In the fuel tank.
ecu? Do you mean ecm, Engine Control Module?
Behind the left of the steering column under the instrument panel.
Pass lock security was not installed on 1991 GM cars. I believe it was 1997/98 it was first installed
brake vacuum line location on the 1991 oldsmobile regency 98
The DRL module is right under the dashboard to the right of the steering wheel. It is a small metal box similar to a PC's heat sink... It is very difficult to remove. I believe the easiest way to remove it is by bending the metal tabs that hold it into place. This is not the module , it is the diode, as per wiring diagram, it is a double diode with heat sink, it is removable as stated and unpluging will disable drl,s It has only two wires one orange and one yellow. The module is a small circuit board that plugged in to another component and has 8 tabs/connectors about 2 inch square and on half inch thick. I cant find it either.
A motor from a 1991 Oldsmobile will fit into a 1996 Oldsmobile Delta 88. The motor mounts will need to be changed.
On my 91 Regency I replaced the computer and now the air is flowing again
where is airbag module 98tacoma
You may find that the turn signal switch in the steering wheel is bad.
i have 1991 olds 98 warm temps heater fan works great 10 degree or lower the fan will not blow warm air put hand to defrost feels warm summer months fan works great
Where is the door lock module for 98 chevy Remote