You might have a problem with the transmission. I think there have been software updates since the first cars were released. You probably have factory warranty. Take it to a dealer and complain. Or go test drive a new LS auto and see if they feel the same.
I have an LS manual and the power feels adequate. I get a steady 36 but I don't have any stop & go driving.
I have an LS manual and the power feels adequate. I get a steady 36 but I don't have any stop & go driving.