By "side panel" I assume you're looking at the kick panel; the one under the dash ends, between the door and the firewall. I don't know the '97 model, but on the older trucks (through '94) you remove the step plate to free the bottom of the kick panel, pull/pry out the push-in retainer (the "button"), and then rotate the kick down and to the rear to free the skinny strip at the top. On mine, I can pull the carpet out from under the kick panels, and then tuck it back in behind them when reinstalling it.