Tundra part number breakdown or decode

Is there a document to determine part number breakdowns for a 2004?

 

What parts are you looking for?

 

Frequently use this reference for part numbers....

https://www.toyodiy.com/parts/

On-Line Dealership parts catalogs can also be used but not complete. These folks are running a 5% discount on top of normal discount through 12/2. Promo code SAVE5.

https://parts.conicellitoyotaofconshohocken.com/

 

Thanks great site.

 

I was looking for some rear bumper step pads. I found a right pad 521630C010 for about $37 and another 521630C030 for over $110. Initially I couldn't find out which one but later figured out the ***30 was for a stepside. This just made me wonder if there was a way to decode the part numbers.