carloliveira

Sounds like the tranny shudder, did your repair invoices say they did a flush and fill or replace the torque converter at any time? After 3 repair attempts you may qualify for lemon law. Or try a different service department, not all are created equal.

I have a 2018 Crew Cab LT V6 long bed, the cold start rattle is as mentioned before, the cam phaser rattle due to oil drain back after sitting for a period of time.....the dealer isnt going to repair anything and is going to tell you there is no problem, most people wont hear it because if your sitting in the vehicle and turn the ignition at cold start you cant hear it from inside, I remote start all the time and hear at it almost every cold start.....best described as a rattle for less than a second only when cold start or first start of day.....visit my YouTube channel to see a video to confirm ....there is a TSB for the rattle in other models but it doesnt cover the 2018 Colorado I believe....