I need to replace bearings and seals on the front left side?

Hello, I'm Danny.

Here is the information you requested. You must first remove the CV axle to gain access to the differential bearings and seals. Here is a tutorial showing how to remove and replace CV axles:

https://www.2carpros.com/articles/replace-cv-axle

I've attached picture steps below on how to replace the front differential axle bearings and seals on your truck. Hope this helps and thanks for using 2CarPros.