I bought some baer brakes off craigslist a while back and didn't have time to install at the time. Now I want to get them on since I got new rims but the calipers and rotors are not labeled like front driver, rear passenger etc.
My question is does it matter which caliper goes where, or will I be able to tell the difference when I go in to swap them?

 

It does matter. The bleeder valve need to be up.

 

Yes. And the rotor rotates in a specific direction

 

OP, 1FastBrick and terravast4 have brought up some great points. To help with rotor rotation see this article from Baer. It explains which direction the rotors need to go and why.

It's also possible you could have different size rotors for the front than the rear depending on the kit. The calipers could be different for front vs. rear.

The truck in your profile pic appears to be of the 2000-2007(Classic) style. See the kits Baer offers for these trucks. For front systems click this link. For rear systems click this link.

 

Thanks for the replies. It's going on a 04 gmc sierra
Those links were very useful.

 

I have a old set of baer brakes in my garage. I will take some pics later if that will help you

 

if you have the alumisport that has the 14" rotor the calipers both have the same part number K247-185C stamped on the top , the passenger side has a 13 stamped in it and the driver has a 15 stamped in it just below the PBR logo on the top. This will put the bleeders facing up. This is for the fronts.

 

Here's a pics of what I have.
These don't have the pbr logo.
All the images I looked online that where like these have the pbr logo.
Could they be older model or knock offs?

 

Mine is the alumisport. Slightly different