No matter the condition of your 1984 DeVille, OPGI has the Keys & Locks you need to boost performance and get you back on the road. We currently carry three Keys & Locks to choose from for your 1984 DeVille, and our Price Match Guaranteed prices range from as little as $25.99 up to $35.99. OPGI offers RESTOPARTS plus minus one other trusted brands of Keys & Locks for your 1984 DeVille, to help you find quality parts you can rely on. With OPGI's 45-day return policy and thousands of customer reviews, you can shop with the utmost confidence. Enjoy parts delivered directly to your home, or visit our sunny Southern California Showroom & Warehouse to check out our Keys & Locks in person.