Perhaps this thread {with photos} will help.....
Opening trunk without keys & trunk release doesn't work by benoitmalenfant
https://www.fiero.nl/forum/Forum2/HTML/139858.htmlI
believe you will pull the whole assembly {plastic dust cover / support / lock} from the lid and the latch first and the 'tail' of the lock will slip out from the latch
Then you can work in the lock on the bench.....
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Original Owner of a Silver '88 GT
Under 'Production Refurbishment' @ 136k Miles
[This message has been edited by Vintage-Nut (edited 10-20-2024).]