Is Your Trailblazer, Envoy, or H3 Running Rough?
If you’re dealing with frustrating issues like a persistent check engine light, poor fuel economy, erratic shifting, or even a no-start condition, the problem may lie with a failing Powertrain Control Module (PCM). As the central computer of your vehicle, the PCM is responsible for managing the engine, transmission, and dozens of other critical systems. When it begins to fail, it can cause a cascade of problems that are often difficult to diagnose. This replacement PCM, part number 12602010 (interchangeable with 19210067), is the definitive solution to restore your vehicle’s performance and reliability.
From the Diagnostic Bay
We had a 2007 GMC Envoy with the 4.2L engine come into the shop that was giving the owner fits. The vehicle would randomly stall at stoplights and had a check engine light for an obscure sensor circuit fault that kept coming back no matter what parts were replaced. After hours of chasing wires, we finally hooked up a scope to the PCM outputs and saw the 5-volt reference signal dropping out intermittently. A faulty internal driver in the original PCM was the culprit. We installed one of these VIN-programmed units, performed the security relearn, and the Envoy ran perfectly. It’s a classic example of how a failing computer can mimic a dozen other problems.
Common Symptoms of a Failing PCM
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Vehicle failing to start or stalling intermittently.
- ✔ Noticeable decrease in fuel efficiency.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Engine misfires, stumbling, or rough idling.
- ✔ Communication errors with diagnostic scan tools.
- ✔ Failure to pass state emissions testing.
The Right Solution: A VIN-Programmed 2007-2008 Trailblazer PCM
Don’t settle for a generic, unprogrammed module from a salvage yard that will cause more headaches than it solves. This PCM is professionally programmed specifically for your vehicle using the latest GM software updates. By providing us with your Vehicle Identification Number (VIN) during checkout, we ensure that the module arrives with the correct calibration for your engine, transmission, and factory options. This crucial step guarantees compatibility and makes the installation process as seamless as possible, eliminating the need for an expensive trip to the dealership for programming.
This module is a direct-fit replacement for a wide range of GM trucks and SUVs built on the GMT360 and GMT370 platforms, including the Chevrolet Trailblazer, GMC Envoy, Buick Rainier, Saab 9-7x, Isuzu Ascender, and more. Please verify the part number and check the detailed fitment list below to confirm compatibility with your exact model.
Full Compatibility List:
- 2007-2008 Chevrolet Trailblazer (4.2L Engine)
- 2007-2008 GMC Envoy (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 confirm your original module has ID 19210067.
Frequently Asked Questions
Do I need to do any programming after I receive this PCM?
No. We program the module with your vehicle’s VIN before it ships, so it arrives ready for installation. However, you will need to perform a security relearn procedure (also known as a CASE relearn or Passlock relearn) after installation. This is a simple process that can typically be done without special tools and instructions can be easily found online for your specific vehicle.
Where do I provide my VIN?
You can add your 17-digit VIN to 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 plug-and-play part?
Yes, once the security relearn procedure is completed, it is a plug-and-play solution. The physical installation involves disconnecting the battery, unplugging the electrical connectors from your old PCM, removing it, and installing the new one in its place.
Will this fix my vehicle’s specific problem?
This PCM will resolve issues directly caused by a faulty engine computer. While the symptoms listed are common indicators of PCM failure, it’s essential to have your vehicle properly diagnosed by a qualified mechanic to rule out other potential causes, such as wiring or sensor issues.
What is the difference between part numbers 12602010 and 19210067?
These are interchangeable GM part numbers for the same hardware. 19210067 is often a service ID number found on the module’s sticker, while 12602010 is the base part number. Our module is a direct replacement for either number.