Restore Peak Performance to Your GM Truck or SUV
Is your 2007-2008 GMC Envoy, Chevy Trailblazer, or other compatible GM vehicle suffering from perplexing issues like stalling, erratic shifting, a persistent Check Engine Light, or a no-start condition? These are often hallmark signs of a failing Powertrain Control Module (PCM). The PCM is the central computer of your vehicle, orchestrating critical engine and transmission functions. When it falters, the entire vehicle’s performance and reliability are compromised. This replacement PCM, part number 19210067 (also compatible with 12602010), is the definitive solution to get your vehicle running correctly again.
From the Diagnostic Bay
We had a 2007 Chevy Trailblazer with the 4.2L engine come in on a flatbed. The customer said it would crank but never start, and he’d already replaced the crank sensor and fuel pump to no avail. The scanner was showing a slew of communication error codes with various modules. Instead of just throwing more parts at it, we checked the main power and ground feeds to the PCM. They were solid. We then connected a breakout box to test the 5-volt reference circuits coming out of the module. We found the 5V reference was shorted to ground internally within the PCM. This single failure was starving all the critical engine sensors of power, creating the no-start condition and the communication codes. A new, correctly programmed PCM had it firing up on the first try. It’s a perfect example of how a single module can cause a cascade of confusing symptoms.
Common Symptoms of a Failing PCM
- ✔ Persistent Check Engine Light (CEL) with communication-related trouble codes (e.g., U-codes).
- ✔ Engine stalling, stumbling, or misfiring for no apparent reason.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Complete no-start condition where the engine cranks but won’t fire up.
- ✔ Reduced fuel economy and poor overall engine performance.
- ✔ Intermittent failure of electronic components like fuel injectors or ignition coils.
- ✔ Inability to pass an emissions test.
The Importance of a VIN-Programmed 2007-2008 Envoy PCM
Replacing a modern vehicle’s PCM isn’t as simple as swapping a battery. Each module is programmed with software specific to your vehicle’s Vehicle Identification Number (VIN). This programming dictates everything from fuel mixture and ignition timing to transmission shift points and anti-theft system operation. Installing a non-programmed module will result in a vehicle that won’t start or run properly. We eliminate this complexity. By providing us with your VIN during checkout, you receive a 2007-2008 Envoy PCM that is flashed with the latest GM-certified software for your exact vehicle configuration. This ensures a seamless installation process and restores the original factory performance and drivability.
Installation and Setup
Physically installing the module is straightforward. It is typically located in the engine bay (on the driver’s side for the Envoy/Trailblazer platform). After disconnecting the battery, you simply unplug the electrical connectors and unbolt the old module. Bolt the new one in, reconnect the harnesses, and reconnect the battery. However, after installation, you will likely need to perform a security relearn procedure (often called Passlock or Passkey relearn). This procedure syncs the new PCM with your vehicle’s existing anti-theft system and keys. The procedure is simple and can typically be done in your driveway with no special tools, often involving a sequence of turning the key on and off. Instructions for this procedure are widely available online for your specific model.
Don’t let a faulty computer keep your reliable GM truck or SUV off the road. This professionally programmed PCM is the most effective and reliable way to solve complex electronic issues and restore your vehicle’s function. Order today and provide your VIN to receive a part that’s ready for installation right out of the box.
Frequently Asked Questions
Do I need to send my old PCM back (core charge)?
This listing does not require a core return. You can keep your old part, which saves you the time, hassle, and expense of return shipping.
Is this part difficult to install myself?
The physical replacement is simple for anyone with basic mechanical skills. It involves disconnecting the battery, unplugging connectors, and removing a few bolts. The most critical step after installation is performing the security relearn procedure, which syncs the new PCM to your keys. This can usually be done without special tools.
What happens if I don’t provide my VIN?
We cannot ship your part without a VIN. The programming is essential for the part to function in your vehicle. The order will be held until you provide the VIN to ensure you receive a correctly configured module.
Will this fix my specific problem?
This PCM will correct issues directly caused by a faulty module. While the symptoms listed are common indicators of PCM failure, it’s crucial to have your vehicle properly diagnosed. Ensure that wiring, sensors, and other related components have been checked to confirm the PCM is the source of the problem.
Is this compatible with my 2007 Chevy Colorado?
Yes, this PCM is compatible with a wide range of GM vehicles from this era, including the 2007 Chevy Colorado and Canyon, Hummer H3, Isuzu Ascender, and more, as detailed in the fitment list. The VIN-specific programming ensures it works correctly for your model.