Mitchell 1 provides TSB information to Auto Service Professional, an online edition of Auto Service Professional magazine, which fulfills a critical role in the automotive aftermarket by providing technical information to independent auto repair facilities and new car dealer service departments. We’re sharing this content in our blog, with a link to the Auto Service Professional website where you can read the article in full. Enjoy!
It might be rare, but a vibration at idle may be caused by debris in the transmission mount (nut, rock, etc.). When inspecting, a borescope may prove handy.
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.
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