No matter the condition of your 1977 Cutlass, OPGI has the Sending Units you need to boost performance and get you back on the road. We currently carry sixteen Sending Units to choose from for your 1977 Cutlass, and our Price Match Guaranteed prices range from as little as $15.99 up to $409.99. OPGI offers Marshall Instruments plus two other trusted brands of Sending Units for your 1977 Cutlass, 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 Sending Units in person.