2006 F150 Lariat brake pedal squeak
 

Can't really tell for sure if it's squeaking inside cabin or under hood near firewall. Anyone else had this problem? Any advice?

I think I know the fix if its the same squeaky sound I had on my 04. I had this issue and had a complete brake fluid flush done, no more squeak.

Wow
 

I never would have thought of that. I will certainly give it a try. Thank you.

A couple years ago I found a You Tube video, it was the same noise as mine made and that was his fix, so I tried it and it worked. Thought I book marked it but I cant find it.

Squeaky brake oedal
 

I looked at my break fluid. It's not clear, but it's also not real dark. I just got the truck, so who knows how old the fluid is. Thanks for your assistance.

I had same issue, replaced master cylinder. No more squeak.