Hello all, I am new to the site and must say I am very glad I found it. I recently purchased a '03 with a 6-speed manual. I had a 7.3 power stroke before with an exhaust and chip system installed. The power stroke was still pushing you into the seat at 80-90. My duramax seems to fall on its face about 80...it also make a ticking...knocking sound from the right side just in front of the passenger side door. This sound is bad enough my wife when she rides in the passenger seat says the floor vibrates....the chevrolet dealership says that is normal diesel sounds...any ideas? Also does anyone have the "edge" system with a standard transmission....how do you like it?