I slip a neon yellow zip tie under the protective cover on top edge of tailgate. Just stick it straight in (without any loop) so the "head" is visible in my rear view driver's side mirror. If I can't see the yellow zip tie, then I stop to make sure the tailgate is up.
Sometimes it needs adjusting to keep it visable, but it's a cheap, easy solution.
Sometimes it needs adjusting to keep it visable, but it's a cheap, easy solution.
Sponsored