cciyu 2x White 3157 Epistar 6000K 3020 85SMD LED Lights Bulbs Replacement fit for 2007-2013 Chevy Silverado DRL Light Back up/Reverse Brake Parking Light Turn Signal Light Type of Lights: 3157-Epistar LED chip build-in projector light with 85-3020-SMD Long-lasting Life - 50000+ working hours. Cross Reference: 3157 3156 3057 3047 3155 4114 4057 4157 3057A 3357NA Application: Tail Light, Brake Stop Light, BackupReverse Light, DRL, Day Time Running Lights, etc. IMPORTANT: Our bulbs come with Standard Base, NOT CK Type. Don't put standard bulbs into CK type sockets. It may pop the fuse or blow the bulb. Or the bulb will light up amber ONLY. Use a electroprobe to check where the two Positive Points locate in your stock socket.You can also buy a pair of standard sockets to modify the wiring.