stant rad cap

what is the correct rad cap for my 1996 chev 4 door blazer it has a 4.3 w engine

A 16 psi will work just fine.

Stant Model 11230 or 11330

11230 is a normal sealed cap

11330 is the cap with the pressure release lever

They are both available from Advance Auto:

11230 is $4.68:
http://www.partsamerica.com/ProductDetail.aspx?mfrcode=STB&mfrpartnumber=11230&parttype=116&ptset=A

11330 is $5.68:
http://www.partsamerica.com/ProductDetail.aspx?mfrcode=STB&mfrpartnumber=11330&parttype=116&ptset=A

I use the 11330, because if I have any problems, I like the ability to relieve the pressure without having to worry about getting burned.

Model 11330 may also be available at Wal*Mart.

what if i got a 11331 it is a 16 lb cap and it fits

I would go with the part numbers that Blazee mentioned.

I go by the KISS principle

Keep It Simple Stupid

I use the most simple part to get the job done. The more complicated the part, the more it is apt to fail.

That is why I use a 11230.