* Source a manual trunk latch assembly: This will likely require finding a used part from a similar-year Cadillac or possibly another GM vehicle with a compatible trunk latch. You'll need the latch itself, the exterior handle, and any internal linkage components.
* Modify or fabricate mounting points: The power latch and the manual latch will almost certainly have different mounting points. You'll need to either modify the existing holes or fabricate new ones to accommodate the manual latch.
* Disconnect and remove the power components: This includes the motor, wiring harness, and any related electrical components. You'll need to properly disconnect the wiring to avoid short circuits.
* Reinstall the interior trim: Once the manual latch is installed, you'll need to reinstall the interior trim panels.
This is not a straightforward job and requires mechanical aptitude and some fabrication skills. It's likely more involved than simply swapping parts. You might find it easier to repair the existing motor if the problem is not too extensive, or source a used power latch assembly as a replacement. Checking salvage yards or online parts suppliers for a used power latch may be the most cost-effective and less labor-intensive option.
