It's been a few days... Really hoped someone could have helped...

I think you'll find very few people with passion for a Holden are interested in stuff not built here (unless it is built in North America!). For example, I've had GMH/Holden stuff all my life but when my last Holden ute that could tow anything (VZ Cross8) was to be retired I bought a Toyota rather than a Colorado and now have a Ram, not because the Colorado itself was junk but the engines were too small. So unfortunately it is probably unlikely this is the right forum for help on your query. I do not know of any dedicated Colorado groups either, totally out of my realm of interest. Walkinshaw were geared up to start converting and selling Colorados with LS3 and LSA engines but when Holden pulled the plug so did they.

There are still some Holden service at dealerships that had other vehicle brands, they are keeping those around for a while for warranty on the last of the imported stuff Holden sold. If you can find someone that works at one of those still they will have access to workshop manuals with wiring diagrams.

Where you might find some traction is with someone in Thailand where these vehicles come from. You might even find new parts. I found the full wiring diagram for my 2011 Thai/Japanese Hilux online.

Thank you for that!