Upgrade the rear lighting of your 1989-1991 Oldsmobile Calais with this genuine GM 16509919 LH Rear Red Side Marker Lamp. This combination light assembly features a DOT-certified reflector housing and an incandescent lighting technology, which produces a red light that is perfect for safe driving at night. The polished finish of the housing and the black housing color give the lamp a sleek and timeless look that complements the overall design of your vehicle. The lamp is designed for easy mounting with screws and operates on a 12 V voltage. With its vintage part and OE/OEM part number of 16509919, this marker lamp is a perfect fit for your Calais. Its universal fitment is a no, but its placement on the rear right of the vehicle is suitable.