[Ski-me]

I don't think it was different but a valid question with the seatbelts changed in rear for 90 and 91. If it's not been off, I think it's going to be a little tough to get it off. Might take a bit of work. But I do see a 91' topper for sale locally, so I do know they come off.

When you take it off, there are some alignment pins in the back. So you will need to lift the back up first to clear those pins, then it will pull away from the cab, secondly.