Engine Control Module (ECM)
WARNING: This page is about a different car, the 1988 Cadillac Allante and 1987 Cadillac Allante. However, it is still accessible from the selected car via links, so may be relevant.
For removal and installation of the ECM, see COMPUTERIZED ENGINE CONTROLS in REMOVAL & INSTALLATION article.
For diagnostic and testing ECM, see PFI CHART C-1: ECM REPLACEMENT CHECK in SELF-DIAGNOSTICS article.