Strange noise when accelerating

[moloko]

Hello! I'm hearing an annoying noise when accelerating my 2011 Camaro RS in the climbs, it usually does exactly between 1200 to 1400 RPM, if you accelerate a little more, stop making the noise.

It doesn't that sound when it's in neutral shift, it only does it on slopes and in that RPM range.

The noise is something like this video Please Look!


Second 9 and second 19

My vehicle has 75,000 miles.
I always comply with the oil change on time, I changed it recently, always with Castrol Edge Synthetic but I still hear the noise.

I don't know if it has anything to do with it, but my starter was faulty, the car had trouble starting sometimes. Yesterday I just changed the starter for a new one and now it starts well. It is also common on the "Service Stabilitrack" dashboard and several lights are on the dashboard, such as the traction control disabled.

The car is working well, I don't feel a drop in power or anything.

If somebody knows that sound, please Help Me! Thanks!