Lurching 40 to 50 mph slight hill

[Dave LV]

Running in the mountains is no problem. I too did a trip in the CO mountains over the fourth and didn't notice it until I can back to town. As noted, it is mainly on flat roads going around 40 to 50 mph with light throttle.

[HummBebe]

I don't remember which thread I said it in, but mine also does this. The shop manager took it for a drive, with me in the truck and duplicated it.

He said he didn't know what it could be, maybe the TC sticking? He said he would have to drive a few others to see if they did the same, then he would get back to me.

I haven't heard from him regarding this, he probably forgot.

[marin8703]

hey i tried to recreate this but i wasnt able to. I was cruising at around 40 on a flat road and then also tried on a slight hill.

I didnt feel any tipe of lurching or anything. The engine felt smooth and held the rpms constant. I had a passenger with me in case i couldnt feel it but they didnt feel anything at all either.

[Dave LV]

So at least it isn't a universal design fault, I hope, based on your experience. Negates GM's "it is normal".

Just wondering, what temperatures were you all driving in? Here in Las Vegas, I kinda wonder if it started in March when the temperature warmed up, and when I was in Colorado it was cooler and not so noticeable.

[marin8703]

when i checked if mine had the problem the temp was around 80 degrees, however here the temp goes from as low as -10 in some winters to high 90s and in some cases over a hundred.
never experienced anything like you are describing in any temp.

[Dave LV]

Well, that blows my idea of high temperature causing it because it definitely occurs on mine at 80F.
Just noticed that I can't turn off stability control with the dash push button.
I wonder if the problems are related...

[Dave LV]

Duh, it helps to read the manual. Have to push the button for 5 seconds, and then a light on the left side goes on, not the button itself. Definitely not related. Unfortunately.

[HummBebe]

Originally Posted by HummBebe

I don't remember which thread I said it in, but mine also does this. The shop manager took it for a drive, with me in the truck and duplicated it.

He said he didn't know what it could be, maybe the TC sticking? He said he would have to drive a few others to see if they did the same, then he would get back to me.

I haven't heard from him regarding this, he probably forgot.

Mine is fixed, Front differential Carrier Bushings.

[Dave LV]

Originally Posted by HummBebe

Mine is fixed, Front differential Carrier Bushings.

Can you provide the part numbers that were replaced?

And where/what are these bushings?

[Hmmm2]

I had a different issue going for 2.5 months. GM/Hummer Corp. strongly encouraged me to go to another dealership AFTER my service dept and Hummer tech (regional tech) checked mine out and said it was 'normal for H3's". I knew it wasn't normal. I also had to resort to GM Corporate Customer Service .. first, the cust. serv. person had to call the dealer to get their thoughts on the problem. When that person told me "it sounds like it's normal for H3's", I asked for the next person in line above her. It was the next customer service person above her who told me that another dealer might have a 'fresh pair of ears' and may have heard of my problem before. He was right. I finally bit the bullet and drove to another dealer who found and fixed the problem in ONE day. It has been 2 weeks and so far, so good. I drove up and down Mt. Charleston this past week in LV and didn't have any problems. I know you have one major Hummer dealer in LV .. are they the only ones available to you? Good luck! Keep us posted! (By the way .. my problem wasn't something normal).

[ChevyHighPerformance]

Originally Posted by Hmmm3

I had a different issue going for 2.5 months. GM/Hummer Corp. strongly encouraged me to go to another dealership AFTER my service dept and Hummer tech (regional tech) checked mine out and said it was 'normal for H3's". I knew it wasn't normal. I also had to resort to GM Corporate Customer Service .. first, the cust. serv. person had to call the dealer to get their thoughts on the problem. When that person told me "it sounds like it's normal for H3's", I asked for the next person in line above her. It was the next customer service person above her who told me that another dealer might have a 'fresh pair of ears' and may have heard of my problem before. He was right. I finally bit the bullet and drove to another dealer who found and fixed the problem in ONE day. It has been 2 weeks and so far, so good. I drove up and down Mt. Charleston this past week in LV and didn't have any problems. I know you have one major Hummer dealer in LV .. are they the only ones available to you? Good luck! Keep us posted! (By the way .. my problem wasn't something normal).

Could you please post what was replaced?

[Hmmm2]

Originally Posted by ChevyHighPerformance

Could you please post what was replaced?

Sorry, I thought you were all probably sick of seeing my problem posted here for 2 and a half months. My H3 had that grind in the rear right wheel area when I'd come to a stop. We live on a hill, so going downhill, heating up the rotors .. the grind would get very noticeable as you'd get to a red light or stop sign. Two and a half months ... all I heard was that it was 'normal for H3's". Yet, no one else I knew with H3's had that problem. After encouragement from members here and the GM/Hummer customer service manager ... I went to another dealer who was at a considerable distance from where we live. The second dealer turned the rotors, replaced front and rear brakes .. put new pads. The service manager told me I had a warped rotor. He found the problem in ONE day and took care of it. Soooo, it wasn't normal for H3's!!!!!!!!!