Emergency Release of Parking Brake
If the engine will not start and you want to release the parking brake, do the following:
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block the wheels
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turn the ignition switch to the ON position
Notice: Do not crank the engine for more than 30 seconds at a time during any of the following procedures. Wait two minutes after each try to allow the starter to cool. Failure to do so could cause starter damage.
Use the ignition switch to turn the engine over several times with the gear shift selector in the Neutral (N) position and the parking brake knob in the released (pushed) position.
Note: The emergency release will not work in all cases. The system requires hydraulic fluid to provide pressure for the procedure to work. Since the system is pressurized when the brake is released, the parking brake will come back on in 10 minutes, or longer depending on internal pressure.