Partsam 5xSmoke Cab Roof Running Marker 1313S Round lights+5050-SMD 168 T10 Ice blue LED Bulbs+Wire Harness for 1969 - 1987 GMC/Chevrolet C/K Series For 1973 - 1987 Chevrolet C/K series Full Size PICKUP Trucks For 1973 to 1987 GMC C/K series Full Size PICKUP Trucks For Full Size 73-91 Chevrolet and GMC Dually,Suburban and Blazer LED Type:5-5050-SMD LED; If the LED won't light up, simply flip it 180 degrees (reverse the polarity) Come with T10 plug socket, convenient for modifying & rewiring Cover Color:Smoke Direct replacement for OEM factory stock cab marker covers