For 1975-1986 Chevrolet K20 Rocker Panel Backing Plate 88164ZC

For 1979-1986 GMC K3500 Rocker Panel Backing Plate 75185KB

For 1979-1986 GMC K3500 Rocker Panel Backing Plate 31814DNQZ

Left - Driver Side Rocker Panel Backing Plate fits GMC K3500 1979-1986 61VQKD

Right - Passenger Side Rocker Panel Backing Plate For GMC K3500 SJ375CT

Rocker Panel Backing Plate Passenger Side For 73-91 GMC Jimmy Chevrolet Blazer

Right - Passenger Side Rocker Panel Backing Plate fits C3500 1979-1986 11HCMD

Right - Passenger Side Rocker Panel Backing Plate fits K1500 1979-1986 74HGMS