Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSISUZU2006ASCENDER S, 5.3 M, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 223 (ENGINE CONTROL SYSTEM & FUEL SYSTEM - 5.3L - INTRODUCTION (2 OF 2))REPAIR INSTRUCTIONSENGINE CONTROL MODULE REPLACEMENTINSTALLATION PROCEDURE

2006 Isuzu Ascender S, 5.3 M, 4WD

Installation Procedure

2006 Isuzu Ascender S, 5.3 M, 4WDSECTION Installation Procedure

WARNING: This page is about a different car, the 2007 GMC Envoy, 2007 Chevrolet TrailBlazer, and 2007 Buick Rainier. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: ECM/TCM Bracket Retaining Bolts

Courtesy of GENERAL MOTORS CORP.

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

Fig 2: Identifying ECM/TCM Bracket Upper Retainers

Courtesy of GENERAL MOTORS CORP.

Insert the ECM into the retaining slots of the ECM/TCM bracket.
Secure the ECM to the bracket ensuring that the ECM retaining tabs (1) are fully engaged.

Fig 3: View Of ECM

Courtesy of GENERAL MOTORS CORP.

Connect the engine wiring harness electrical connectors to the ECM.

Fig 4: View Of ECM/TCM & Cover

Courtesy of GENERAL MOTORS CORP.

Install the ECM/TCM cover.
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 .

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.