oem

what does oem stand for?
and where is the ecu for a 90 teg ls automatic
sorry if it sounds like rookie questions but any help would be appreciated

OEM = Original Equipment Manufacturer

The ecu is in the passenger side front footwell. Pull back the carpeting up under the dash in the footwell, and you should uncover a gold-ish steel plate, unbolt the plate, and underneath is the ecu. The plate actually has a hole in it, so you can see the LED on the ecu to indicate error codes.

oem

thanks alot i appreciate it