my 2011 Aluminum Specialized Stumpjumper HT Comp creaks a lot when pedaling, especially from a standing position. I tried changing the BB, greasing the cranks etc. but nothing helped. When I removed the cranks and BB and pushed on the frame from the side the noise was the same as when pedaling so i think it has to be the frame creaking. The frame also did not seem very stiff when pushed on like this (compared to my road bike and cheap dept. store bike).
From what I remember, the creak was always there. I tried looking for possible cracks in the frame but found only surface level chips in the paint. Can I do something about this? Should I be worried?