Engine starting problem

Any Chevy techs here? My '02 Malibu is having trouble getting started in the mornings. It cranks over fine and wants to run, but when you release the key it immediately dies. This will happen about five times, then it will start and run with no problems. It has 50,000 miles and is the V-6. The theft light is not flashing, the check-engine light is not on, and a code reader shows no codes stored.
Any ideas?????