Vehicle cranks, when brake is pressed the gear shift will not move

If you're unable to push the gear shift into neutral in a 2007 Chrysler 300 when the car battery is dead and the key has stopped working, there is a solution that can help. You can locate the shift interlock override mechanism to manually put the vehicle into neutral. First, remove the plastic cover or cap located near the gear lever to reveal the shift interlock override slot. Insert a small screwdriver or a similar tool into the slot and apply gentle pressure while simultaneously attempting to move the gear lever into neutral. This should release the shift interlock mechanism and allow you to shift the car into neutral. It's important to exercise caution and consult the vehicle's manual for precise instructions tailored to your specific model, as the process may vary slightly.

Modern vehicles have what's called a shift interlock system. This safety mechanism prevents the gear shift lever from moving out of the Park position and into a moving gear position unless the brake pedal is pressed. The components that make this happen are the brake switch near the brake pedal and the shift interlock solenoid in the shifter assembly. The brake switch is also used to illuminate the vehicle's rear brake lights upon vehicle braking, so it gets used a lot. This frequent usage makes it a prime suspect over the interlock solenoid for being the culprit. I'd recommend having someone check to see if you have brake lights the next time the issue presents, or if you'd rather guess at a repair, consider brake light switch replacement. You can read about how to replace a brake light switch here: https://www.yourmechanic.com/article/how-to-replace-your-brake-light-switch-by-spencer-cates

This would be the shift linkage bushing, very common. When switching through the gears, the gear selector lights in the dash probably don't move from P.

Vehicle has shift lock system .won't let it move from park unless the driver has brake pedal pressed . Do the brake lights work ? Does your saturn have console shift or on the steering coulmn ? There is a electric solenoid that locks the gear shifter lever . could be bad , or wiring .

Vehicles have a safety system that won't allow gear selector to be moved out of park unless brake pedal is pushed ! This what Buick calls there's
Automatic Transmission Shift Lock Control ! Depending on make of your vehicle it mite be called something else . But all vehicles have it.
The automatic transmission shift lock control system is a safety device that prevents an inadvertent shift out of PARK when the ignition is ON. The driver must press the brake pedal before moving the shift lever out of the PARK position. The system consists of the following components:
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The automatic transmission shift lock control solenoid

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The automatic transmission shift lock control switch

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The brake to shift relay

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The rear integration module (RIM)

With the ignition in the ON position, battery positive voltage is supplied to the brake to shift relay coil. When the RIM energizes the brake to shift relay, the brake to shift relay switch contacts close suppling battery voltage to the automatic transmission shift lock control switch. The circuit continues through the normally closed switch to the automatic transmission shift lock control solenoid. The permanently grounded solenoid is energized. This locks the shift linkage in the PARK position. When the driver presses the brake pedal, the contacts in the automatic transmission shift lock control switch open. This causes the automatic transmission shift lock control solenoid to release. This allows the shift lever to move from the PARK position.

Check to see if brake lights are working when you step on pedal...if not you may have a bad brake lamp switch on the pedal shaft.if the shifter interlock doesn't see power out of the switch it won't allow you to shift out of park. It's a safety system to prevent anyone from shifting into gear when they might be pressing gas pedal. If you're stuck, sometimes you can turn key on to just before dash lights come on, put vehicle in neutral and start and shift, but be careful because you may not have brake lights and could cause an accident or possibly get pulled over.

you have to press the brake pedal on any vehicle generally to shift out of park as a rule, it keeps youre car from moving as your shifting it in to gear.

You need to give us a better idea of your real problem. Does the engine crank over? Does the engine start? Is the vehicle failing to go into gear?

One part that can be intermittent is the Interlock switch on the Brake pedal lever. If this switch fails to light-up the Brake lights, you may not be able to crank the motor, or shift it.

If the engine starts and runs, but does not shift into gear, your foot needs to be on the Brake pedal. It needs a signal from the Brake switch Interlock to allow shifting of the gearshift.

The Brake pedal Interlock switch can be loose or cracked and it will give you the problems you are having.

Please comment on my info.

Can't say for sure but if you get no other answers you may want to check any brake pedal switches.
Lot of vehicles have electric solenoids that lock the shifter until the brake pedal is depressed.
When you press your brake pedal, do you hear a click?

I think you should buy repair manual first for your vehicle after that it will be easy for you to solve the problem. Check the link may be you will get something useful here