No matter the condition of your 1979 DeVille, OPGI has the Electrical & Electrical Testing Tools you need to boost performance and get you back on the road. We currently carry eleven Electrical & Electrical Testing Tools to choose from for your 1979 DeVille, and our Price Match Guaranteed prices range from as little as $13.99 up to $299.99. OPGI offers American Autowire plus six other trusted brands of Electrical & Electrical Testing Tools for your 1979 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 Electrical & Electrical Testing Tools in person.