15858151 // Genuine GM DRIVER Left side Tail Light assembly removed from a salvaged 2009 Cadillac DTS. TESTED. ALL LED lamps are functioning. You might see the aftermarket selling these units in pairs do to the difference in the LED's they use..... usually if you only buy one you'll notice a difference in brightness between the replacement and your original. This is for those who have an original on the other side and only wish to buy one and have a match !! Additional Details ------------------------------ Package quantity: 1