heavymetal200p

Heh, yeh that's a little far for me. I'm on shift work and I have my 3 kids at home with me on my non work days so long trips won't happen. I'll try doing both suggestions tmrw evening and report any findings. I can see if I can get a recording of the noise and upload it somewhere for you to hear it.

I'll try making sure the AC is off and see if it makes the noise still. AC controls are a bit different in this SUV then your truck but it can be toggled. I haven't attempted to recreate it via brake stand but I can definitely try that too and see if it does. The noise seems to be RPM based from what i recall atm. When the truck kicks down a gear to pass and the RPMs go up so does the noise in volume and speed. I'm in northern Ontario, around the Timmins area.

At a stand still the truck won't produce the noise oddly enough, or at least not audibly but like you mentioned, if I listen for it from under the vehicle it may be there just not as loud. At the moment, if i were say in drive, moving at say 40kmh and get on the pedal even moderately to speed up on the highway the noise becomes extremely noticeable. Even a semi hard pull from a stop sign or light in town produces it very noticeably. I had an idler pulley on my older f150 produce a similar noise when it was on it's way out. Not as loud but the same sound like a s ratchy rattling noise. I know jsdirt mentioned that these engines are finicky and that repairing it may be futile, but If it is an internal engine bearing what are my options? Am I still better off looking for a doner motor? I've been toying with the idea of trading my Escalade for an older 3/4 ton truck as i need a truck now more then the SUV, but i refuse to make a trade until i can track down and fix the noise for the possible new owner.

I think I'm gonna do the oil change early and remove the pan this time and have a look. I'll look for that o ring you mentioned and see if theres any noticeable wear or damage. Once I button it back up I'll fill it with something thicker and see what happens. It's worth mentioning also, the noise I'm hearing only starts happening under the previously mentioned circumstances when the engine is warmed up. If I start it up and drive it within a couple minutes it won't be there, but once she's warm it will.. no high temps, no engine codes atm either. Describing the noise the best I can... It sounds like the ball in a paint can being shook at a ridiculously high speed. Picture that sound but continuously with a sorta screech in there too. Haha anyways. I'm not a GM guy really, and I don't know much about there engines, but I got this from a family friend for next to nothing 3 years ago or so. It has 185,000km on it atm and it was dealer maintained until the day I bought it, after which it was maintained by me. Thank you for the suggestions and I formation. Starting to sound like I have a ticking bomb on my hands.

I have a 2002 Escalade 6.0L AWD and recently it's been producing what sound like a spun bearing sort of noise. It only happens when the drivetrain is in a gear and under acceleration load. The harder I accelerate the louder and prevalent the noise becomes. I can subdue the noise by accelerating very slowly while keeping the RPMs low. In neutral, bringing the rpms up I have no noise whatsoever. Any ideas? I change oil regularly and check it, truck isn't burning any oil between changes. I put 4 brand new U joints 20k ago as the old ones were damn near ready to fall off. Other then that I haven't touched anything engine or drive train related on it.