1994 LaSabre shifter stuck in park

If your 2007 Impala is stuck in park and the gear override silver button doesn't work, there may be a few potential problems that are causing the problem. Here are some common causes and troubleshooting solutions you can try: Brake light switch: The most common cause of this problem is a faulty brake light switch. The brake light switch is responsible for sending a signal to the shift interlock solenoid to release the shifter when the brake pedal is depressed and can prevent the shifter from releasing if the switch does not operate properly. Make sure your brake lights work by pressing on the brake pedal. If they don't work, it's probably a brake light switch issue that needs to be replaced. Shift Interlock Solenoid: The shift interlock solenoid is a mechanism that prevents the shifter from moving without pressing the brake pedal If the solenoid is faulty or a blown fuse can cause the shifter to go into park. Check the fuse connected to the shift interlock system and replace if necessary. If the fuse is good, the solenoid may need to be replaced. Shift Cable: The shift cable connects the shifter to the transmission and allows you to change gears. Damaged, loose, or misaligned cables can prevent the shifter from leaving the parking space. Inspect the shift cable for any obvious issues and make sure it is securely attached to the shifter and transmission. Shift lock control module: Some vehicles have a shift lock control module that ensures proper operation of the shift interlock system. Malfunction of this module can cause the problem. It may be necessary to use a diagnostic scan tool to check for any error codes associated with the module. Ignition switch: Faulty ignition under certain conditions

Make sure the brake fuse is ok. Without power to the switch the shifter will not shift out of park. Check your owners manual to find the emergency release button. Then check to see if it will start in N. You could have a shifter cable problem. In that case disconnect the linkage from the transmission and manually shift the transmission into the N position. Make sure that the e brake is set so that if it starts to roll you will be safe

Disconnect shift cable from transmission linkage and try to manually put transmission in drive gear ( make sure wheels chocked/park brake on ). If transmission goes into drive gear, suspect a shift cable or shifter assembly problem. If you can't manually shift into drive gear by hand with cable disconnected, suspect internal transmission/shift linkage issue

Do you have column or floor shifter ?
All automatic transaxle models use an electric park lock system. Within the housing assembly, a lock cylinder is connected to an actuator which rotates and engages on the electric park lock solenoid. When the floor-shift lever is not in the park position, the actuator disengages from the electric park lock solenoid slider. This allows the lock cylinder to move to the lock position. With the shift lever in PARK and the lock cylinder in LOCK, the actuator cam is positioned against the electric park lock solenoid slider. This prevents the shift lever from shifting out of the PARK position.
The column-shift automatic transaxle model uses a flexible cable actuator instead of an electric park lock system. One end of the cable is attached to the gate assembly. The other end of the cable is attached to the column mounted housing assembly. This system functions similarly to the floor-shift ignition lock system.
The manual transaxle model uses a push button lock cylinder. A clutch start switch is used. The clutch pedal must be pressed before the engine will crank. Refer to Park Lock System Check .
CAN you turn the key on ?
The gear selector does not shift out of PARK with the brake pedal depressed and the ignition switch in RUN.
Automatic Transmission Shift Lock Control Always On with Ignition in Run
Action
Value(s)
Yes
No

1

Was the BTSI System Check performed?
--
Go to Step 2
Go to Automatic Transmission Shift Lock Control System Check

2

Is this a column shift vehicle?
--
Go to Step 3 yes
Go to Step 4 no

3

1. Move the gear selector to the PARK position.
2. Disconnect the automatic transaxle control connector
3. Turn the ignition switch to RUN.
4. Connect the test lamp between terminal B and ground.

Does the test lamp light?
--
Go to Step 4
Go to Step 8

4

1. Disconnect the brake switch connector C2.
2. Move the ignition switch to RUN.

Can you shift the transaxle out of the PARK position?
--
Go to Step 5
Go to Step 8

5

Is the brake switch adjusted properly?
--
Go to Step 6
Go to Step 7

6

Replace the brake switch.
Is the repair complete?
--
System OK
--

7

Adjust the brake switch.
Is the repair complete?
--
System OK
--

8

1. Disconnect the BTSI solenoid connector (column shift vehicles) or disconnect the automatic transaxle control connector (console shift vehicles).
2. Move the ignition switch to RUN.

Can you shift the transaxle out of the PARK position?
--
Go to Step 9
Go to Step 10

9

Repair the short to power in CKT 1135.
Is the repair complete?
--
System OK
--

10

Test for sticking or binding in the shift linkage.
Does the shift linkage stick or bind?
--
Go to Step 11
Go to Step 12

11

Repair the shift linkage.
Is the repair complete?
--
System OK
--

12

Replace the BTSI solenoid (column shift vehicles) or replace the automatic transaxle control (console shift vehicles).
Is the repair complete?
--
System OK
Go to Step 1

brake lights will be ok as there is a different wire from the switch for the interlock system just jumper the wires at the switch you should see 2 different wire connectors

Sounds like the shifter is stuck in reverse or drive since it will roll.
I would set the parking brake and have someone watch the shift lever on the transmission to see if it and the shifter inside is still connected.

A common problem with these cars is the shift cable, they do over time stretch and it is obviously a main place to start, before you go out and buy a cable you may want to pull yup that shifter one more time and unclip the cable from it, after doing so spray a lot of WD 40 into the shift cable housing as they tend to run dry and bind over time as well as get old and just wear out, by dooing this you may notice a need to not replace the cable as the lube of it seems to work and is quite a cheap fix, along with this being said please take a visual of the side cover to the transmission where this cable and linkage bond together to complete the shifter process...do you see anything obvious, like a loose connection /clip broken, etc...try removing the cable from the transmission and see if it acts the same, if so it is in the cable or shifter mechanismn, if not it may be inside the transmissions "parking pall" device...something an experienced transmission repairmen should look at.
Also take a look at the brake switch mounted above the brake padal, that releases the cable from park only with your foot on the brake... if this switch isn't working properly it will cause havoc on the release of the shift from park, get a test light with the key on be certain the switch is sending out power to the release switch by simply hand pushing the brake pedal on and off and watching the power should respond at the same time as you are pushing the switch(brake pedal) on/off, if not replace it.
Happy Motoring!!

Check the brake lights to see if they are working. The transmission shifter gets an electric signal from the brake light switch telling it the brakes are on and it's OK to shift. If the lights are not working check the fuse. If the fuse is fine then check the brake light switch. It's usually located somewhere around the brake pedal.

If your shifter won't move at all a couple of things can be wrong. first if you are parked on a hill you have to push the car up the hill while someone tries to move the shifter. In a case like this there is too much pressure on the transmission to allow the shifter to move. Next the cable may be frozen or broken to check have someone in the car hold the brake down so car will not move and disconnect the cable from the transmission and see if you can shift the trans. If you can shift the trans the trans is fine. Now have the person in the car try to move the shifter while it is still disconnected. if it won't move the cable is probably bad. to find out you have to take the shifter apart to get to the other end. When you do this if the cable moves freely when off at both ends the shifter is the problem. Don't worry you normally don't have to do every test because you usually find the problem fairly quickly and the tests don't take a lot of time. Good Luck!

check for the brake switch if this doesnt work wont release from park if this ok then i will check the shifter cable check for power and ground