I have a 2017 Colorado WT…
I have a 2017 Colorado WT. Bought it used with 45 K. Driving it home from dealer had shuttering at 55 mph. Called dealer ( not a Chevy dealer) and he said it might be tires which I needed new so replaced them same problem. Returned truck and they took it to Chevy dealer there was a recall for it and they did a trans flush with Mobil 1 blue which fixed the problem. Currently have 130k on the truck and have flushed it twice once because the trans temp sensor went bad and they had to remove the trans cover to replace harness and another time because I insisted on it plus a filter replacement. Dealer costs are outrageous and I was stuck with them now I have a local mechanic and hope the price will be better.