Ok so today in the morning when I first started my the G it started perfectly fine so I drove it to QT to get something to eat and when I came back to start it, it had trouble starting and took a few tries before I actually got it to start. Then the service engine soon light came on. What could it be? I'm tryna fix this as soon as possible. )):

 

The ECM already told you the problem, that's why the service engine light is on. Go get it scanned.

 

It's frustrating to read over and over on here members tell us the SES light is on, the car has this problem or that then ask what's wrong. If there was a way I could beam the concept of "SES light is on I need to get the ECU scanned for codes to tell me what the issue is" into the collective consciousness of car owners I would in a heartbeat.

My guess is you'll get a P0340 or P0345 code. Head over to Google to see what these mean, we expect members to do a little work on their own to figure out problems/fixes before you come to the forum and just ask us to spoon feed you answers. Not only is this a give and take forum but searching for answers before you flood the forum with questions that have been asked and answered thousands of times over the 17 years we've been here is also a forum rule which can result in disciplinary action by the staff if violated. I'm not trying to scare you OP, I'm just explaining how this place works. Put in some effort on your own and we'll be glad to help.