Soooo...after further investigation....the sway bar mounts (1st 3 pictures) although rusted, theyre secure to the frame.

 

Everything that I did was under the dash and I didn't really think that a couple squirts of a lubricant would relieve a noise and vibration that made me think that my suspension was ready to fall apart underneath me, but it did. Yours is 4WD where mine is 2WD, but all the rust sure looks familiar, LOL. I just turned 241,000 miles, and although there's a lot more sources for clunks and vibrations in your situation the only thing that I ever had replaced was the hubs and just recently stabilizer links and inner and outer tie rods which I did myself (I'm like you, I do as much myself as I can). After four Suburbans you get pretty good at this stuff, and I've learned what to tackle myself and what to pass on, but none of that suspension work was related to the noise and vibrations. Your under dash pic shows the yoke I'm talking about but it looks spotless; wouldn't hurt to give it a blast of WD40 tho...you may be as surprised as I was. Damn rust...now you have me wondering about my brake lines.

 

Have you tried tie rod ends? I know you said you did the hubs and such with the control arms as well so there shouldnt be a wallowing out issue on new control arms but the tie rod ends may be worn or loose. Also check your caliper bolts. As you said seems to be less noticeable with brakes applied so the pressure may hold them more steady. Do you feel it in the wheel? Or just hear it? Does it seem to come from 1 side or the other?

 

[QUOTE=subfan597;431724]Subfan, I believe there was a TSB concerning the intermediate steering shaft on 07 and 08 burbs. This 1 is for 2011 but they had issues with other years as well so something to look in to

 

I just have the tie rod ends, i just wanted to wait on doing them because afterwards im most likely going to have to do an alignment and that requires me taking it somewhere haha. As far as feeling anything, I dont feel it in the wheel or anything. All I hear is a terrible noise when I'm driving at non-highway speeds. If i go on the highway and hit bumps, i dont hear it. I'm going to try and upload a video and try to post it so you all can hear it.


thanks for all the possible options!

 

Soooo thank you everyone who helped out, I found the noise!!! It was the calipers. The slides were frozen which I guess caused the calipers to rattle.

 

Thanks for posting back the solution to your problem as it may help others in the future.

 

Well that was the other suggestion in my post after the tie rod ends. I've learned fairly quickly with both my former 04 burb and my current 08, that the caliper pin guide bolts have to be replaced pretty much every time you do something with them. They are made of a softer steel, easy to round off, notorious for getting stuck and many folks easily miss the need to lube the new pins when putting them in. Others when replacing calipers reuse the pins but use new bolts but forget to add additional lube before putting them in. The heat and friction causes them to freeze up. Glad you fixed it but as an FYI for the future anytime you have to remove those bolts buy replacements and check the pins and re grease them each time. Just to be sure. They are responsible for dealing with a lot of heat, friction and weight. This way, while a bit tedious, ensures they wont be the problem again. New bolts usually come with new pins anyway and for a set for each wheel depending on where you buy they may come in at 15 per caliper or less. Ebay is fantastic for finding cheap parts that work fine. A for example would be...well 2 actually. My 08 burb has the old driver valve cover on it with the baffling flaw for the PCV valve and that's built into it. A new 1 at a store like autozone or oreillys set you back about 120. Got mine with the updated baffling and of course the new PCV built in for 67. For my parent's 14 Cruze, needed a timing belt. Best to get in a kit as you have to replace the water pump and the crank pulley bolt and the timing idler and tensioner but autozone and the like wanted 242 for the kit. Got it from EBay for 54 plus free shipping. I'm sure most folks on here do the same but for those that dont you still get quality stuff for a fraction of the cost.

 

Thanks for the insight! I made sure to grease them and will continue to grease and keep an eye on them every time I do the brakes.