The first thing to do is get it scanned to see what code it set and stored. It may not even be a trans issue. You have a warranty use it before you really do need it. I have seen little issues that turn on the SES light be ignored and turn into big ugly issues. Dont wait get it checked out! The only issue I have had with my 09 GT is the fuel cap likes to work it self loose and turn on the SES light. All the GM 6 speed auto's have quirky shifts at times. My 2011 Tahoe is terrible I wish it had the same program as my G8 as the G8 trans works so much better.
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69 GTO Judge
69 Firebird Trans Am clone
76 Trans Am 400 4spd.
06 GTO M6 18's red/red - 1 OF 188.
09.5 G8 GT Stryker blue met. premium with sport pkg.
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