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Is it shifter on the floor ?
Ignition Lock Cylinder Control Actuator
If the vehicle is equipped with a floor mounted console gear shifter, it has a ignition lock cylinder control actuator system in the steering column. The ignition lock cylinder control actuator's purpose is to prevent the ignition key from being turned to the OFF position when the transmission is in gear and the vehicle may still be moving. The column ignition lock system consists of a ignition lock cylinder control actuator , and a park position switch that is located in the A/T shift lock control switch. The ignition lock cylinder control actuator contains a pin that is spring loaded out to mechanically prevent the ignition key cylinder from being turned to the lock position when vehicle transmission is not in the Park position. If vehicle power is lost, and/or the transmission is not in the Park position the operator will not be able to turn the ignition key to the lock position and will not be able to remove the ignition key from the column.
GM had problems with these ! Has a TSB - technical service bulletin !
Automatic Transmission Shift Lock Control Description and Operation
The automatic transmission shift lock control system is a safety device that prevents an inadvertent shift out of PARK when the engine is running. The driver must press the brake pedal before moving the shift lever out of the PARK position. The system consists of the following components:
• The automatic transmission shift lock solenoid (serviced as the automatic transmission shift lock actuator), as well as the body control module (BCM) and the engine control module (ECM). The shift lock solenoid is located within the floor shift control assembly with vehicles equipped with floor shift.
• The BCM controls the voltage to the shift lock control solenoid through the shift lock control solenoid controlled voltage circuit. The following conditions must be met before the BCM will remove voltage from the shift lock solenoid:
- The ignition is in the ON position.
- The engine control module (ECM) sends an input via GMLAN serial data to the BCM indicating the transmission is in the PARK position.
- The BCM determines the brake pedal is applied according the brake pedal position.
Since the shift lock control solenoid is permanently grounded, the BCM supplies voltage to the automatic transmission shift lock control solenoid, mechanically locking the shift lever in the PARK position as the solenoid energizes. When the brake pedal is applied, the BCM turns the control voltage output of the shift lock control solenoid OFF, de-energizing the shift lock control solenoid. The de-energized solenoid releases the mechanical lock allowing the driver to move the shift lever out of the PARK position. When the transmission is out of the PARK position, the shift lock control solenoid remains de-energized.
During remote start operation, the BCM will energize the shift lock control circuit, locking the shift lever in the PARK position.
Replaced shifter on a cobalt , broken plastic part inside , wouldn't press on micro switch to disengage ! Found replacement shifter at auto slavage yard .$20.00 US
the neutral safety switch. If the shifter is on the floor then the switch is either on the transmission itself or under the console on the shifter. If the shifter is on the steering column then that's where it should be, once again unless its on the transmission. Your switch is faulty theres no fix other than replacement.
The Neutral Safety switch monitors the position of your gear selector lever and either interrupts or allows the starting circuit in your car or truck to do its job. On newer vehicles it may also monitor the position of the brake pedal to make sure that the vehicle is in park or neutral AND that your foot is on the brake.
If your vehicle is equipped with a neutral safety switch, it should NOT start UNLESS the transmission is in Neutral or Park. On the other hand your vehicle SHOULD start when it is in Neutral or Park. If your car will start in Neutral but not in Park, you have a bad switch. Also, if your car or truck will only start by turning the key to the start position and wiggling the gear selector lever, your neutral safty switch is in need of replacement.
The nuetral safety switch is usually found near the gear shifter. If your car has the gear shift on the column, then the neutral safety switch is usully mounted on the steering column near the brake pedal. On floor mount or console mount vehicles you will find the nuetral safety switch mounted near or on the shifter mechanism.
on each conventional auto transmission equipped car there is a steel wire/or a connection mechanism from shifter to transmission. sometimes is goes out of adjustment. you need to adjust it.(or goes loose)
yours is in steering column. actually back of steering column. there is a bracket. it must be loose. you will need to remove steering column panel first to reach it and you will see those bolts. you will need to be at your back when you are trying to reach it. you will need torx 27 ( i guess) find a good flash light to see the space.
i hope this helps.
ps. someone needs to hold shifter while your are adjusting.
CHECK BRAKE LIGHT SWITCH MAKE SURE BRAKE LIGHTS IS ON.IF NO CHECK BRAKE LIGHT SWITCH FUSE IF POWER GOING TO BRAKE LIGHT SWITCH AND BRAKE LIGHTS DONT WORK REPLACE BRAKE LIGHT SWITCH.IF BRAKE LIGHTS WORKING.PROBLWM COULD BE IN BRAKE TRANSMISSION SHIFT INTERLOCK SOLENOID.REASON I SAY CHECK BRAKE LIGHT SWITCH.WHEN YOU DEPRESS BRAKE PEDAL THE BRAKE TRANSMISSON SHIFT SOLENOID ENERGIZE SO YOU CANT GET CAR OUT OF PARK.
The range sensor will not cause the shifter to not come out of park. Check to see if your brake lamps work. There is a solenoid that is energized when the brakes are applied to allow the shifter to move from park. I would check fuses and the braek switch first before replacing anything. I hope this helps. Good luck.
When you turn ignition on it releases a cable that is attached to the shifter also the shifter has a solenoid attached to it that is released when you step on the brake. Both times that I had the problem of button stuck and cant shift out of park the solenoid was sticking and wouldnt release .
I cant get the key out or lock steering column and the automatic transmission shift lever locks up in park. Now if I take the battery off every thing works fine. This sure seems like a reset problem.I run the car by not having it in the locked column position and get the shifter to work by putting a key in the hole furnished by chevy to bypass shift lock. thank you