Restore Your Cadillac’s Core Performance and Reliability
As a technician with over two decades of experience under the hood, I’ve seen firsthand the frustration that a failing Engine Control Module (ECM) can cause. Your 2008 Cadillac SRX is a sophisticated machine, and its ECM is the brain behind its performance, emissions, and drivability. When it starts to fail, you can be left chasing phantom sensor codes, dealing with a car that won’t start, or suffering from poor fuel economy. This isn’t just a part; it’s the central command for your vehicle’s engine, and getting it right is critical.
This isn’t a generic, one-size-fits-all computer. We take the guesswork and the expensive dealership trips out of the equation. By providing your vehicle’s VIN at checkout, you will receive a professionally programmed 2008 SRX Engine Module loaded with the latest GM factory software specific to your car. This ensures seamless integration, proper communication with other vehicle modules, and restored original performance, right out of the box.
A Technician’s Notebook: The Ghost in the Machine
I remember a 2008 SRX that came into my bay with a laundry list of complaints: intermittent stalling, a flickering check engine light, and a transmission that shifted harshly. The owner had already replaced two oxygen sensors and a mass airflow sensor at another shop with no success. My initial scan showed a dozen intermittent communication codes (U-codes) along with the sensor codes. This is a classic red flag. Instead of continuing to replace parts, we focused on the source. After verifying power and ground to the ECM were solid, we knew the module itself was the culprit. A new, correctly programmed ECM solved every single issue. This is why addressing the core problem with a quality part is always the most effective and economical repair.
Is Your Cadillac Showing These Symptoms?
A faulty ECM can manifest in numerous ways. If you’re experiencing any of the following, it’s a strong indicator that your engine’s computer may need replacement:
- ✔ Check Engine Light is on with codes pointing to internal module failure (e.g., P0601, P0606).
- ✔ Vehicle has a no-start or hard-start condition.
- ✔ Engine is stalling, stuttering, or running rough for no apparent reason.
- ✔ A noticeable drop in fuel efficiency.
- ✔ Communication errors with other modules (U-codes).
- ✔ Failure to pass state emissions testing.
Your Straightforward Installation Guide
Replacing the 2008 SRX Engine Module is a manageable job for a confident DIYer. The key is our pre-programming service, which eliminates the need for special scan tools for setup.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes to ensure all systems are powered down.
- Locate the ECM: On the 2008 Cadillac SRX with the 4.6L engine, the ECM is located in the engine compartment on the driver’s side (LH side).
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be released. Once disconnected, unbolt the module from its mounting bracket.
- Install the New Module: Mount your new, pre-programmed ECM in place and securely fasten it. Reconnect the electrical harnesses, making sure they click firmly into place.
- Final Steps: Reconnect the negative battery terminal. In some cases, a security or crank position sensor relearn procedure may be required, which can often be done without a scan tool or will learn automatically after a few drive cycles. Start the vehicle and check for proper operation.
Verified Vehicle Compatibility
This module, part number 12630457, is a direct replacement for a wide range of GM vehicles. It is interchangeable with service numbers 12590032, 12602044, 12603530, 12605843, 12607096, and 19210737. Please confirm your vehicle is on this list and match any specific options noted.
ACADIA 07-08 Electronic Control Module; (behind fan shroud), ID 12607096 (ECM)
ACADIA 08 Electronic Control Module; (behind fan shroud), ID 19210737 (PCM)
ALLURE 08-09 Electronic Control Module; (lower air cleaner housing), 5.3L
AURA 08-09 Electronic Control Module; (RH firewall), 2.4L, w/hybrid
AURA 08-09 Electronic Control Module; (RH firewall), 3.6L
CANYON 08 Electronic Control Module; (RH firewall)
COBALT 06 Electronic Control Module; (LH front engine compartment), 2.4L (VIN B, 8th digit, 4-146)
COLORADO 08 Electronic Control Module; (RH firewall)
CTS 06 Electronic Control Module; (RH engine compartment), V-Series, ID 12603530
DEVILLE 05 Electronic Control Module; (LH engine compartment), ID 12590032
DTS 06 Electronic Control Module
DTS 08 Electronic Control Module
ENCLAVE 08 Electronic Control Module; (behind fan shroud), ID 12607096
ENCLAVE 08 Electronic Control Module; (behind fan shroud), ID 19210737
ENVOY 07-08 Electronic Control Module; 5.3L (LH engine)
ENVOY 08 Electronic Control Module; 4.2L (LH engine), ID 12607096, 19210737, or 12636660
ENVOY 09 Electronic Control Module; (LH engine), 4.2L
G6 06 Electronic Control Module; (LH front engine compartment), ID 12603530
G6 07-09 Electronic Control Module; (LH front engine compartment), 3.6L
GRAND PRIX 08 Electronic Control Module; (lower air cleaner box), 5.3L
HHR 06 Electronic Control Module; (LH rear engine compartment), 2.4L
HUMMER H3 08 Electronic Control Module; (RH firewall)
IMPALA 06 Electronic Control Module; (lower part of air cleaner box), 3.5L or 3.9L
IMPALA 08-09 Electronic Control Module; (lower part of air cleaner box), 5.3L
ION 06 Electronic Control Module; 2.4L (opt LE5)
ISUZU ASCENDER 08 Electronic Control Module; (4.2L, LH engine), ID 19210737 or 12607096
ISUZU I-290 08 Electronic Control Module; (RH firewall)
ISUZU I-370 08 Electronic Control Module; (RH firewall)
LACROSSE 08-09 Electronic Control Module; (lower air cleaner housing), 5.3L
LUCERNE 06-08 Electronic Control Module; (lower part of air cleaner box), 4.6L
MALIBU 06 Electronic Control Module; 3.9L
MALIBU 08-10 Electronic Control Module; new style (emblem in bumper cover), 2.4L, w/hybrid
MALIBU 08-09 Electronic Control Module; new style (emblem in bumper cover), 3.6L
MONTE CARLO 06 Electronic Control Module; (lower part of air cleaner box), 3.5L or 3.9L
MONTANA 06-09 Electronic Control Module; (LH engine compartment)
OUTLOOK 08 Electronic Control Module; (behind fan shroud)
PURSUIT 06 Electronic Control Module; (LH front engine compartment), 2.4L
RAINIER 07 Electronic Control Module; (LH engine), 5.3L
RELAY 06 Electronic Control Module; (LH engine compartment), 3.9L
SAAB 9-7X 07-08 Electronic Control Module; (LH engine), 8 cylinder (5.3L, 6.0L)
SOLSTICE 06 Electronic Control Module; (LH front frame rail)
STS 06 Electronic Control Module; (LH frame rail), 4.4L
STS 08 Electronic Control Module; (LH frame rail), 4.4L or 4.6L
TERRAZA 06 Electronic Control Module; (LH engine compartment), 3.9L
TRAILBLAZER 07 Electronic Control Module; (LH engine), 5.3L or 6.0L
TRAILBLAZER 08-09 Electronic Control Module; (LH engine), 4.2L, 5.3L, or 6.0L
UPLANDER 06-09 Electronic Control Module; (LH engine compartment), (3.9L)
VUE 08-10 Electronic Control Module; 2.4L, 3.6L
XLR 06-09 Electronic Control Module; (RH front engine compartment)
Frequently Asked Questions
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to program the module with the exact software and calibrations for your specific vehicle. This ensures it works correctly with your engine, transmission, and options, preventing compatibility issues.
Is this a simple plug-and-play installation?
Yes, because we program it before shipping, it is designed to be a direct replacement. In most cases, you will not need to perform any additional programming. Some vehicles may require a simple security relearn procedure, which can be done without special tools.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the existing ECM, then yes, this part will resolve the issue. It’s crucial to have a proper diagnosis to confirm the ECM is the root cause before ordering.
Do I need to return my old ECM?
This listing does not require a core return. You can keep your old part, which saves you the time and hassle of shipping it back.