To ensure reliability, purchase GM part # 1999437 High Beam Bulb. It is sometimes referred to as Cadillac Headlight Bulb. 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, Escalade, Fleetwood models.
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