Restore Your Pontiac’s Performance and Reliability
Is your 2006-2009 Pontiac G6 suffering from frustrating, intermittent issues? Maybe it’s a check engine light that won’t go away, rough idling, stalling at stoplights, or a sudden drop in fuel economy. As a technician with over two decades of experience under the hood, I’ve seen these exact symptoms hundreds of times, and they often point directly to a failing Engine Control Module (ECM). The ECM is the brain of your vehicle, and when it starts to falter, it can cause a cascade of problems that are difficult to diagnose. Don’t let a faulty computer keep you off the road or drain your wallet with endless diagnostic fees.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take the guesswork and hassle out of the repair by pre-programming this module specifically for your vehicle using your VIN. This means it arrives with the latest, most stable software updates from GM, ensuring optimal performance and communication with your car’s other systems. You get a reliable fix that restores your vehicle’s original drivability and efficiency.
Case Study: A Tricky Diagnosis
A customer brought in their ’08 Pontiac G6 3.6L with a complaint that stumped two other shops: it would randomly refuse to start, but only after being driven for 30+ minutes. There were no consistent trouble codes, just a frustratingly intermittent problem. After checking the usual suspects (fuel pump, crank sensor), I focused on the ECM. On these models, heat soak can cause internal solder joints on the circuit board to fail, creating an open circuit only when the module gets hot. We swapped in one of our VIN-programmed ECMs, and the problem was solved instantly. The customer saved hundreds in further diagnostic time and got a permanent solution.
Is Your Vehicle Showing These Symptoms?
A failing ECM can manifest in many ways. If you’re experiencing any of the following, this module is the likely solution:
- ✔ Unexplained Check Engine Light (CEL) illumination
- ✔ Stored diagnostic trouble codes (DTCs) like P0601, P0606, or U0100
- ✔ Engine stalling, stumbling, or hesitating
- ✔ No-start or intermittent starting conditions
- ✔ Poor fuel mileage
- ✔ Failed emissions testing
- ✔ Erratic transmission shifting or performance issues
A Straightforward Guide to DIY Installation
Replacing the ECM on your G6 is a job most DIYers can handle in their own driveway. Our pre-programmed module makes it even simpler. Follow these general steps to get back on the road:
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the ECM: On the 2006-2009 Pontiac G6, the Engine Control Module is typically found in the LH (driver’s side) front of the engine compartment. It’s a silver metal box with large electrical connectors.
- Disconnect the Harnesses: Carefully release the locking tabs on the electrical connectors and pull them straight out from the module. Avoid pulling on the wires themselves.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket. Keep the hardware, as you may need it for the new installation.
- Install the New Module: Mount your new, pre-programmed ECM in place and securely tighten the bolts. Reconnect the electrical harnesses, ensuring they click firmly into place.
- Reconnect the Battery: Re-attach the negative battery terminal and tighten it securely.
- Perform Security Relearn: Most GM vehicles of this era require a simple security relearn procedure to sync the new ECM with your keys. This usually involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times. Your vehicle’s manual will have the specific procedure.
Verified Vehicle Compatibility
This module is a direct replacement for service numbers 12590032, 12602044, 12603530, 12605843, 12607096, 12630457, and 19210737, and fits a wide range of GM vehicles. Please verify your model and options below:
Pontiac:
G6 06-09 (Multiple Engines/IDs)
GRAND PRIX 08 5.3L
PURSUIT 06 2.4L
SOLSTICE 06
Chevrolet:
COBALT 06 2.4L
COLORADO 08
CANYON 08
IMPALA 06-09 (Multiple Engines)
MALIBU 06-10 (Multiple Engines/Styles)
MONTE CARLO 06 (3.5L, 3.9L)
HHR 06 2.4L
UPLANDER 06-09 3.9L
TRAILBLAZER 07-09 (Multiple Engines/IDs)
Buick:
ALLURE 08-09 5.3L
LACROSSE 08-09 5.3L
LUCERNE 06-08 4.6L (Multiple IDs)
RAINIER 07 5.3L
ENCLAVE 08 (Multiple IDs)
Cadillac:
CTS 06 V-Series
DTS 06, 08
DEVILLE 05
SRX 08 4.6L
STS 06-08 (4.4L, 4.6L)
XLR 06-09 (Multiple IDs)
GMC:
ACADIA 07-08 (Multiple IDs)
ENVOY 07-09 (Multiple Engines/IDs)
Saturn:
AURA 08-09 (2.4L Hybrid, 3.6L)
ION 06 2.4L
OUTLOOK 08
RELAY 06 3.9L
VUE 08-10 (Multiple Engines)
Hummer:
H3 08
Isuzu:
ASCENDER 08 4.2L (Multiple IDs)
I-290 08
I-370 08
Saab:
9-7X 07-08 (V8 Engines)
And other models, check the detailed list or contact us with your VIN.
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) is essential. It allows us to access the correct GM software for your car’s specific options, engine, and transmission. This ensures the module works perfectly right out of the box, with no additional programming required on your end.
Is this a plug-and-play part?
Almost! Because it comes pre-programmed to your VIN, the complex part is done. However, you will need to perform a simple vehicle security relearn procedure after installation. This takes about 30 minutes and requires no special tools, just your ignition key. We include instructions for this process.
Will this fix my specific problem?
This module corrects issues directly caused by a failing ECM, which includes a wide range of common engine performance and starting problems. While we can’t diagnose your vehicle remotely, the symptoms listed above are strong indicators of ECM failure. For a definitive diagnosis, it’s always best to have a professional mechanic check the vehicle.
Is this part compatible with other part numbers?
Yes. This ECM, part number 12630457, is a direct, interchangeable replacement for several other GM service numbers, including 12590032, 12602044, 12603530, 12605843, 12607096, and 19210737. If your original module has any of these numbers, this part will work for you.