If you are in search of an Authorized Heartland RV Dealer, GIANT RV - DOWNEY is here to serve you. GIANT RV - DOWNEY and Heartland RV are committed to helping with your Heartland RV Product needs for you and your family. GIANT RV - DOWNEY is your authorized RANCHO CUCAMONGA, CA Heartland RV Dealer for the following Heartland brands: Bighorn, Milestone, Prowler Fifth Wheel, Sundance S7, and Sundance S5. You can find this Heartland RV dealership, GIANT RV - DOWNEY, located at 10721 JERSEY BLVD or call them at 909-981-0444. With Heartland’s strong commitment to its customers and cutting-edge innovation of quality Heartland products, we are certain you will find the Toy Hauler, Travel Trailer or Fifth Wheel you are looking for today.