99-06 SILV/SIERRA + 07 CLASSIC FLEETSIDE MOST FORWARD CROSS SILL 64 1/8 X 3 1/2 X 2 WITHOUT BED MOUNTING NUTS

This most forward cross sill fits:
1999-2006 Chevrolet Silverado fleetside 1999-2006 GMC Sierra fleetside
Measurement 63 3/4 x 3 3/4 x 2
Weight 8.8lb   This is the bed floor cross sill that is the closest to the front bed panel- it is the one in front of the sill used to secure the bed to the frame