CTS RWD V6-3.6L (2008)
4. Use the tabs (3) in order to disengage the retainers (2) on the ECM bracket from the ECM (1) and remove the ECM.
5. If replacing the ECM bracket perform the following steps, otherwise proceed to step 4 in the installation procedure.
6. Using a small flat-bladed tool, depress the locking tabs (1) on the ECM bracket.