The ecm is the engine control module. I'm not sure what a ecu is.
Is there a way to bypass the ECM in a 1993 chevy s10 4.3 vortec
The ECM on a 1992 S10 Blazer is located below the glove box.
under the dash
You don't have to, the ECM takes care of that.
Inside the dashboard, to the right of the glove box.
Behind the passenger side kick panel.
Behind the passenger side kick panel.
Yes it is.
You don't, it is done by the ECM (Engine Control Module).
The ecm would be in the passenger side kick panel.
It won't be a simple "plug and play" swap. You'll have to get your ECM reflashed, as the ECM from that 97 is programmed to work with an electronically controlled transmission, whereas the 1988 transmission is mechanical.
Under the hood, on top of the passenger side inner fender.