ECM/Pcm Location
WARNING: This page is about a different car, the 1994 Cadillac Fleetwood. However, it is still accessible from the selected car via links, so may be relevant.
On most models, engine control module is located behind right or left side of dash or behind right or left kick panel. On Grand Prix and Lumina, control module is located on right side of engine compartment. See COMPONENT LOCATIONS in SYSTEM/COMPONENT TESTS article in this section.