To ensure reliability, purchase GM part # 3540164 Switch Assembly, Headlamp Auto Control. It is sometimes referred to as Cadillac Headlight Switch. Directly from GM, genuine parts are superb with regards to quality, longevity, and fit. Every single part passed stringent quality testing, so you can be sure that it's safe, durable, and built to perform like your original parts. This part fits specific Cadillac Deville, Seville models.
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