I'm sure there are great Techs, but I think you got a NOT so great one.
Reminds me a bit of watching a Tech at a local Chevy dealer put a friends Gen 6 Camaro up on the hoist. ZERO attention to WHERE the pads were under the car.Tech did damage to the underside.As well as damned near slid it off the lift! There are SPECIFIC jacking points with that gen camaro. Guy didn't care.
I'm interested in a new Colorado. Have they gotten a fix for the shudder issue yet?
I had a 2017 Camaro SS with the A8 auto. Some owners of the Gen 6 Camaros were experiencing some sort of shudder. A trans flush and refill with a different AT fluid seemed to solve it.