Sounds to me like a caliper may be sticking. Had this problem on a couple of other vehicles in the past. You can buy a caliper rebuild kit at your local parts store, but I've never had much luck with it. Another possibility is a line is collapsing. Brake fluid will break down the inner lining of rubber lines over time. I wouldn't think that would be the problem with an '05 though.

 

If you decide to change out, go with HAWK pads and rotors.. Spend a lil more up front, but they are an upgrade for the HD trucks... Cheaper than Brembo...

 

You could try to sand the brake rotors to reduce the glaze. I have done this every pad change and never had a squeak

 

Lubricate the caliper slides with the anti squeal grease and that will probably cure the problem

 

That's what worked on my 01 Dodge