Rear suspension noise 2006 Montana SV6

Everytime I hit a bump inthe raod the passenger rear sounds like I have no suspension. I have had it into a shop and they were not sure what it is. It acts like the shock is bad but I only have 36000 miles on the rig

For my part I have a 2002 with 68,000 kms and my chocks are to be change I guess.

I think to buy thoses with spring around to help for more confort in the back and change the front too.

Is your suspension on your van is an air suspension ? :wink:

Did u find out what the problem was? I have changed the air shocks but i still have the noise

Check the upper bushing on the rear knuckle.......should be no movement....will cause a clunk.....

On my sv6 I don't have the independent suspension on the rear end i have the single bar going across with the air shocks. I changed those out for new ones. Would you have anymore solutions?

Exactly what kind of noise? Does it happen over large or small bumps? Parking lot maneuvers?

Noise is hard to describe. Like a clanging sound drivers rear. I just looked under the car spare tire was tight and I tugged and pulled on everything while I had it jacked up. Nothing was loose.

Have had problems with the bushings where the mount bolts go through the axle and mount to frame. You probably will not see anything wrong with them, but that is likley the problem. The bushings are servicable.

Could you please help me on this link this is what i have under the van where would the bushing be? Thanks again for your help.

http://www.newgmparts.com/partlocator/index.cfm?action=getJointLocator&siteid=213815&chapter=&Sectionids=24,2788&groupid=20115&subgroupid=60085&componentid=0&make=28&model=Montana SV6&year=2006&graphicID=Z2P090&callout=7&catalogid=1&displayCatalogid=0

Couldn't find it on that link, but I was using my phone so that may have been why. I did find it on rockauto.com, Moog part #k200343. They did not have a picture, but the description is correct. 10.00 for the part. Noises are very difficult to diag without hearing it myself, but I have run into several of these when I couldn't find anything else wrong. Hope this helps!

Ok, got on my laptop, that illustration does not show the bushing. They are located at the piviot points of the axle assy. GM does service them, you may need to look at a dealer parts catalog.

so do u think I should order 2 of those?

If you're gonna do one, do them both.

gmtech1,
I'm having the same problem did you ever hear if he got the clunking noise fixed i checked everything on my 05 Montana sv6 and i can't find anything wrong visually just a crack in the road is noisy could you please post a picture with what you are describing what you think it might be thanks Bruce

Can you recreate the noise by bouncing the rear end?

If no, apply ebrake, jack up one rear wheel at a time.....now grab wheel and try to rotate forward and backward quickly.....if you hear a clunk, it's the upper bushing in the knuckle assembly....

Could you please show me the part your talking about thanks

Could you please show me the part you are talking about Thanks 51011

#2, the axle support bushing.

I have a '98 Montana that clunks all the time. I've replaced the obvious things but now I can take a look at this. Thanks.

Thanks gmtech1,
I have an appointment tomorrow morning to get the bushings done they said that's their is very little play but rusty so changing both bushings i have already changed the shocks that wasn't the problem will let you know the outcome....

Thanks gmtech1,
I have an appointment tomorrow morning to get the bushings done they said that's their is very little play but rusty so changing both bushings i have already changed the shocks that wasn't the problem will let you know the outcome....
So Bruicer, when you changed the shocks, what bolts did you use to mount the new ones. I changed shocks on my Montana ('98 with air compressor and level adjust in back) and I had to cut the old bolts out. I put in some new bolts and got constant clunking because the bolts were not tight in their holes. I had to find the correct size bolts and that fixed it.

Thanks Guys for all the replies,
I would like commend gmtech1 he was right it was in fact my axle support bushings i went to about 5 Garages and none of them could tell me what was going on so because 4 out of 5 shops said shocks went ahead and changed them which turned out not the problem the 5th shop i ordered him to drop the axle for inspection as he did as per my request we found out that it had lots of play that couldn't be seen when left in so today i went back and changed both sides to save money down the road at a cost of $460 Canadian... 2 bushings Gm most of the money was labor of course..lol..
part# 15829134 x2 and Monroe shock# 37156 x2 hope this can help out other Montana SV6/Uplander owner Thanks again...

Mine was the emergency brake cable laying on reaxle. Rubber stopper wears through. Just need to re-wrap it. Noise gone!