Go online to Google and search for 2004 Chevrolet Aveo manual, and you will be able to download one onto Adobe Acrobat for free. Also keep it on your computer desktop. If you want to print it out, it will be close to 100 pages. Also check to see if you still have the original manual in your car's glove compartment. It should be there. If not, download it for free online once you Google it, and you will be OK.