MattPerryRacing

Trying to diagnose a sound related to my 2016 Chevy Silverado 2500HD 6.0 4x4.35mph low throttle (1200-1500rpm) input uphill occasionally get a grinding sound that resonates back into the gas pedal.Doesn't sound like a u-joint, rear diff spider gears, wheel hub, or cv axles. Sound come from below the drivers seat.
The grinding isnt a high pitch grinding sound or like gear slipping. It's metal on metal like the wear indicator on a brake pad.Finding somewhat similar issues online but the only ones that somewhat relate (but dont) point to the transfer case or torque converter.
Sound does not occur if I accelerate with some authority but if I baby it then it will grind as I give it more throttle to get up the hill.
I notice the Sound going downhill decelerating earlier but i havent been able to recreate that one. Just up hill.

Any thoughts on what it could be?

mountainmanjoe

Could be a lot of things.
You can gadgets online for around $70 that let you listen in to different parts of your vehicle, and help pinpoint it.

dsimps14

Ever figure anything out? I am having what I believe is the same problem with my 2014 1500 Silverado. It is a strange chatter noise that only happens at low rpms. Doesn’t necessarily affect anything that I know of. It just sounds terrible when pulling out of a parking lot or pulling away at a stoplight. Doesn’t happen all of the time but it does happen.