Engine Control Module (ECM)
WARNING: This page is about a different car, the 1989 Cadillac Allante. However, it is still accessible from the selected car via links, so may be relevant.
For installation and removal of the ECM, see 1989 REMOVAL, OVERHAUL & INSTALLATION -- ALLANTE article.
For diagnostic and testing procedures, see PFI CHART C-1: ECM REPLACEMENT CHECK CHART C-1 (ECM REPLACEMENT CHECK) in 1989 SELF-DIAGNOSTICS -- ALLANTE article.