Crank Noise???
 

I just picked up a slightly used 2012 Giant Defy 1 tonight. I took it for what I thought was a good test ride, about 5 miles with some rolling hills. All was good. But on the way home I had a short steep hill to climb, and as soon as I stood up on the pedals I started hearing a noise from the crank area. I couldn't tell for sure if it was a rub or a creak, the noise was difficult to describe. I went up the hill in both the big and small front chain rings and the noise was the same either way, so I'm thinking bottom bracket maybe??? The only two components replaced on the bike before it was sold to me were the bottom bracket and chain. The shop owner said it felt a little rough on one side when the bike was traded so he replaced it. Receipt says it's a BB91-B Press Fit Road Bottom Bracket. This is the newest bike I owned by far so know nothing about press fit BB's. Any thoughts would be appreciated.

Most common is pedal/crank or crank/spindle interface. I would remove both, wire brush pedal threads and clean out any rust scale or other contamination from crank and spindle flats. Reassemble with grease on pedal threads and barely any lubrication on the spindle flats (the minimal grease left on your fingers after you wipe them is enough). Reassemble, tightening very firmly. A torque wrench is fine if you have it - look up the numbers or someone else will provide - I've never used one on a bike. Even if they aren't the problem the above is good preventative maintenance.

IF that does not fix the problem then it's chainwheel bolts, bottom bracket/shell interface, pedal cage, etc.

Thanks for the reply. Goofed around a little trying to diagnose and I have no idea. It's really hard to tell whats going on when the noise only occurs under load. Dropping it off at the LBS where I bought the bike a few ago tomorrow for the pro to test ride.