No it's not! I got lucky and found an empty grommet in the firewall of my GMC above the gas pedal. Granted not the same make but there might be spare pass through in there somewhere.
Also there's a set of factory pass-through wires, as part of the "upfitter" connectors. Underhood end is above the brake booster, attached to the windshield cowling. Cab end is at the steering column.
I finally got my wire through the boot that is pictured, the one where all the factory wiring is run through. I used a metal coat hangar and stabbed through the boot. Once through you have to angle it up down or around because there are stuff and things directly behind the boot. Taped my wire to my hanger and I was off to the races.