Abnormal Brake Wear, What to bleed Options

[airforceb2cc]

I changed my pads a few years ago and I just started hearing the wear sensor squeel. I only drive about 5000mi a year so I took the tire off to see what was up. Only one pad is worn down and the rest are still new. My question is, do I just need to bleed the brakes or is there more that I'm not seeing here? If I just need to bleed, do I bleed the three that aren't stopping or the one that is?

Thanks,

Don

[airforceb2cc]

I got the new bracket in today and installed. I'm going to drive a week getting on the brakes pretty heavy (I usually downshift and hit the brakes around 10MPH) and see how the wear pattern looks. The caliper piston looked fine and wasn't cocked at all. Both pads were worn but the piston side was wearing at an angle so that leads me to believe I have a caliper problem. I'm also going to bleed the brakes this weekend. I have half a gallon of brake fluid laying around so I figured it wont hurt anything to do it...as long as the bleed ports aren't fused to the caliper.