Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Electronic throttle control, normal operation.
As the dealer has said.
They mean engines aren't meant to be revved up in neutral.
Can you hear this sound from the drivers seat?
Does it have the factory airbox and ducting?
Have you compared yours to another car at the dealer?
So you had your car and another car side by side at the dealer?
And they say it is normal?
Strange for the dealer to say it is normal, if a side by side hasn't been done yet.
Especially in your presence.
My bet is, there is something abnormal that the dealer won't admit to.
I doubt the throttle body is faulty.
I think the airbox could have a leak though.
You then may hear unfiltered airflow.
Let's see what happens when two cars are side by side for comparison.
Make sure you are present when they do this.
How did you go with your dealer?
I hope my advice has been of assistance to you.
Well that seems fair enough.
But many cars are programmed to not rev beyond 3000-4000 rpm in neutral.
Lets see what you think after the 1st service.
Hope they remember to do the set/reset programming.
Hope it all goes well for you now.