How do you fix rear brakes on 1994 Chevy G20 van?

Brake jobs are not a job to be done without a Manual. Your life and the lives of others and the life of your Automobile depend on them.
[http://www.themotorbookstore.com/vans.html?page=0 Please purchase a Manual and do the job correctly] or take it to a shop. Good Luck and Remember.
Change Your Mind, Not Your Oil.
Use the First In Synthetic Motor Oil's.
See My Bio For Information & Contact Details.