2021 Crossbar positioning

[Philpug]

Our 18 is in the shop and will be renting a 2021 and we need to put our box on the top. the rental Suburbans do not have cross bars. It looks like we can use our 2018 cross bars, they are the same part number. Can someone post the distances between the points on the 21, from #2 to #3 and #3 to the tailgate. TIA.

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https://ecom-dam.ext.gm.com/products/documents/ISheets_22981739.pdf

 

[the understudy]

Our 18 is in the shop and will be renting a 2021 and we need to put our box on the top. the rental Suburbans do not have cross bars. It looks like we can use our 2018 cross bars, they are the same part number. Can someone post the distances between the points on the 21, from #2 to #3 and #3 to the tailgate. TIA.

View attachment 363069

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https://ecom-dam.ext.gm.com/products/documents/ISheets_22981739.pdf

Unfortunately, I don't think your 18' bars will work. My 21' Suburban doesn't have any bolt holes on the inside roof rails. I have 21' OEM crossbars that clamp, no screws at all.