Im new to the site but ive had my cavalier for about a year. I have an 03 cavalier ls sport coupe, automatic with 156,xxx miles, got it from original owner and still have window sticker and books. This little car is amazing but im having a couple issues. My check engine, abs light, and another light is on but when i plug a code reader into it no codes show up and it wont let me clear them. Any thought on what it might be would be helpful.

should be able to read the check engine codes, good enough scanner you will be able to scan abs etc.....