Is your 2007 Buick Rainier, Chevy Trailblazer, GMC Envoy, or other compatible GM vehicle suffering from perplexing issues like stalling, erratic shifting, poor fuel economy, or a persistent Check Engine Light? These are classic signs of a failing Engine Control Module (ECM), the central computer that manages your vehicle’s engine performance. Don’t let a faulty computer keep you off the road. This direct-fit replacement ECM, part number 12602010 (interchangeable with 19210067), is the reliable solution to restore your vehicle’s performance and drivability.
Unlike a generic part from a local store, this ECM is not just a piece of hardware. It’s a comprehensive solution. Before we ship it, our technicians will program the unit with the latest GM-certified software updates using the unique Vehicle Identification Number (VIN) you provide. This critical step ensures that the module communicates perfectly with your vehicle’s specific systems, including the engine, transmission, and anti-theft system. This VIN-specific programming eliminates compatibility guesswork and paves the way for a smoother installation process.
We recently had a 2007 Chevy Trailblazer come into the shop with a frustrating problem. The owner complained of intermittent stalling at stoplights and a random P0606 (Internal Control Module Processor Error) code that would come and go. We checked all the usual suspects—fuel pressure, ignition components, wiring harnesses—and everything seemed fine. The vehicle would run perfectly for days, then suddenly die. After hours of diagnostics, we connected a scope to the ECM’s power and ground circuits and finally saw it: a momentary internal voltage drop within the module itself, just before it would command the engine to shut down. We installed one of these VIN-programmed ECMs, performed the security relearn, and the Trailblazer has been running flawlessly ever since. It’s a reminder that sometimes the most elusive electrical gremlins live inside the vehicle’s brain.
Solving Your 2007 Rainier ECM Problems
A failing engine computer can manifest in numerous ways, often mimicking other component failures. If you’re experiencing any of the following, a faulty ECM could be the root cause. This programmed module is designed to correct these issues and get your vehicle operating as the factory intended.
Common Symptoms of a Failing Engine Computer
- ✔ Check Engine Light: The most common indicator, often with communication-related codes (U-codes) or internal processor fault codes (P06xx series).
- ✔ Engine Stalling or Misfiring: The engine may stall unexpectedly, run rough, or misfire as the ECM fails to properly control fuel and spark.
- ✔ No-Start Condition: The vehicle may crank but refuse to start because the ECM isn’t activating the fuel pump or ignition coils.
- ✔ Poor Fuel Economy: Incorrect fuel mixture calculations can lead to a sudden and significant drop in MPG.
- ✔ Erratic Transmission Shifting: The ECM works with the Transmission Control Module (TCM), and a fault can cause harsh shifts, delayed engagement, or getting stuck in one gear.
- ✔ Intermittent Electrical Issues: Seemingly unrelated problems with gauges or other electronic components can sometimes be traced back to a failing ECM.
Guaranteed Fitment for Your Vehicle
This module is a direct replacement for part number 12602010 / 19210067 and is confirmed to fit the following vehicles with the specified options. Please ensure your vehicle is on this list to guarantee compatibility:
- 2007 Buick Rainier: Electronic Control Module; (LH engine), 4.2L
- 2007-2008 Chevrolet Trailblazer: Electronic Control Module; (LH engine), 4.2L
- 2007 Chevrolet Colorado: Electronic Control Module; (RH firewall)
- 2007 GMC Canyon: Electronic Control Module; (RH firewall)
- 2007-2008 GMC Envoy: Electronic Control Module; 4.2L (LH engine)
- 2007 Hummer H3: Electronic Control Module; (RH firewall)
- 2007-2008 Isuzu Ascender: Electronic Control Module; (4.2L, LH engine)
- 2007 Isuzu i-290: Electronic Control Module; (RH firewall)
- 2007 Isuzu i-370: Electronic Control Module; (RH firewall)
- 2007-2008 Saab 9-7x: Electronic Control Module; (LH engine), 4.2L / 6 cylinder
Frequently Asked Questions
Is this part ready to install when it arrives?
Yes, this ECM comes pre-programmed to your vehicle’s specific VIN. In most cases, this allows for a straightforward installation. However, you will need to perform a security relearn procedure (also known as a CASE relearn) after installation so the module can sync with your vehicle’s anti-theft system and crankshaft position sensor. This procedure can be done by a qualified mechanic or a knowledgeable DIYer with the right scan tool.
Where do I provide my vehicle’s VIN?
After you complete your purchase, you will need to send us your 17-digit VIN. You can typically add it as a note during checkout or reply to your order confirmation email. We cannot program and ship the module without your VIN.
What is the difference between an ECM and a PCM?
The terms are often used interchangeably. ECM stands for Engine Control Module, while PCM stands for Powertrain Control Module. In most modern vehicles like your 2007 Rainier, the module controls both the engine and the transmission, making ‘PCM’ the more technically accurate term. However, ‘ECM’ is still widely used in the industry and service information.
How can I be sure my old ECM is the problem?
While the symptoms listed are strong indicators, it’s always best to have a proper diagnosis performed by a professional mechanic. They can rule out other potential causes like bad wiring, faulty sensors, or fuel delivery issues before you replace the module. Checking for specific diagnostic trouble codes related to internal module failure (like P0601-P0606) is a key step.
Is this an original GM part?
This is a genuine, original equipment part that has been thoroughly tested and loaded with the latest official GM software for your vehicle. It meets or exceeds all original factory specifications for performance and reliability.