Restore Peak Performance to Your GM Truck or SUV
Is your 2007-2008 GMC Envoy, Trailblazer, or other GM vehicle suffering from frustrating and hard-to-diagnose electrical gremlins? If you’re dealing with a persistent Check Engine Light, poor fuel economy, erratic shifting, or even a no-start condition, a failing Powertrain Control Module (PCM) is often the culprit. This unit, part number 19210067 (interchangeable with 12602010), is the direct, reliable solution to get your vehicle back on the road and running like it should.
As the ‘brain’ of your vehicle, the PCM controls everything from fuel mixture and ignition timing to transmission shift points. When it fails, it can cause a cascade of problems that can be maddening for both DIYers and professional technicians. We take the guesswork and hassle out of the repair by providing a high-quality replacement PCM that is professionally programmed to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This means no expensive trips to the dealership for programming—it arrives ready for installation.
A Real-World Scenario from My Shop
“A customer brought in a 2007 Trailblazer with the 4.2L engine. It had a random stall and the transmission would sometimes refuse to shift out of first gear. The previous shop had replaced two different sensors and checked wiring for hours with no luck. The only code stored was a P0606 (PCM Processor Fault). After confirming power and grounds to the module were solid, we knew it was an internal PCM failure. We installed one of these VIN-programmed units, performed the security relearn, and the truck was back to perfect running condition in under 30 minutes. The customer was thrilled to have a reliable vehicle again without wasting more money on diagnostics.”
Is Your Vehicle Showing Signs of PCM Failure?
A faulty 2007-2008 Envoy PCM can manifest in many ways. If you’re experiencing any of the following, this module is your likely solution:
- ✔ Persistent Check Engine Light (CEL) that won’t clear
- ✔ Unexplained drop in fuel mileage (MPG)
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Engine stalling, stumbling, or hesitating during acceleration
- ✔ Complete no-start or intermittent starting issues
- ✔ Failure to pass an emissions test
- ✔ Communication error codes (U-codes) with a scan tool
Plug-and-Play Installation: No Dealer Visit Required
One of the biggest benefits of this module is the pre-programming service. We handle the complex part so you can handle the installation. Here’s a general guide for replacement:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait 10-15 minutes for the system to discharge.
- Locate the PCM: On most GMT360 platform vehicles like the Envoy, Trailblazer, and Rainier, the PCM is located on the driver’s side of the engine block. On trucks like the Colorado, Canyon, and H3, it’s often on the passenger-side firewall.
- Disconnect Connectors: Carefully release the locking tabs on the electrical harness connectors and pull them straight out from the module. Inspect the pins for any corrosion or damage.
- Remove the Old Module: Unbolt the PCM from its mounting bracket. It’s typically held by a few small bolts.
- Install the New PCM: Mount your new, pre-programmed module in place and securely tighten the bolts.
- Reconnect Everything: Plug the harness connectors firmly back into the new PCM until they click. Reconnect your negative battery terminal.
- Perform Security Relearn: You will need to perform a simple security relearn procedure. This typically involves turning the key to the ‘ON’ position for 10-15 minutes, then ‘OFF’ for 10 seconds, and repeating two more times. This allows your vehicle’s anti-theft system to recognize the new PCM. Your vehicle should then start and run correctly.
Guaranteed Fitment for Your Vehicle
This 2007-2008 Envoy PCM is a direct-fit replacement for a wide range of GM vehicles. Please verify your model and engine options below. Providing your VIN at checkout is required to ensure we send you a perfectly matched and updated module.
Compatible Models:
- 2007-2008 GMC Envoy (4.2L Engine)
- 2007-2008 Chevrolet Trailblazer (4.2L Engine)
- 2007 Buick Rainier (4.2L Engine)
- 2007-2008 Saab 9-7X (4.2L / 6-Cylinder Engine)
- 2007-2008 Isuzu Ascender (4.2L Engine)
- 2007 Chevrolet Colorado
- 2007 GMC Canyon
- 2007 Hummer H3
- 2007 Isuzu I-290 / I-370
Note: For 2008 models, please ensure your original module has ID 19210067.
Frequently Asked Questions (FAQ)
- How do I know for sure that my PCM is the problem?
- While the symptoms above are strong indicators, the best way is through proper diagnostics. A professional mechanic can check for specific PCM-related trouble codes (like P0600-P0606) and verify that power, ground, and data lines to the module are intact before condemning the PCM.
- What is VIN programming and why is it essential?
- VIN programming loads your vehicle’s specific software, including engine parameters, transmission strategy, and security information, onto the PCM. Without it, the vehicle will not start or run correctly. We perform this service for you so the part is ready to install out of the box.
- Will I need any special tools for installation?
- No special tools are required. Basic hand tools like a socket set will be sufficient for removing the old module and installing the new one. The security relearn procedure is done with just the ignition key.
- Where is the PCM located on my 2007 Envoy?
- On the 2007 GMC Envoy with the 4.2L engine, the PCM is typically mounted to the driver’s side of the engine block, below the intake manifold. It will have several large electrical connectors attached to it.
- What’s the difference between a PCM and an ECM?
- The terms are often used interchangeably. PCM (Powertrain Control Module) is more common as it typically controls both the engine and transmission, while ECM (Engine Control Module) technically just controls the engine. For this vehicle, it’s a PCM.