2020 equinox with the 1.5 4 cylinder.
It has a shutter or rumble that is very annoying.
exactly at 1200 rpm @ 35 mph.
It does not stick around but that is the speed that i cruise at. I think its driveline related but cant find anything obvious.
I did find a bulletin on the rear hatch, but this is not a wind noise.
Has anybody seen torque converter shutter on these things?

I'm not sure what gear it runs in at 1,200RPM and 35MPH, but this could be just the right combination of region, engine RPM, and required torque to create a harmonic that creates this.

To test this, manually kick it down a gear while maintaining the same speed.

I actually did do this and it goes away, But it goes away because the RPM changes ..The rumble is there at 1200 RPM

A good way to describe this would be it sounds / feels like you are going over rumble strips.

If you let off the gas completely at 1,200RPM/35MPH does it go away?

If you let off the gas slightly so that it works it'* way down to 34MPH, does it go away?

Is the check-engine light on?

How many miles on it?

How many miles have you owned it?