I just bought this 2008 LT 2.2 hhr last month and just started driving it, well yesterday I notice the check engine light flash once and the car stuttered, then went back to normal it did it again 2 times. Well then I notice the temp gauge max out then go back down to normal and saw the dash say coolant mode on, then the car died I got the codes it was throwing anyone have a clue what's going on?

 

Welcome
Sounds like it ran hot and went into cooling mode. What was the actual coolant temperature ? If you don’t know, the coolant temp can be displayed in the info center.

 

From what I know it was never ran hot, the temp never goes over 198, also got a video of what's it doing
https://vimeo.com/1008082196

 

Ignition recall done? Link in my sig.
Push on all of the fuses and relays in both fuse boxes.
If the recall was done check all of the connections to the switch, might have been sloppy job.
check the connections on the outside of the under hood fuse box.
Check the electrical connection on the throttle body.

 

From what I see in the codes, plausible dirty throttle body, loose or burnt fuses, so possibly loose under hood fuse box bolts.
Tighten those bolts real tight and push all fuses and relays firmly into their places. I see voltage issues at tge ignition switch, but that might be a result of loose fuses

 

Yeah the ignition recall was completed in 2014, I did have a bad battery and just had it replaced thinking it was causing the issues. I will go over all connections after work.

 

A bad battery is often behind multiple weird electrical problems. The temp gauge bouncing around would be a good example.

You only showed three codes What was code 2/4?

 

All 3 of the posted codes are related. The run/crank relay and fuse are suspects as is the TB connections.
Ign1 circuit 2 runs the TB electronics.
Either something is making the ECT sensor to lie or the engine is getting up to 250F. Could be frayed wires.

 

I believe it was throwing a same code reason I didn't take a picture.

 

once I get home I will check all fuses and relays and connections just hope I can get this sorted out today got a long drive tomorrow..