I had this same problem about 4 months ago. Took it to a Struts specialist as my dealer is over an hour away and could not drive it that far. It started with a persistent squeak when cold. Then started making a swishing noise while driving at any speed until finally it made a horrible loud squeaky\grinding noise. I pulled that drivers front tire every 2 days while trying to figure out what is it was until i couldn't think of anything else. The begining noise sounds almost like the brakes need to be replaced. The part cost me about $385 and I walked out with a $500 bill, not bad i guess . My problem is it just started again 5000+ miles later - not good!

 

wow, I just had my wheel bearings replaced, and what a difference. Its a completely different ride. (2003 H2 80,000mi) 4 months left on my extended warranty. That warranty was well worth the money, its paid for its self plus some!

 

I changed out my hub assembely and now im getting the service brake system code

https://www.hummerforums.com/forum/s...648#post206648

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Glad to see your warranty covered it. Mine has been out of warranty as i have about 115k on mine- should be smooth sailing for you now. Just remember the feeling incase it comes back, but I wish you luck.

 

Hello everyone,
i was the one that made the post telling everyone to check your wheel bearings... they are the cause of lots of Noise, Alignment, Vibration, Tire wear issues that everyone seems to be posting about latly.
Replacing your bearings is not that hard theres a couple posts on here with basic directions they key to the job is having the proper tools... Dont be cheap and do just one side. And If everything is already apart do yourself a big favor and put new CV shafts. These trucks were designed to be repaired rather easily. If your good finding things on the internet theres detailed instructions from GM floating around that my German Shepherd could follow and she speaks Czech.....
Im sure theres a couple of us Here that could walk someone thru the process i know others have done this and posted about it in the past. use the search option.

 

The wheel hubs really are not to hard to change out at all. I did both of mine at 75-80k Miles. I figured maybe 1 hour each side with hand tools.

 

does anyone know how long the wheel hubs last on an average?

Should you want for this problem to come or just go ahead and replace them whenever you hit the average time?

 

Mine just started squalking a bit when cold. Now their talking a bit when driving straight. Always thought it was my allignment but after a tire rotation and front end alignment, i found out the real culprit. Bought two from Mac auto on ebay for 200 bucks. Lifetime warranty... hmm wonder how long Mac will be in business haha. Will be putting them on soon. Doesnt sound hard at all except maybe the torque specs. Anyone know the torque specs off hand. Ill do a search. Great thread!

 

There are many things that can go wrong with the front end of the H2. Remember the IFS on the H2 was orginally designed for a 2500HD truck with much smaller tires.

Even the 35" factory tires cause all front linkage to wear faster on an H2 than a 2500 truck. The H2 weighs 1500lbs more than a 2500 as well.

Hubs are sealed units and have to be completely replaced and are non serviceable. In short you cannot pack in a new bearing for just $15 (unless you own a machine shop).

Depending on the mileage of your truck I would also check your ball joints, tie rods, pitman and idler arms. There is nothing in the front of the H2 that won't wear out. I have replaced EVERY SINGLE PIECE of linkage in my front end over the years. I now have 103K on the clock. My truck has had 37's on it most of its life. I also off road the **** out of it.

The prices you are beeing quotes sound legit. A hub from the dealer will run you roughly $400 for the part plus labor per side.

Aftermarket hubs can be had for between $175-$275. Find one with a lifetime warranty if you can. Reason beeing is you will be replacing these on your truck again. They are typically the first thing to go in the front end besides the pitman and idler arms.

The job of replacing them is technically very easy. However is physcially demanding. Make sure you have a nice long breaker bar, a set of 1/2" sockets and a large torque wrench.

All you need to do is remove the tire
1. unplug wheel speed sensor and remove the wire from the fasteners while leaving them attached to the control arm/frame components.
2. remove bolts from brake line brackets.
3. remove brake caliper from the knuckle-only 2 bolts, big ones and they will be a bitch to get out
4. remove 36mm nut from 1/2 shaft
5. remove out tierod from knuckle-this allows movement in knuckle to work easier
6. remove 4 bolts that hold hub to knuckle. They will be a real treat to remove as well.

7. Repeat process in reverse and use lock-tite on everything make sure you torque all bolts to specs.

 

had the exact same issue-i replaced the hub bearing dealer wanted a g'plus i bought the hub assembley/bearing for $185 at checkrs and runs like a champ now-

front wheel hub bearing

http://cdn3.ioffer.com/img/item/140/...yZcgeEvc2k.jpg