One problem related to differential unit has been reported for the 2015 Chevrolet Colorado. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2015 Chevrolet Colorado based on all problems reported for the 2015 Colorado.
My 2015 Chevrolet Colorado z71 4x4 has a serious, violent vibration at highway speed. The dealership has had the vehicle for going on 40 days. The truck had approximately 24-25000 miles on it and while on vacation in texas while driving the truck on interstate 10 where the speed limit is 80 mph the truck began shaking and vibrating violently. The truck has been at the dealership since September 08, they have replaced the upper right control arm, road force balanced the tires twp times, alignment two times, replaced the tires, replaced the tires and wheels with some from a 2017 Colorado, rebuilt the rear differential, now the rear differential has been replaced with a new factory differential, and the truck still has a serious, violent vibration that makes the entire truck shake. It feels like the truck is going to come apart. Upon speaking with gm in detroit, they tell me they have elevated my concern to their engineering department, whereas the dealership has told me they have been working with gm engineers to fix the truck. The mechanics who have been working on it are concerned with the vibration as well. Gm cannot tell me when or if they can fix this truck or, what is truly wrong with it. I truly believe it is a serious safety issue that the builders of the truck cannot fix it. Maybe a recall is necessary to figure out why this gm truck shakes and vibrates so badly.