Hello,
This issue is likely caused by the parking brake switch.
The switch is probably shorted out to the 'on' position and triggering the light on the dash.
It is located under the parking brake lever.
To access the switch you will have to remove the trims around the parking brake handle.
I have attached a diagram for a Saturn Ion, which is very similar to the Astra.
Please let me know of any questions.
Thank you.
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Wednesday, September 22nd, 2021 AT 12:07 PM