Hi,
If you can't shift into park, first confirm there isn't an issue related to the shift linkage. The Holden isn't available in the US, but I believe the Chevrolet Captiva is the same vehicle.
The shift linkage (cable) will be mounted on the transmission range sensor and it is adjustable. Check to make sure it is not out of adjustment or if something is preventing the cable from returning to park.
Here are the directions I have for adjusting the cable:
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2013 Chevy Truck Captiva Sport FWD L4-2.4L
Range Selector Lever Cable Adjustment
Vehicle Transmission and Drivetrain Automatic Transmission/Transaxle Shift Linkage Shift Cable Adjustments 6T30/6T40/6T45/6T50 (MH7, MHJ, MHK) - Automatic Transmission Range Selector Lever Cable Adjustment
RANGE SELECTOR LEVER CABLE ADJUSTMENT
Range Selector Lever Cable Adjustment
Warning
The automatic transaxle range selector cable is made out of two cable sections. After initial connection never separate the two metal couplings from one another. Integrity of the connection of the two metal couplings will be lost if separation of the two metal couplings occurs. When servicing the transaxle remove the cable at the automatic transaxle range selector lever and at the automatic transaxle range selector cable bracket. If either section of the cable needs to be replaced, replace both of the cable sections. Loss of connection integrity of the two metal couplings can cause loss of transaxle shift control which could result in personal injury.
Note:
Adjust the automatic transmission range selector cable while the transmission and the gear selector are in the Park position only. Failure to do so may cause mis-adjustment.
1. Set the park brake and chock the wheels.
2. Verify the transmission range select lever is in the park position.
3. Verify the transmission manual shift lever is in the park position.
Pic 1
4. Release the range select cable adjuster clip (1).
Pic 2
5. Slide the two halves (1, 2) of the range select cable together until all free play is removed.
Pic 3
6. Depress the adjuster clip (1) locking the adjuster clip completely.
7. Pull both halves of the range select cable in opposite directions to verify the cable adjuster is secured.
8. Check the transmission range select lever in all gear selections for proper operation.
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If that appears to be okay, there could be an issue at the shifter itself. There is a shift interlock component that may be preventing it from returning to park. See pic 4.
Let me know if this helps.
Joe
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Saturday, March 7th, 2020 AT 6:32 PM