Remember, use a new, never used. The new unit must be flashed after installation from the dealer. It may or may not run so be prepared to have it towed. The failure cause needs to be determined or the new one will fail as well.
Engine Control Module (ECM) Removal And Installation
Engine Control Module (ECM) Removal
Remove the battery.
Remove the ECM bracket nuts.
Disconnect the ECM connector.
Remove the ECM retaining nuts and the ECM.
Engine Control Module (ECM) Installation
Installation should follow the removal procedure in the reverse order.
Install the ECM.
Tighten: Tighten the ECM retaining nuts to 10 14 N.M (89 124 lb. In).
Tighten the ECM bracket nuts.
Tighten: Tighten the ECM bracket nuts to 10 14 N.M (89 124 lb. In).