They told me to get an accelerator pedal?

My car recently broke down. I had some mechanics look at it and they said that it needs a new accelerator pedal and fuse box. (I understand them to be honest people btw). I didn't want to have to pay so much to get it fixed, so I figured I'd save some money and fix it myself. They told me to get an accelerator pedal from either AC Delco or directly from Chevy. They also said the fuse box I need has the serial number 84446208. They said the fuse box is expensive, but also that I might be able to get it from a junk yard if it's still in good condition. I will post the links here. Are these the right parts? (I should note that 404 is not my actual mileage, I just didn't want to figure out what it actually was).

https://www.gmpartsdirect.com/oem-parts/gm-rear-body-fuse-block-84446208
https://www.amazon.com/ACDelco-13252702-Original-Equipment-Accelerator/dp/B010GNUVHW