2004 buick emergency brake

This car has regular shoes on the back not disc. Replace shoes and adjust cable. No parking brake is a sign of worn out shoes. Regals have rear disc on them for this year.

There is only one way to adjust the cable tension on that vehicle. remove the rear wheels, caliper and rotors, you will see the parking brake shoes, using the star adjuster, start turning in the direction that spreads the shoes apart and put the rotor on, the parking brake shoes should have a very light mount of drag when the rotor is put on. when each side is set correctly, the parking brake should have the proper tension.