I bought a used 2016 Diesel Colorado Z71 and immediately began having issues. They replaced the EGR and temperature sensors 6 times, replaced the exhaust manifold, replaced the turbo exhaust hose and could never find the root of the problem. I had it for about 8 months and after fighting with the dealership and GM they agreed to let me trade it back in if I bought a new one. In October 2020 I bought a 2019 Diesel Colorado Z71 and so far the EGR sensor has been replaced 4 times, the replaced the exhaust manifold and just had to replace the turbo exhaust coolant hose. I have an open claim with GM to buy the truck back since this is the second truck with the same issues with no answer for what is causing the problem. Curious if others are experiencing similar problems.