can someone please help. I have a 1993 camaro V6 3.4L, automatic transmittion. the car won't start. the starter is good. It won't start from the key checked the switch and that to is good. I noticed if i probe the starter relay with a test light it starts with the key but shuts down after 10 seconds or so. please tell me what could be the cause of that. i noticed there is a security box under the dash if this is faulty could that cause the problem?
Thank you

do you have VATS, chip on your key, if so try cleaning that chip off real good, or try a different key if you have one..hope this helps