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 MANUALSCADILLAC2005SRX AWD V8-4.6L VIN AREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTRELAYS AND MODULES - POWERTRAIN MANAGEMENTRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSENGINE CONTROL MODULESERVICE AND REPAIR
2005 Cadillac SRX AWD V8-4.6L VIN A
Engine Control Module: Service and Repair
2005 Cadillac SRX AWD V8-4.6L VIN ASECTION Service and Repair
ENGINE CONTROL MODULE (ECM) REPLACEMENT
REMOVAL PROCEDURE
NOTE: Turn the ignition OFF when installing or removing the PCM connectors and disconnecting or reconnecting the power to the PCM (battery cable, PCM pigtail, PCM fuse, jumper cables, etc.) in order to prevent internal PCM damage.
1. Using a scan tool, retrieve the percentage of remaining engine oil and the remaining automatic transmission fluid life. Record the remaining engine oil and the remaining automatic transmission fluid life.
IMPORTANT:
- It is necessary to record the remaining engine oil life. If the replacement module is not programed with the remaining engine oil life, the engine oil life will default to 100 percent. If the replacement module is not programmed with the remaining engine oil life, the engine oil will need to be changed at 5 000 km (3,000 mi) from the last engine oil change.
- It is necessary to record the remaining automatic transmission fluid life. If the replacement module is not programed with the remaining automatic transmission fluid life, the automatic transmission fluid life will default to 100 percent. If the replacement module is not programmed with the remaining automatic transmission fluid life, the automatic transmission fluid will need to be changed at 83 000 km (50,000 mi) from the last automatic transmission fluid change.
2. Turn OFF the ignition.
3. Disconnect the battery negative cable.
4. Raise and support the vehicle. Refer to Vehicle Lifting.
5. Remove the front air deflector.
6. Disconnect the engine control module (ECM) electrical connectors (1).
7. Remove the ECM mounting nuts (2).
8. Remove the ECM from the vehicle.
INSTALLATION PROCEDURE
1. Install the ECM to the vehicle.
2. Install the ECM mounting nuts (2).
NOTE: Refer to Fastener Notice in Service Precautions.
Tighten the nuts to 8 N.m (71 lb in).
3. Connect the ECM electrical connectors (1).
4. Install the front air deflector.
5. Lower the vehicle.
6. Connect the battery negative cable.
7. Program the ECM. Refer to Engine Control Module Programming and Setup (4.6L) Engine Control Module Programming and Setup (3.6L - LY7) in Programming and Setup. Programming and Relearning
RENDER: 1.0x
NO RELATED
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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.