SS1LE is spot on, there is no way they are going to fix power-train issues with mods....GM refused to even LOOK AT my tranny that was grinding 1-2 because it had been tracked.....They filed my car as "ABUSED" and that was the last time anything on the car was addressed. Maybe you get a cool dealer/maybe not, BUT if GM gets involved it ain't getting fixed. Look at the warranty forum here already, they won't even address cars that are missing paint and you think they are going to warranty a modded car LOL LOL LOL LOL