I looked at the gm trouble codes (troublecodes.net) But I have a 92 4.3 Vortec CPI with W vin, should i just use the 93-95 W vin codes? No 92 4.3 W vin listed.
Did the paperclip method of getting codes, but not sure if I understand them right, each code should blink 3 times? 12.12.12.23.23,23,45,45,45 ?*thats what i got apparently, unless i read it wrong.
I found the ODB2 codes section but not a ODB1 codes section on here.

 

Yes, the codes repeat 3 times for each code. Troublecodes.net lists the trouble codes. You should use the 93-95 Vin W codes. Here is what they stand for:
Code 12 = Diagnostic Mode
Code 23 = Inlet air temperature sensor signal showed an air temperature of -29F for 4 seconds. (likely a disconnected or faulty IAT sensor)
Code 45 = Oxygen sensor voltage was over 0.750 volts for 2 minutes in closed loop operation with a throttle angle between 0.6 and 1.9 volts. (indicates a rich exhaust mixture which could be from a leaking FPR, a faulty O2 sensor, or some other issue).

 

Ok, I did do it right....YAY, the code 23 was my fault, I ran it to check for leaks after replacing the thermostat and coolant temp senor for leaks without the breather hose and sensor hooked up and forgot to clear the codes. Now it looks like I have to replace, the O2 sensor, that was mentioned when I bought it but wanted to pull the codes to know all the issues and what order to start.