Installation Procedure

Courtesy of GENERAL MOTORS COMPANY

Using a flat bladed tool, release the ECM bracket retainer. Slide the ECM and bracket assembly to the battery tray.
Engine Control Module (2) - Install

CAUTION:

Engine Control Module Bracket Nut (1) - Install and tighten [4x] 4.7N.m (42 lb in)
Courtesy of GENERAL MOTORS COMPANY

Engine Control Module Electrical Connector (1) - Connect
Connect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection
If replacing the engine control module, reprogram the module. Control Module References