Transmission will not shift into reverse

The pressure switch could be the issue, but the most likely issue is the fluid, so we need to start there.

Let's check the fluid and find out if that is full and in good condition.

https://www.2carpros.com/articles/how-to-check-and-add-transmission-fluid

If it is, then we need to move onto check the line pressure to find out what the next steps are.

You can try and replace the switch but at this point that would be a guess so I would suggest running through this material and let us know what you find.

Please let me know if you have questions and we can go from there.

Thanks

i have not had a chance to change transmission fluid since the holidays and all. glad it's over. can get back to it.
one more thing i would add to this is the reverse light do work when i put into gear.

Okay. That is just showing that the transmission switch is working, and the control module is seeing that reverse is being commanded. It also confirms that this is most likely an issue with what was talked about prior.

Let us know what the fluid looks like when you get to it. Thanks for the update.