As the the title says, my truck has a vibration when hitting 40 threw 55mph, it’s like I’m driving on rumble strips, if I let off the gas it’ll stop but pick back up. It’s not a constant rumble but happens heavily at those speeds.
Edit/ 2020 Chevy Colorado Z71 V6, automatic trans, does have 4x4 capability, under 50,000 miles
Those have a really common issue with torque converter shutter, take it to a chevy dealer and they can do a “super flush” on the transmission and it should take care of that issue.