99-06 SILV/SIERRA +07 CLASSIC FLEETSIDE CROSS SILL BETWEEN WHEEL TUBS 47 3/4 X 3 1/2 X 2

This mid cross sill fits:
1999-2006 Chevrolet Silverado fleetside 1999-2006 GMC Sierra fleetside
Measurement 49 x 2 3/4 x 3 3/4
Weight 6.4lb   This is the bed floor cross sill that is between the wheel tubs- a 5.5' bed and 6' bed use one of these and the longbed uses two