4-Piece Set of Upper & Lower Signal Side Marker Lamp UnitsReference NumbersDorman Number: 1650136, 1650137, 1650140, 1650141 OEM Number: 5977463, 5977464, 5977739, 5977740 Partslink Number: GM2550148, GM2551148, GM2550145, GM2551145 Following VehiclesNOTE: Models with Composite Headlamps ONLYGMC Pickup 1994 1995 1996 1997 1998GMC Pickup Truck Old Body Style w/ 5.7L engines ONLY 1999 2000GMC Pickup Truck 2001 2002GMC Suburban 1994 1995 1996 1997 1998 1999GMC Yukon 1995 1996 1997 1998 1999;Is This the Correct Part?LOOK at the part you have to replace and compare to the picture above.CHECK the part numbers of what you need to the reference numbers listed above.FIND the make, model, year and trim (if applicable) of your vehicle above to ensure a match.