Installation Procedure

If the ECM/TCM bracket (1) was previously removed, install the ECM/TCM bracket (1) to the vehicle frame.

Fig 1: Identifying ECM/TCM Bracket & Retaining Bolts
Courtesy of GENERAL MOTORS CORP.
Install the ECM/TCM bracket retaining bolts (2).
NOTE: Refer to Fastener Notice .
Tighten the ECM/TCM bracket bolts.
Tighten: Tighten the bolts to 10 N.m (89 lb in).
Install the TCM. Refer to Transmission Control Module Replacement .
Insert the ECM into the retaining slots of the ECM/TCM bracket.

Fig 2: Identifying ECM/TCM Bracket Upper Retainers
Courtesy of GENERAL MOTORS CORP.
Secure the ECM to the bracket ensuring that the ECM retaining tabs (1) are fully engaged.
Connect the engine wiring harness electrical connectors to the ECM.

Fig 3: View Of ECM
Courtesy of GENERAL MOTORS CORP.
Install the ECM/TCM cover.

Fig 4: View Of ECM/TCM & Cover
Courtesy of GENERAL MOTORS CORP.
Ensure the ECM/TCM cover retainers (1) are fully engaged to the ECM/TCM bracket.
Connect the cooling fan electrical connector.
Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
If the ECM was replaced the replacement ECM must be programmed. Refer to Control Module References .