Most OBD2 readers have both capabilites.
The 1995 TBI is OBDI and requires an OBDI reader.
You should have a reader which must read OBD-I. While Some other readers, like the , ScanTool, Innova 3140 or Actron Cp9575 will often read both, and is provided with all of the adapters to diagnose the "older" vehicles.
Do you have the TBI or CPI injection? If yes you can post in some new thread to get your queries answered.

As a alternate method., why not trying a computer software to link your laptop to your car. This is done through a connecting cable which attaches through your USB port connector.

 

I bought at top10bestreports. It's really good

 

Ok so have a question, I'm trying to hook my OBD2 reader up to my bosses 95 Chevy Chyanne, do you know where id find the port for it? It should be similar you yours I'd think. If you have an idea I'd greatly appreciate it thank you

 

the obd2 reader wont work unless it can do obd1 and 2. but it should be right at the bottom dash below the fuse box

 

service engine soon light on hook up a obd 2 scanner no codes