What Code Reader/Scanner to Buy?

[LBJ]

I have just seen a problem light appear on the instrument panel. It's the engine symbol that indicates I have a new problem somewhere in the engine. Now, what is the name brand of a good scanner to connect so I can determine what the problem is? I bought an EX-SCAN 3000 back in the 90's for my 1991 GMC P.U. and it's now WAY out of date and Autoxray no longer is in business as I've read. Looks like it's a piece of junk now. I have a 2004 Chevy 5.3 V8 in a Silverado Ext Cab Z71. Thanks. LBJ