Archon , the TSB is quite a read amd I have to believe 4 out of 5 Gomer Goodwrenchs wouldnt get through it without shaking their head twice. I really havent had any problems with my RSA'* yet but they are low miles. If GM knows the tires are problematic, Why do they keep dipping in the well. I have to get the meat my new rims ask for soon and really confused as just what to get.

GXP Venom. I agree 100%. I'm not even sure how many dealers actually have the Hunter machine, and probably for good reason. Why GM sticks with the RSAs, I don't know. I know for a while, they had a tire replacement policy in place (only during warranty of course) away from the RSAs for those who had the problem. Some cars had the problem, others didn't. One reason given was the lower mass suspension, including the aluminum control arm providing less inertia making vibration more of a problem.

I'm not a tire guy, so I count entirely on the wholesaler where I buy my tires. They have yet to steer me wrong, nor several people that I have refered there. If interested, I can give you their 800 number...they ship them out, also.

I am getting the tires road force balanced Wednesday morning, will let you know the results.

Thanks auroralover. i look forward to seeing if this helps you any. the fact that there clearly isn't a straight-forward answer to this problem really blows. i guess having the rims checked first for dents might be the easiest and cheapest obvious check, so i'll probably start there.

The Service Bulletin for the bad intermediate steering shafts says "The clunk noise may be caused by a stick-slip condition in the intermediate shaft. An interaction with the steering system creates a vibration that travels up the steering column to the steering wheel." I haven't experienced this, but could that possibly be the source of the steering wheel shake?

Woody, that'* not a bad thought, but I'd guess probably not. Minor changes in the position of the steering wheel does not produce the clunk that is felt, and i'ts quite a differant feeling. I wasn't experiencing the shake or vibration at higher speeds when my steering shaft started having problems.

Had my Intermediate Steering Shaft replaced tow weeks ago and no change in the vibration....... :(

So after review by my local guy - he swears it'* the tires. He said there was "separation" and they are moving both side to side and up and down. 2 of the 4. called the dealer (sullivan tire) that i bought them from and it was 4-06 with my car'* miles at about 33K. so i'm over a year and 18K miles since purchase. i guess what it'* looking like (this is before sullivan has looked at them - appt on thurs) is 4 new tires for me after exactly 15 months and 18K miles. i don't trust getting just 2 RSAs to replace the bad ones since i think i'll be back at this again in another year. thanks again goodyear. my mechanic suggested michelin to replace the goodyears. anyone else have a particular tire they've had success with? I'll post back after my appt with sullivan to close the loop, but this is at least the way it looks like it'* going to play out for me.

Took the car in for a road force balance and 2 of the 4 tires are out of round. Thanks Goodyear
But they are too new to throw away, so I will put up with it for a while, or until it just drives me completely insane

have you tried to get the car aligned that could be the problem also