Restore Your Vehicle’s Core Performance and Reliability
Is your Pontiac G6 or other GM vehicle plagued by a persistent Check Engine Light, unpredictable stalling, or a frustrating no-start condition? These aren’t just annoyances; they’re classic signs of a failing Engine Control Module (ECM), the central computer that governs your engine’s performance. When the ECM’s internal circuits degrade, it can lead to a cascade of problems, from poor fuel economy to erratic shifting. This isn’t a part you can afford to ignore. This replacement ECM is your direct, reliable solution to restore your vehicle’s health and your peace of mind.
We take the guesswork and dealership expense out of the equation. Unlike a salvage yard part with an unknown history, this module is meticulously prepared for your exact vehicle. Simply provide your Vehicle Identification Number (VIN) during checkout, and our technicians will flash the unit with the latest, most stable GM-approved software. This critical step ensures all factory-issued drivability and emissions improvements are loaded, making this a superior solution to the original module that came in your car. It arrives at your door ready for a straightforward installation, getting you back on the road quickly and confidently.
From the Diagnostic Bay: A Common G6 Scenario
Just last week, a 2008 Pontiac G6 3.6L was towed to my shop. The owner was frustrated—the car would crank but not start, and when it did, it ran terribly and threw a handful of random communication codes (U-codes) along with a P0606 for internal processor failure. He had already replaced the battery and checked fuses. After confirming power and ground to the ECM were solid, it was clear the module itself was the culprit. These internal failures are common; heat cycles and vibrations eventually take their toll on the circuit board. We installed one of our VIN-programmed modules, performed the quick security relearn, and the car fired up instantly and ran perfectly. This is the definitive fix for that exact problem.
Key Symptoms of a Failing Engine Computer
- ✔ Stubborn Check Engine Light with codes like P0601, P0606, or other internal processor faults.
- ✔ Unexplained engine stalling, hesitation, or rough idling.
- ✔ Complete no-start or intermittent hard-starting conditions.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Communication loss codes (U-codes) indicating the ECM is not talking to other modules.
- ✔ Erratic automatic transmission shifting behavior.
- ✔ Apparent failure of multiple unrelated sensors at the same time.
A Straightforward Guide to Installation
For the 2006-2009 Pontiac G6, the ECM is located in the left (driver’s side) front of the engine compartment. While professional installation is always an option, a confident DIYer can complete this job.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait 10-15 minutes for the system capacitors to discharge.
- Locate and Access: Identify the ECM in the engine bay. You may need to remove a plastic cover or bracket for clear access.
- Disconnect: Carefully unlatch and remove the electrical connectors from the old module. Inspect the pins for any corrosion or damage.
- Swap the Module: Unbolt the old ECM from its mounting bracket and set it aside. Secure the new, programmed module in its place.
- Reconnect: Firmly plug the electrical connectors into the new ECM until they click into place. Re-attach the negative battery terminal.
- Security Relearn: You may need to perform a simple security relearn procedure. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’, and repeating two more times before starting the engine. Consult your owner’s manual for the specific procedure for your vehicle.
Guaranteed Vehicle Fitment
This ECM, part number 12630457, is a direct replacement for a wide range of General Motors vehicles. It is interchangeable with service numbers 12590032, 12602044, 12603530, 12605843, 12607096, and 19210737. Please verify your vehicle, year, and engine in the comprehensive list below to ensure a perfect match.
COLORADO 08 Electronic Control Module; (RH firewall)
ENVOY 07-08 Electronic Control Module; 5.3L (LH engine)
ENVOY 08 Electronic Control Module; 4.2L (LH engine), ID 12607096
G6 09 Electronic Control Module; (LH front engine compartment), 3.6L, ID 19210737
MONTE CARLO 06 Electronic Control Module; (lower part of air cleaner box), 3.5L
XLR 09 Electronic Control Module; (RH front engine compartment), ID 12607096
AURA 08-09 Electronic Control Module; (RH firewall), 2.4L, w/hybrid
DTS 06 Electronic Control Module
DEVILLE 05 Electronic Control Module; (LH engine compartment), ID 12590032
G6 07 Electronic Control Module; (LH front engine compartment), 3.6L, ID 12605843
IMPALA 06 Electronic Control Module; (lower part of air cleaner box), 3.5L
LACROSSE 08-09 Electronic Control Module; (lower air cleaner housing), 5.3L
STS 06 Electronic Control Module; (LH frame rail), 4.4L
TRAILBLAZER 08 Electronic Control Module; (LH engine), ID 12636660
UPLANDER 09 Electronic Control Module; (LH engine compartment), (3.9L)
ISUZU ASCENDER 08 Electronic Control Module; (4.2L, LH engine), ID 19210737
SAAB 9-7X 07 Electronic Control Module; (LH engine), 8 cylinder
TRAILBLAZER 07 Electronic Control Module; (LH engine), 5.3L
ENCLAVE 08 Electronic Control Module; (behind fan shroud), ID 19210737
LUCERNE 08 Electronic Control Module; (lower part of air cleaner box), 4.6L, ID 12607096
MONTE CARLO 06 Electronic Control Module; (lower part of air cleaner box), 3.9L
RAINIER 07 Electronic Control Module; (LH engine), 5.3L
ISUZU ASCENDER 08 Electronic Control Module; (4.2L, LH engine), ID 12607096
CTS 06 Electronic Control Module; (RH engine compartment), V-Series, ID 12603530
STS 08 Electronic Control Module; (LH frame rail), 4.6L
G6 06 Electronic Control Module; (LH front engine compartment), ID 12603530
G6 08 Electronic Control Module; (LH front engine compartment), 3.6L
ION 06 Electronic Control Module; 2.4L (opt LE5)
MALIBU 06 Electronic Control Module; 3.9L
MALIBU 08 Electronic Control Module; new style (emblem in bumper cover), 2.4L, w/hybrid
RELAY 06 Electronic Control Module; (LH engine compartment), 3.9L
VUE 08-09 Electronic Control Module; 2.4L, VIN Z (8th digit, opt LAT)
OUTLOOK 08 Electronic Control Module; (behind fan shroud)
SOLSTICE 06 Electronic Control Module; (LH front frame rail)
VUE 08 Electronic Control Module; 3.6L
VUE 09 Electronic Control Module; 3.6L, VIN 7 (8th digit, opt LY7)
ACADIA 07-08 Electronic Control Module; (behind fan shroud), ID 12607096 (ECM)
AURA 08-09 Electronic Control Module; (RH firewall), 3.6L
ENVOY 08 Electronic Control Module; 4.2L (LH engine), ID 19210737
G6 07 Electronic Control Module; (LH front engine compartment), 3.6L, ID 12603530
GRAND PRIX 08 Electronic Control Module; (lower air cleaner box), 5.3L
HHR 06 Electronic Control Module; (LH rear engine compartment), 2.4L
STS 08 Electronic Control Module; (LH frame rail), 4.4L
G6 07 Electronic Control Module; (LH front engine compartment), 3.6L, ID 12590032
ISUZU I-290 08 Electronic Control Module; (RH firewall)
LUCERNE 06 Electronic Control Module; (lower part of air cleaner box), 4.6L
MALIBU 09-10 Electronic Control Module; 2.4L, w/hybrid
UPLANDER 08 Electronic Control Module; (LH engine compartment), (3.9L), ID 19210737
IMPALA 06 Electronic Control Module; (lower part of air cleaner box), 3.9L
MONTANA 06 Electronic Control Module; (LH engine compartment), (SV6), 3.9L
TRAILBLAZER 08 Electronic Control Module; (LH engine), ID 19210737
ENVOY 08 Electronic Control Module; 4.2L (LH engine), ID 12636660
G6 07 Electronic Control Module; (LH front engine compartment), 3.6L, ID 12602044
TRAILBLAZER 08 Electronic Control Module; (LH engine), ID 12607096
TRAILBLAZER 09 Electronic Control Module; (LH engine), 4.2L
CANYON 08 Electronic Control Module; (RH firewall)
COBALT 06 Electronic Control Module; (LH front engine compartment), 2.4L (VIN B, 8th digit, 4-146)
ISUZU I-370 08 Electronic Control Module; (RH firewall)
MALIBU 09 Electronic Control Module; 3.6L
SRX 08 Electronic Control Module; (LH engine compartment), (4.6L)
SAAB 9-7X 08 Electronic Control Module; (LH engine), 5.3L
ENCLAVE 08 Electronic Control Module; (behind fan shroud), ID 12607096
G6 09 Electronic Control Module; (LH front engine compartment), 3.6L, ID 12607096
IMPALA 08-09 Electronic Control Module; (lower part of air cleaner box), 5.3L
XLR 06 Electronic Control Module; (RH front engine compartment), 4.4L
XLR 08 Electronic Control Module; (RH front engine compartment)
ENVOY 09 Electronic Control Module; (LH engine), 4.2L
G6 07 Electronic Control Module; (LH front engine compartment), 3.6L, ID 12607096
G6 07 Electronic Control Module; (LH front engine compartment), 3.6L, ID 12618163
LUCERNE 08 Electronic Control Module; (lower part of air cleaner box), 4.6L, ID 19210737
MONTANA 08-09 Electronic Control Module; (LH engine compartment)
PURSUIT 06 Electronic Control Module; (LH front engine compartment), 2.4L
VUE 10 Electronic Control Module; 3.6L
ACADIA 08 Electronic Control Module; (behind fan shroud), ID 19210737 (PCM)
DTS 08 Electronic Control Module
TERRAZA 06 Electronic Control Module; (LH engine compartment), 3.9L
TRAILBLAZER 07 Electronic Control Module; (LH engine), 6.0L
SAAB 9-7X 08 Electronic Control Module; (LH engine), 6.0L
HUMMER H3 08 Electronic Control Module; (RH firewall)
MALIBU 08 Electronic Control Module; new style (emblem in bumper cover), 3.6L
UPLANDER 08 Electronic Control Module; (LH engine compartment), (3.9L), ID 12607096
UPLANDER 06 Electronic Control Module; (LH engine compartment), 3.9L
Frequently Asked Questions
Do I need to program this module?
No. We handle the programming for you before shipment. Just provide your vehicle’s 17-digit VIN when you place your order, and it will arrive ready to install with the latest GM software.
What is a VIN and where do I find it?
The VIN (Vehicle Identification Number) is your car’s unique 17-digit serial number. You can typically find it on a small plate on the driver’s side of the dashboard (viewable through the windshield) or on a sticker in the driver’s side door jamb.
Will I need to do anything else after installing it?
In many cases, you may need to perform a simple vehicle anti-theft system (VATS) relearn. This procedure does not require special tools and can usually be done by cycling the ignition key. We recommend checking your owner’s manual for the specific steps for your model.
How can I be sure my old ECM is the problem?
The symptoms listed above are strong indicators. The most definitive signs are specific diagnostic trouble codes like P0601-P0606 or a complete lack of communication with a professional scan tool. If you are uncertain, we always recommend having a qualified mechanic perform a full diagnostic check.
What makes this better than a used one from a junkyard?
A used module from a salvage yard has an unknown history, may have the same fault as your old one, and will still require expensive programming. Our module is verified, programmed with the latest software to fix original bugs, and is ready for installation, saving you time, money, and uncertainty.