Hello. Bypassing a parking brake on a Pioneer radio requires an interface. You can not just ground the parking brake wire. You can buy them on Ebay or Amazon.

The key is probably jammed into the ignition by the parking brake you put there

2001 #2500 series rubber gromet on backing plate , remove , parking brake adjustment shoud be visable . use brake adjusting tool to rotate star wheel on inturnal parking brake to losen P. brake. then remove brake rotor and pads check P Br. shoes alot of work! mike s.

Parking brake will not release even manual will not work on 1994 cadillac deville

Chevrolet Blazer parking brake can be adjusted with the adjustment screw on the parking brake pad. The parking brake can also be adjusted with the parking brake cable.