This 5pc cross sill kit fits: 1999-2006 Chevrolet Silverado fleetside with 8' bed 1999-2006 GMC Sierra fleetside with 8' bed Measurement 64 1/4 x 8 1/2 x 6 Weight 43.2lb This is all of the cross sills, except the rear cross sill under the tailgate, for an 8' bed
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