Giant RV Montclair The hub of the Giant RV Southern California Dealer locations is the “Corporate Headquarters” located in Montclair, California. This 10 acre-multi million dollar dealership has full RV service and RV parts center as well as a luxurious showroom and inventory selection that would impress anyone wanting a comfortable and satisfying shopping experience. Serving rv sales Los Angeles county, South Bay Los Angeles, Riverside and the Inland Empire. Conveniently located 45 minutes East of Los Angeles and only one hour and forty-five minutes from Ventura . You’ll find our 15-bay RV service department for RV service , serving the communities of Los Angeles, Orange County, Riverside and San Bernardino area.