Tony;
Welcome. Let me recommend that since you want to work on the car yourself, you go to <www.helminc.com> and order your year specific shop manual. Then you will have the real facts. Helm publishes them for most manufacturers. I have a shop manual for every Vette I've owned over the years. Good luck.
Haven't checked lately, but ~$135 give or take. It will be either 2 or 3 volumes--depending on year. 2003 is 3 volumes. Very well worth every penny--trust me.
Yeap, ebay. I got mine for my 96 for $65. I actually like having the haynes manual as well. Some things they just make a bit more simple to understand...and to find. The FSM is nearly priceless though.