Replacement cross sill for the 47-50 Chevrolet / GMC 3100 Stepside Truck's. Short bed models require (2) and long bed models require (3) of this cross sill. Starting at the front bed panel and moving towards the tailgate, This is the second and third cross sill on short bed models and it's the second, third and fourth on long bed trucks.
Please note: This cross sill does not fit 47-48 models with original under bed mounted fuel tank.
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