Description
Bed Cross Sill – Rear – 1947–Early 1951 Chevy GMC 3100 1/2-Ton Stepside Pickup | 9-Board Bed | OE-Style Replacement | AMD
Restore the structural integrity of your Advance Design pickup bed with this OE-style Rear Bed Cross Sill for 1947–Early 1951 Chevrolet and GMC 3100 1/2-ton Stepside pickups equipped with the original 9-board bed floor (8 bed strips). Manufactured to original factory specifications, this heavy-duty rear cross sill provides the support necessary to reinforce the rear of the bed while maintaining the correct factory fit and appearance.
Positioned directly in front of the tailgate, this is the last (rear-most) bed cross sill in the bed assembly. Precision stamped from heavy-gauge steel with the correct contours and mounting locations, it serves as a direct replacement for rusted, bent, or damaged originals and is ideal for complete bed restorations or repairs.
Whether you're restoring a workhorse or a show-quality Advance Design pickup, this AMD reproduction delivers the OE-style fit, strength, and quality your truck deserves.
Key Features
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OE-style rear bed cross sill
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Fits 1947–Early 1951 Chevrolet and GMC 3100 1/2-ton Stepside pickups
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Correct for 9-board bed floors with 8 bed strips
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Rear-most bed cross sill located directly in front of the tailgate
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Heavy-gauge stamped steel construction
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Correct factory contours and mounting locations
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Restores bed floor strength and structural support
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Direct replacement for rusted or damaged originals
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Premium AMD restoration component
Vehicle Compatibility
Chevrolet
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1947–Early 1951 3100 1/2-Ton Stepside Pickup
GMC
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1947–Early 1951 100 1/2-Ton Stepside Pickup
Technical Information
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Product Type: Rear Bed Cross Sill
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Position: Rear-Most Bed Cross Sill (Adjacent to Tailgate)
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Bed Floor Configuration: 9-Board Bed / 8 Bed Strips
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Material: Heavy-Gauge Stamped Steel
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Installation: Direct Replacement
Notes or Fitment Clarifications
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Fits 9-board bed floor applications only
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Correct for trucks equipped with 8 bed strips
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One rear cross sill required per vehicle
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Installs as the last cross sill directly in front of the tailgate
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Manufactured to OE specifications for factory fit and appearance
1951 Model Year Transition:
The 1951 Chevrolet and GMC 3100 pickup model year was a transition period for Advance Design truck beds. Early-production 1951 trucks were equipped with the original 9-board bed floor (8 bed strips), while later-production 1951 trucks received the revised 8-board bed floor (7 bed strips). Because Chevrolet and GMC did not publish a clearly documented production break—and many trucks have had bed components replaced over the years—model year alone should not be used to determine the correct replacement parts.
How to Identify Your Bed:
A 9-board bed uses nine wooden bed planks and eight metal bed strips, while an 8-board bed uses eight wooden bed planks and seven metal bed strips. Count your bed boards or bed strips before ordering to ensure you select the correct replacement components.
This fits:
Vehicle Application(s)
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