I believe that piece of wood goes the full width of the slide out and it serves as a lift to raise the slide out floor so it doesn't drag on the carpet The 'extension' on each side is excess tolerance for slide out misalignment. They can probably be cut off, but all this is just my best guess.
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Larry Day, Texas Baptist Men volunteer
'13 Silverado LT 3500HD D/A CCSB 2wd, custom RKI bed
'19 Starcraft Telluride 292RLS
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