So it appears that my driver's side rear brake caliper is seized
I can't turn/open the cylinder far enough for the new pads to fit.
I already ordered a new caliper but Powell tells me the banjo bolt washers may be harder to find.
Does anyone have a part number and/or source? Thanks!

 

I believe I got mine from Tom @CrateEngineDepot and I know I got extra ones but I'll be damned if I know where they're at.

 

Are you talking about the copper crush washers? If so I would just measure it and get a kit like this that has something close in it. I use these all the time on various applications. Even if you don't have the exact original size as long as you can get the washer centered and it is sandwiched in between the mating surfaces it will work just fine.

 

Acdelco 24430175 is the factory number but like jdbaugh said, you can measure the copper washer and buy close to the same size and itl work.

 

Thanks guys! I remember that when my shop installed the SS brake lines there were issues with leakage which is why I was concerned.

 

I one time bent a banjo bolt (don't ask how) but that was the only time I have ever had any issues with them leaking. I keep copper crush washers around because they are cheap and I like to use fresh ones any time I remove a banjo bolt. Main thing is ensure the mating surfaces are clean.

 

I have just learned that gm has discontinued those washers so it may be hard to find. If you do get a factory one get the measurements before installation so I can do some research and find alternatives for the future.