Electronic Control Module (ECM): 2.5L
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 1992 Pontiac Grand Am, 1992 Oldsmobile Achieva, 1992 Buick Skylark, 1991 Pontiac Grand Am, and 1991 Oldsmobile Cutlass Calais. However, it is still accessible from the selected car via links, so may be relevant.
The ECM interprets position of transaxle switch, cruise control switches and vehicle speed. In response to these inputs, ECM signals opening and closing of servo vent and vacuum solenoid valves. ECM is located behind right side of instrument panel, near glove box.