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Re: Where are the usual rust spots 4 suburbans?
Rust through in the vertical floor portion under the rear seat was the bigest issue for me (as shown It was an indicator of issues with the large crossmember and crossmember to inner sill fastening points. I think many suburbans suffer from this since moisture gets trapped between crossmember and the spot welded floor vertical piece . I fixed mine but it was a huge job. Check the condition of body at ends of crossmember.
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