Noobie here! Just bought my first truck. Some Questions!

Well I just bought my first vehicle,  a 1994 chevrolet W/T 1500 pick up.  I have a few questions about it though so if you wouldnt mind giving me some opinions tips or answers I would greatly appreciate it! Sorry if I sound like an idiot but I need to know!

 Is a "1994 chevy W/T 1500" pickup essentially the same truck as a "1994 C/K 1500 pick up"?  Because when I am online looking for parts or whatever and I am searching by vehicle the W/T 1500 pickup never shows up only the "silverado 1500" and the "C/K 1500" pick up show up.  Which vehicle is the correct one to choose if I want to buy parts.

 I also want to buy a new deck because I don't even own any cassettes. Are most decks universal and will fit in my truck?

Cheers  

W/T 1500 and C/K 1500 are the same platform yes.  W/T stands for "Work Truck" meaning they're more plain than their C/K brothers.  Decks are generally usniversal fit, you will need to get the old one removed and possibly a new piece for your dash.  The best place to start with your W/T is to update the grille/headlights it will make your truck look like a newer C/K.  Have fun!  
-Cody