No matter the condition of your 2003 Monte Carlo, OPGI has the Water Pumps products you need to boost performance and get you back on the road. We currently carry seven Water Pumps items to choose from for your 2003 Monte Carlo, and our Price Match Guaranteed prices range from as little as $34.99 up to $594.99. OPGI offers Aeromotive plus zero other trusted brands of Water Pumps products for your 2003 Monte Carlo, to help you find quality parts you can rely on. With OPGI's 45-day return policy, 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 Water Pumps items in person.