Availability of car parts varies with make and model, but as of 2015, Parts Geek and Auto Parts Warehouse sell heater cores for a variety of Chevrolet automobiles. Eckler's Chevy Truck sells heater cores for some older models of Chevrolet trucks.
Auto Parts Warehouse website customers may search for Chevy heater cores by using the search function, calling customer service or using the live chat function located on the upper-right corner of each page. Auto Parts Warehouse offers free shipping on orders over $50. Eckler's Chevy Truck also offers live chat help as well as next-day and two-day express shipping options.