Front brake pad replacement?

Here is how to change the front brake pads on the chevy lumina which is the same car, if you want to change the rotors (recommended) remove the caliper mounting bracket and brake pad carrier. Here is a generic guide to help you step by step with instructions in the diagrams below to show you how on your car:

https://www.2carpros.com/articles/how-to-replace-front-brake-pads-and-rotors-fwd

Check out the images (below). Let us know if you need anything else.