As you are looking at the trim panel, hold at the top edge, and pull toward the shifter. It will pop loose with some force.
Then to reinstall, please install the lower edge at the upper instrument panel to windshield gap, with the top edge in toward the shifter, and pivot into position.
Let us know how you make out, c4c5
Thanks guys I did the job today . The trim came off just as you said . I didn't break any clips either but the bottom one would be easy to crack off . Mighty nice of Chevy to provide accessory wires down by the fusebox . Overall a clean installation !