Installation Procedure

WARNING: This page is about a different car, the 2008 Isuzu Ascender, 2008 GMC Envoy, and 2008 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

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

Fig 1: ECM/TCM Bracket Retaining Bolts

GM1521466

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).

Fig 2: View Of Engine Control Module (ECM) Bracket

GM1521468

Courtesy of GENERAL MOTORS CORP.

If the ECM was previously removed from the ECM/TCM bracket (2), install the ECM (3). Refer to Engine Control Module Replacement .

Fig 3: ECM/TCM Bracket

GM1521496

Courtesy of GENERAL MOTORS CORP.

Insert the TCM (1) into the retaining slot of the ECM/TCM bracket (2).

Fig 4: View Of ECM/TCM Retainer, Bracket & Retaining Tab

GM1521482

Courtesy of GENERAL MOTORS CORP.

Secure the TCM (2) to the ECM/TCM mounting bracket ensuring the TCM retaining tab (1) is fully engaged.

Fig 5: Identifying ECM/TCM Connectors & Bracket

GM1521481

Courtesy of GENERAL MOTORS CORP.

Connect the ECM electrical connector (1) to the TCM (2) if previously removed.

Fig 6: Identifying ECM/TCM cover, bracket & Retainers

GM1521469

Courtesy of GENERAL MOTORS CORP.

Install the ECM/TCM cover (2) to the ECM/TCM bracket (1).
Ensure the ECM/TCM cover retainers (2) are fully engaged with the ECM/TCM bracket (1).
Connect the cooling fan electrical connector.
Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
If the TCM was replaced the replacement TCM must be programmed. Refer to Control Module References .