtime. My head issue is the exhaust side, so I can still drive it. Mine occurred at 26,500 miles. Other than that issue there were only three other problems. Noisy marker lights, service 4wd light (turned out to be a chafed wire after 4x service trips) and 4 broken plastic clips holding the luggage screen. Otherwise I really still do live the vehicle!

 

Yeah I think I could live in mine too..LOL..welcome

 

Service update:

Head replaced and the engine now purrs like a kitten. Power and accelleration seems to be much better than it was the day I bought it new.

My dealer came through big time, and Hummer too. Going to shoot for extended warranty.

Im glad the Hummer case manager talked me off the ledge when I was waiting for weeks for the part.

Good luck all.

 

Glad to hear you're back in the good to go mode again..

 

Glad to hear it. Be sure to let us know how the warranty thing works out

 

And good luck to you as well! May you continue to love your little Hummer and have no more real probs with it! On the warranty thing, I found it was key to be consistant with those calls - until you have that LETTER in your hands!

 

H3X - Do the misfire codes produce regular OBDII codes? I bought one of those fancy shmancy OBDII code readers that I've used on my friends Explorer but not on mine yet. It has the Database code summary built in.

The reason I'm asking because I've been having some suspicious conditions the past week or two. I got a new belt tensioner and belt two weeks ago. Since then (also when the temps dropped from 35 to 0) I have had a few instances (this morning) where the car started to sputter and the idle dropped to about 400-500. It's been happening every couple of days. The belt is fine, the tension is fine, but I'm starting to wonder if I'm getting this now. I have 30k on mine and the manufacturer date is Oct. '05 It's starting to worry me.

Does a misfire cause the Check Engine light to come on, or only produce a code?