Restore Peak Performance to Your Vehicle with a Programmed ECM
Is your 2009 GMC Envoy or other compatible GM vehicle suffering from perplexing issues like poor fuel economy, erratic idling, a persistent Check Engine Light, or even a no-start condition? These are common indicators of a failing Engine Control Module (ECM), the central computer responsible for managing your engine’s performance. A faulty ECM can disrupt everything from fuel injection and ignition timing to transmission shifting, leaving you with an unreliable and inefficient vehicle. This replacement Engine Control Module, part number 12630464, is the definitive solution to restore your vehicle’s factory performance and reliability.
Unlike generic modules that require expensive dealership programming, this unit arrives at your door fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). We install the latest GM-certified software updates before shipping, ensuring optimal compatibility and performance right out of the box. This plug-and-play solution eliminates the need for costly towing or specialized tools, allowing for a straightforward installation that gets you back on the road quickly and confidently.
Common Symptoms of a Failing Engine Control Module
- ✔ Persistent and unexplained Check Engine Light (CEL) illumination.
- ✔ Engine stalling, stumbling, or misfiring unexpectedly.
- ✔ A noticeable decrease in fuel efficiency.
- ✔ Difficulty starting the engine or a complete no-start condition.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Communication errors with diagnostic scan tools.
- ✔ Failure to pass state emissions testing.
From the Diagnostic Bay
We once had a 2009 Trailblazer with the 6.0L V8 come in on a tow truck. The owner had replaced the spark plugs, ignition coils, and even the fuel pump trying to solve a persistent misfire and stalling issue. His scanner kept showing random misfire codes (P0300). After confirming fuel pressure and spark were good, we checked the injector pulse with a noid light and found it was erratic on several cylinders. The wiring harness checked out perfectly. The culprit? The original ECM was failing internally, causing the injector drivers to malfunction intermittently. Installing a VIN-programmed 2009 Envoy Engine Control Module (which is compatible) solved the problem instantly. The truck ran smoothly, and the customer was relieved to finally have a reliable vehicle again after chasing the wrong parts.
Why Choose a VIN-Programmed Module?
Modern vehicles are complex systems where multiple computers communicate with each other. The ECM is the master controller. When you install a new ECM, it must be programmed with the correct software and vehicle-specific parameters (like tire size, gear ratios, and security information) to function. Our professional programming service handles this critical step for you. By providing your VIN at checkout, you guarantee that the module you receive is a perfect match for your vehicle’s factory configuration. This ensures all systems operate as the manufacturer intended, without any compatibility conflicts.
Guaranteed Fitment for Your GM Vehicle
This module is a direct replacement for service number 12630464 and is also interchangeable with a wide range of other part numbers, including 12636659, 12639300, 1263605, 12628993, 12628911, 12625453, 12622175, and 12678512. It is confirmed to fit the following vehicles:
- Buick Lucerne: 2009-2011 (4.6L)
- Cadillac CTS: 2009 (6.2L)
- Cadillac DTS: 2009-2011
- Cadillac SRX: 2009 (4.6L)
- Cadillac STS: 2009 (4.4L, 4.6L), 2010 (4.6L)
- Cadillac XLR: 2009
- Chevrolet Colorado: 2009-2012 (2.9L, 3.7L)
- Chevrolet Corvette: 2009 (ZR1)
- Chevrolet Trailblazer: 2009 (6.0L)
- GMC Canyon: 2009-2012 (2.9L, 3.7L)
- GMC Envoy: 2009 (5.3L)
- Hummer H3: 2009-2010 (3.7L)
- Saab 9-7x: 2009
Please provide your VIN upon purchase to ensure we program the correct software for your specific model and options.
Frequently Asked Questions
Do I need to do any programming after I receive this ECM?
No. We program the module with the latest GM software using the VIN you provide. In most cases, it is a direct installation. Some vehicles may require a simple security relearn procedure, which can be done without special tools and typically takes 10-30 minutes. Instructions are readily available online for this process.
Where do I provide my VIN?
You can enter your vehicle’s 17-digit VIN in the notes section during checkout. If you forget, we will contact you via email to request it before we can program and ship your order.
Is this a brand new part?
This is a high-quality, genuine GM replacement part that has been thoroughly inspected, tested, and prepared to meet or exceed original factory specifications. It is loaded with fresh, vehicle-specific software to ensure reliable performance.
How can I be sure the ECM is the problem with my vehicle?
While the symptoms listed are strong indicators, it’s always best to have a professional diagnosis. A technician can verify that the ECM has proper power and ground connections and that other components like sensors and wiring are not the root cause of the issue before you order a replacement.
What is your warranty policy?
This part comes with a standard warranty that covers defects in the module and programming. Please refer to our website’s warranty page for complete details and duration.