so i was driving tonight and i got on it from first to third. as soon as i hit second gear my CEL went on. so i started to freak out, then i drove normally for about a half a mile and it went off. Has this happened to anyone? i only have about 2200 miles on it

 

get it scanned. otherwise no one can help. can be something as simple as you got gas and didn't screw on the cap tightly. can be anything. but without knowing the code no one can give you any useable info.

 

I had almost the same issue....i shifted remotely hard from first to second with traction control off...CEL came on for about 2 seconds so i imediatly got off the throttle and havent seen it happen again since....car had no codes from it either. odd if you ask me quick on and off

 

call on star have them run a vehicle diagnostic... More then likely it was a misfire

 

I had that about 1,500 miles. Onstar said it was a misfire. I reset it and it hasnt been on since. Ive got about 4k now.

 

Was your engine not fully warmed up? I have heard of this before with a cold engine.

 

good point. i would say it wasnt completely warmed up.

 

this has happened to me when the car wasnt fully warmed up.. keep it on for 5-10mins before no lift shifting