[leroybrown911]

At risk of sounding stupid, have you got drum brakes on rear? Do you have some pedal? just not very good brakes?

If so the self adjusters may be worth a look. I have had similar issues on VWs. After fitting new pads, shoes and discs and bled the system, I had no pedal due to one self adjuster not moving as it should.

I am not familiar with Sierra drum brakes, however they are probably similar.

If this is the case, move the self adjuster manually with the drum off the car. Adjust it up so the drum fits just nicely over the shoes and then replace drum.