I have a 2007 Chevy Suburban LTZ 6.0 2WD with 83,000 miles. I am the original owner and up until this morning it's been running great. After about 15 minutes on the freeway, going about 45mph in morning traffic, the Stabilitrak/Traction Control warning lights start blinking on the dash followed by the check engine light. Everything feels fine and the lights stop blinking. That is followed by a rattling, ticking noise coming from the motor. Pull off the freeway, turn off the engine and wait a few minutes but as soon as I start it the rattling starts up again. Any ideas or suggestions on what is wrong? I don't have the money to take it to a mechanic, so if there is (hopefully) an easy and inexpensive fix, I would be most appreciative! Thank you...

 

A lot depends on where the noise is coming from... Check all of your fluids, oil, transmission and coolant ....
is the noise happening at idle or when the engine is rev'ed ?
post a video of the sound(s) and where they are coming from as this may help narrow it down...

 

I checked all the fluids and they're all good, not leaking or burning oil.. Motor rattles as soon as I start the engine, while driving and doesn't stop until I turn it off. After about 10-15 miles of driving it seems to be losing horsepower and then the warning lights will blink a few times and stop. I will upload an audio and hope that helps....thank you

 

possible misfire if you're losing power??? get the CE codes and post them

 

Did you find an answer to your problem? I am having the same issue.

 

Given this thread is 3yrs old, I am sure by now the OP knows what the problem was and has likely either resolved the issue or cut bait and gone fishing with his Burb, but has decided not to post a follow up. Good luck with your problem. Hope it is not serious.