If you are talking about the Ford slide,Will the slide out hold 125lbs extended?
Yes, I sit on mine with no issues. Its rated for 600lbs.
I used my Fordpass points to buy mine, its great. Kids love to sit on it. It allows me to stuff the back of the Bronco (coolers, gear) and be able to pull out the tailgate to sit or work on.
I have no regrets installing mine.
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