Left - Driver Side Rocker Panel Backing Plate fits GMC K2500 1979-1986 71KGWT

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

For 1979-1986 GMC K2500 Rocker Panel Backing Plate 97785PV

For 1979-1986 GMC K2500 Suburban Rocker Panel Backing Plate 55727MJ

For 1979-1986 GMC K2500 Rocker Panel Backing Plate 82286CNMX

For 1979-1986 GMC K2500 Suburban Rocker Panel Backing Plate 52469ZGWD

Right - Passenger Side Rocker Panel Backing Plate fits K3500 1979-1986 26ZRZM

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