Carquest and Advance Auto Parts may have similar names, but they are two different companies. Carquest is a parts supplier that is owned by General Motors. Advance Auto Parts is an aftermarket parts supplier.
Carquest supplies OEM parts to GM dealerships and other automotive repair shops. Advance Auto Parts supplies aftermarket parts to retail customers and professional installers.
While Carquest and Advance Auto Parts both sell automotive parts, they serve different markets and have different ownership. Carquest is owned by General Motors and supplies OEM parts to GM dealerships and other automotive repair shops. Advance Auto Parts is an aftermarket parts supplier that supplies aftermarket parts to retail customers and professional installers.