1980 el camino with a 1990-93 gmc v6 engine and transmission your question is how do you get the speedometer to read and also how do you get the transmission to show what gear it is in?

Answer 1

If the transmission a computer shifting transmission, then you need to hook up the eltronic speed sensor to be able to read speedometer. The gear reading is on the dash column, in which a wire hooks to the steering column.