You need to find out of the noise is being made by the suspension flexing or the driveline turning. It's probably just a bad bushing.

Come on Ironman ! jack it up put it on jack stands on the FRAME and move things around, shake the wheels and LISTEN you can find it Im sure !! good Luck Capt Bob

I've been trying to get it up on jack stands, but I need a little help to. Thats one heavy truck to pick up by myself. I try and get it up, but I get stopped at the beginning because whoever tightened my lug nuts last time, went a little overboard with the torque poundage. And I dont have a cheater bar, or really the time to try and find the problem, I'm probably gonna have it put in the shop and get a total look over and fixation while I'm in boot and MCT.

some more bump

does it make the noise sitting at idle or just when the truck is rolling, plus don't go to mtc and tell them that you 'couldn't' undo the lugs on your truck by your self

Turn the radio up and you won't hear the noise :-)

You get a free truck and gonna complain that the person who paid for it ain't gonna help locate noises you apparently don't care much about finding yourself ? ? LOL! Funny.

Quote from your other truck post ---'yeah, all the things that need fixing will have to wait until they actually fall off the truck.'

Well, if it's still squeeking,, it's ain't fallen off yet.

RB

Everything is about to fall off. It makes noises idling, vibrations starting at 55mph.

Mandy , Pandy Land , Need a tissue ? --------- did you every see that commercial -- makes me think of you sometimes -------- not sure what force you are going into , the Marines have my favorite motto , the difficult takes a while , the impossible just a little longer -- from reading some of your post I see you use the words 'can't' and 'don't' alot , I believe that is something that needs to be lost if you are going to make it thru ------------- I am a mechanic on heavy equipment and have had quite a few 4 wheel and 2 wheel drive trucks , tell me more about the noises that are plaguing you , what kind of truck , 2 or 4 wheel , standard or automatic , maybe I can give you some insight

its a 99 GMC automatic Sierra Z71 1500. I'm hearing like rapid metal clanging, and slower metal clanging which the slower clanging sound sounds like its coming from the 4wd (front diff, t-case, cv joints that area). and the rapid clanging sounds like its actually coming from the engine. it sounds like the heat shield on the header might be loose and vibrating.

The engine sound you discribe sounds like lifters tapping , an exhaust leak will also make a kinda tapping sound but I think you would know if exhaust is leaking , have you changed the oil yet , lifter tapping can be a bad thing which could require disassembling the motor to fix , it is usually brought on by not changing the oil enough or a lacck of oil pressure , but there could be hope for it , try doing a oil change and add a bottle of Lucus Oil Stabilizer ( which isn't cheap , about $11 a quart ) , Rislone is another good brand but Lucus is the best , put the Lucus in place of one of the quarts of oil when you change it , after a day or so it should quiet down ---------------on your 4x4 noise , it could be a ujoint , some have grease fittings on them that cn be greased , could be to late for grease , ring and pinion bearings check the oil in the axle , front hub bearings could also be your noise , they run on grease and disassembling it is the way to regrease them or maybe the chain in the transfer case is loose and banging inside the case , check transfer case oil and look for metal particles in the oil ------- does that noise happen all the time or just when it is in 4x4 ----------there are a few pointers , hope it helps , I would suggest getting a Chilton manuel for the truck and you will learn alot about the mechanics of what makes it tick , e bay could be a good source , you could also find it at stores like Auto Zone , Napa or Brookes and Noble book store ---- Semper Fi

they have all given some good advice. put all 4 wheels in the air on jack stands and run it slowly in gear and listen- do not get under it on jack stands !!!!-or maybe get it to someone to put it on a rack for you which is safer and u can then get under it when its running in gear--then use a yard stick or a huge screw driver like a stethoscope--or use a cheap stethoscope and listen to all drive train components--shake each wheel and turn each wheel by hand and feel and listen

Maybe someone can swing by if they're close and have a look at the thing with you....

Trucks are like anything else in a man's life,,, women,boats, toys, etc...., they require a lot of attention and tending to.

Phantom noises are hard to describe and even harder to pinpoint over the internet. A bone dry wore out U-joint can sound like the friggin thing is gonna grenade at any minute, but yet a cheap and easy thing to replace.A bad front brake rotor or brake pad, bad bushings, exhaust leaks, AC compressor, etc, can all make terrible nosies when going south on ya.

It's the trial and error thing that can cost you an arm and a leg while replacing one suspect thing after another, trying to locate the source of the noise.

more experienced mechanics may be able to know exactly what the issue is when they hear the truck, and save you money and frustration down the road.

Good Luck !

RB

this guy is selling parts right here on LA Sportsman,,,,,,,,may be of some help.

RB

5 speed standard w/tranfercase $200.00, 6 lug rear end w/true trac locker w/373 gears $100.00 ,front end w/front diff. breaks, roters,axles.$200.00 KEITH (337)280-5799

turns out, it was a broken, shattered, well shattered best describes it, u joint on the 4wd driveshaft on the yoke. now all I have to do is fix all the squeaks and change mufflers and call it good. now for new tires, ball joints, bushings, and newer rims and 3 inches of lift and im done.

Come on now Ironman!!! Someone buys you a truck and your mad cuz they wont help you fix it?? Are they supposed to maintain it for life? All these other guys gave you some good advice already,you really need to drop 'cant' out of your vocabulary....especially goin into the Marines,but then again thats what boot camps for! they will either make or break you

oh yeah, I'm about to get out of the Marines DEP for a while and make some money and grow up before I leave.

Those particular years and engine are known for the knock. You may want to do some research and see if thats your problem. some do it when its cold, some do it at low rpms, some do it at high rpms.

could also be your knock sensors.