Join Date: Mar 2015
Location: Fort Walton Beach Florida
to all you guys that drove the 2017 model Colorado with the 3.6, I believe that the transmission is the 8 speed not the 6 speed. a total redesign. I fixed my trans problems by going the the service manager and telling him that I have a clunking sounds that come from the rearend on acceleration and braking, they tested the truck and it failed. they then replaced the springs and re torqued everything, now on my daily 35 mile round trips on hilly terrain, she shifts just like she is suppose to, most of the time, she will hold the gear at 70 to 75 mph.. now I am happy with her...
mine is a 2015 Colorado Z71 3.6 V6 21000+ miles
2015 Colorado Z71 Red Rock Met. 2WD V6 EC TTP Nav Bose