On a rare occasion, the owner of a 2015-2021 Chevy Colorado truck may have a concern of a vibration at idle in gear or at a very low speed.
The technician should inspect for a stray nut or debris (rock, etc.) wedged between the rubber and metal portions of the transmission mount.
Loosen the mount fasteners and manipulate the mount to allow removal of any foreign object. Torque all fasteners to specification.