I have a Thule car-top rack. I won't put my $4k bike on the back of the car where someone can rear-end me. My current setup for the Sierra is a 2x6 board with three fork mounts bolted onto it. Now my bike(s) fit right in the bed, under the cap. Out of sight and out of the weather.
https://www.amazon.com/Saris-Unique...hy=9051644&hvtargid=pla-493718985313
https://www.amazon.com/Saris-Unique...hy=9051644&hvtargid=pla-493718985313