You might try getting the local football team to help you lift up each corner and place 2x4 s under each to support the weight and take it off the bar. Or, you could get some farm jacks and do it that way. Once the weight is off you might be able to work the bar loose. I've never done it, but that is how I might go at it. Can You lift the top a bit with the switch? If so, that will work also. Just get the 2x4s under the corners to support the top.
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2201 TL
2010 Nissan Titan king cab SE
4x4
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