I don't have a part number, but I ordered them from member ZSpot on NAIOA.com

Usually I'm a fan of GM direct's web site but today I've discovered GM Giant. They actually have live chat when you go to their contact page. However, the guy on the chat site wasn't the part specialist. But you can submit a request to a parts specialist. Their customer service is lightning fast compared to GM Direct. So good! I found out the part number for the bolts if anyone needs is #11570580 I'm going to purchase them and see if they are in fact the correct set of bolts and I'll let everyone know if this is the correct part number.

Guys If it helps the Timken Part Number is #513121 for the front and for the rear #512237 I have too do mine as well. Should I do the bad one or do both fronts at once??

He was asking for a part number of the bolts, not the hub :)

Hey guys, do you suggest replaceing both sides at the same time, or just the bad one ? Thanks a ton...

Some will claim you should do both because they wear pretty evenly. Me personally, I do the one that's bad. Sometimes I win and sometimes I loose (it's about 50/50). I've replaced one and had the opposite one last 50,000+ more miles and I've replaced one to find the other was making noise, but was over powered by the first (or it fails less then a couple months later).

Personally, I say inspect them as best you can and only replace what's bad.

I feel like if the left one is bad, replace both. if the right one is bad, replace the right one only.

Since the right wheel is the one that seems to take the most abuse (being the only drive wheel) I would rather see that one always have a new one when needed. But that might be a little over kill :)

I believe that bearings are NOT meant to last forever. How can they? They take a beating more than any other part on the car. Every bump, every chuckhole, everything you run over, the bearings take a beating. I think if you've got over 100,000 miles on your car and one goes bad, replace them both. To me, it's like replacing shocks or struts. You don't usually replace just one, you replace a pair. I've got over 167,000 on my Intimidator SS and I just replaced the front hubs. I still have a howl, so the rears are next. They FEEL good, but it's way past time to replace them. One of the fronts was loose. Easy to tell it's time for that one.

Do them as a pair. For the extra $100, it's worth the peace of mind to me.

So true... I guess I'll be doing both... Like you said, only $100 why not just do them both for the peace of mind.... Thanks again guys...mjclemm...

I just ordered the rears TIMKEN Part # 512237 from Rock Auto (2) for $170.14 delivered.
GREAT price!