2003 cavalier keyless entry

Tomj1404 its looks like your fairly new to the game and as long as your willing to learn you will be able to do a succesful keyless entry.  A word of advise:Learn how to test for wires as this is the same for all type of cars.  To test you will need a multimeter or voltmeter.  Look at this website and learn THE THEORY of how things function.  As long as you know the theory of testing for specific things using a multimeter you are LESS and I mean LESS likely to damage a vehicle.  It this case its yours, when you have the theory in your knowledge base you can basically tackle any vehicle and I do mean any regardless if you have never touched that vehicle before.  Good Luck and as always we are here to help.