Can a OBD2 connector replace obd1?

[Caman96]

I honestly don’t know that much about this, other than my gut feeling is swapping in an obd2 port wouldn’t do anything, meaning you’ll still have obd1. I think it was @someotherguy who recently posted that some(very few) 95’s did have obd2 though.

 

[someotherguy]

I had a95 s10 blazer with obd2 plug from the factory. It was an obd1 truck. I had a cable for that combo that came with my aldl stuff so I could read obd1 data. They are wired differently than the obd2 computers. 1 year oddball and the only one I've seen. All the rest of the 95's I've seen were obd1 plugs

Sounds like OBD 1.5 to me. Some 1994-1995's (and in my experience, not any gmt400's)

Richard

 

[Moofus02]

7427 computer with obd2 plug. Aldl came with both cables for that purpose. Data logged like obd1. Only truck I've ever seen with that combo

 

[GoToGuy]

Before the implementation of OBD 2, late 94, 95, have OBD 2 style plug. But is OBD 1 computer. And early 94 and prior have rectangle OBD 1 plug. So some scanners have a OBD 2 style plug but moulded into the plug is "OBD-1 ".
Make life easy for now and the future. Use the parts that match. Think about how hard it would be to try and and scan with mismatched parts. Apples with apples, oranges with oranges.