There seams to several forum comments on lack of pedal firmness. My GTO actually feels like the brakes need to be bleed again because the pedal pumps up and is firmer with the second application (yes I have an appointment). Definitely not as firm as my Z28. Seen some other posts that have shown darken fluild after a few months with the feedback that flushing and switching to synthetic made a noticeable difference. Does anyone know if there are any technical bulletins regarding the GTO's brakes or found ways to improve the stock system?