My truck door won't latch

This means the latch has failed.

Here is a guide that will help with this:

https://www.2carpros.com/articles/car-door-hood-or-trunk-will-not-close

https://www.2carpros.com/articles/door-panel-removal

I am attaching the info below that will help with replacing the latch as that is what we need to do in order to get the latch to grab the striker.

Please run through this info and let me know what questions you have.

Thanks