Yes..it will fit..but some of the s10s the bed got narrower toward the tailgat..so its wider up by the cab..
I had an aluminum one for years...from the outside it looked fine..but on the inside u could see more of the bed rails up by the cab .....
But yea it will fit and work..
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Heres an old pic
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Just for fun..heres a more recent pic..taken in almost the same spot lol
Lol lets see if u can spot all the differences lol.