What is the 2005 Pontiac GTO “system check”?

pontiac
gto

#1

On 2005 GTO, what exactly does the SYSTEM CHECK do?
I have the full service manual and nothing is mentioned?
Thanks
Lou


#2

The car is “checking the system”… or is that too obvious?

You home computer doesn’t just start right up with a blink, now does it? Neither does the computer in your car.