Sounds to me like your rear brake or emergency brake is stuck and or possibly something in the brake system is defective, worn out, broken or jammed. As to fixing it I dont recommend anyone working on brakes unless their qualified and certified. Simply put to many things can go wrong that would put yours or others life in jepardy for a novice to tamper with brakes. , EzForJesus
if your rear brakes are locking up under normal braking operations it could be contaminated brake pads/ shoes, faulty metering valve, or a bad proportioning valve, its hard for me to tell you exactly what it is but if you haven't fixed the problem post your symptoms on my message board i would be happy to tell you what exactly is wrong and how to fix it.
Type your answer here... how to fix a stocet rear caliper
To fix a parking brake that will not lock on a 2001 Sonoma install a new parking lever. The parking lever can be purchased at any auto parts store.
air lock in the poportioning valve
A brake issue such as a stuck e-brake cable.
Rear drum brakes, that lock up during heartbreaking quicker than the front brakes, can be adjusted. The rear brake pads need to be backed off.
Rear disc ? if it is rear disc brakes there is a drum brake in side of the rear rotor that is your parking brake and has an adjuster in it if you pull the rotor off.
In most instances both rear wheels. However some older cars only lock 1 rear wheel.
What cylinder? Master (brake) cylinder? Rear Brake cylinder? Lock cylinder?
You need a better question.... If its rusted to the rotor use PB Blaster to free it then replace brake pads. If the caliper piston is frozen then you need to rebuild the caliper.
the brake has seized take the wheel off and beat the brake with a hammer
Rear Anti-lock Brake System