2000 Bonneville Stalling problems

I have a 2000 SSEI Supercharged bonn and it just started to die for no reason. No codes or anything. First it started to do it on the freeway at 65mph no it does it on the side streets in any driving condition. Where should I start. The car starts right back up after it dies with no problems.
Thanks

This is very hard to diagnose since the engine will immediately start back up after a stall. Sort of hard to check for fuel or spark under these conditions. Another possibility would be loose or corroded battery terminals. Check the terminals for corrosion, then clean, lubricate & tighten. (Good preventative measure)

cheeck with the more obvious things first, spark to each plug, loose connections, fuel pressure readings, ect..... Once you have a bit more info., we can help you with your diagnosis