[jcor3]

Anyone else have a rattle in the rear end? Sounds like suspension. I don't think it is the NPP, as it doesn't change with exhaust mode changes. I hear it at low to moderate speed. Not noticeable at highway speed.

Thanks in advance

[oOKhanhOo]

I hear it on my driver side rear. It’s a rattling sound, I don’t believe it’s the npp valve neither. Going over uneven, usually a drop, surface I hear it. I haven’t able to get under the car to check it out. I brought the vehicle in late 2018, tech wasn’t able to reproduce the sound, as expected.

[70chevelleSS]

Originally Posted by oOKhanhOo

I hear it on my driver side rear. It’s a rattling sound, I don’t believe it’s the npp valve neither. Going over uneven, usually a drop, surface I hear it. I haven’t able to get under the car to check it out. I brought the vehicle in late 2018, tech wasn’t able to reproduce the sound, as expected.

I had this exact problem. Take your wheels off and clean the S*** out of the hub mating surface (where the wheel and hub touch). Then torque the wheels to spec (cant remember the exact ft/lbs off the top of my head) I did this per advice here, solved my problem.

Does it sound like this?