Is Your Trailblazer or Envoy Running Rough?
Dealing with a persistent check engine light, erratic shifting, or a frustrating no-start condition can make you lose faith in your truck. When the brain of your engine—the Powertrain Control Module (PCM)—starts to fail, it can cause a host of confusing and stressful problems. This isn’t just an inconvenience; it’s a matter of reliability. You need a solution that works right out of the box. This is it. This direct-fit Powertrain Control Module is the definitive fix, arriving at your door fully programmed to your vehicle’s specific VIN with the latest GM software updates. This is the key to restoring the performance and dependability you count on from your vehicle.
Common Symptoms & Your Direct-Fit Solution
If you’re experiencing any of the issues below, a failing computer is the likely culprit. This professionally programmed module is designed to be the final solution for these problems. By ordering our 2006 Trailblazer EXT PCM 12589311, you’re not just buying a part; you’re buying a permanent fix that gets you back on the road without the hassle of a dealership visit.
- Check Engine Light (CEL) for internal module failure (DTC P0601, P0606)
- Intermittent stalling or engine shutting off while driving
- Harsh or unpredictable automatic transmission shifting
- Complete no-start condition with no spark or fuel injector pulse
- Loss of communication with the PCM on a scan tool
- Poor fuel economy and reduced engine power
Features & Tangible Benefits
- ✔ VIN-Specific Programming: We flash this module with your truck’s exact VIN and the latest GM software, ensuring it works seamlessly with your existing systems right out of the box.
- ✔ Plug & Play Installation: Simply disconnect the battery, swap the old module with this one, and reconnect the battery. No expensive dealer programming is required.
- ✔ Resolves Common Failures: Engineered to correct the root causes of common GM PCM issues, from internal processor faults to communication errors.
- ✔ Broad Compatibility: This single unit is a direct replacement for a wide range of original part numbers, making it the correct choice for your Trailblazer, Envoy, Rainier, H3, Colorado, and more.
- ✔ Restored Performance: By installing a module with updated software, you can often solve issues you didn’t even know were computer-related, like poor idle quality and throttle response.
- ✔ This unit is backed by our one-year replacement warranty.
An Expert’s Note on GM Security Systems: Many owners of these GM trucks and SUVs run into a frustrating roadblock after swapping a computer: the PassLock or PassKey anti-theft system. An incorrectly programmed or non-programmed module will not recognize your keys, leaving your vehicle immobilized. We eliminate this problem entirely. By programming the module to your VIN before shipping, we ensure the security handshake between the key, body control module, and this PCM happens correctly on the first try, saving you from a costly tow to the dealer.
Don’t let a faulty computer keep your reliable truck sidelined. This is the most straightforward, effective way to solve complex electronic issues and restore your vehicle’s performance. Getting the correct, pre-programmed 2006 Trailblazer EXT PCM 12589311 is the first step to driving with confidence again.
Frequently Asked Questions
Do I need to do anything after installation?
This module is designed for a plug-and-play installation. In most cases, no further action is needed. However, for peak performance and to clear certain transmission codes, a Crankshaft Variation Relearn (also known as a CASE relearn) may be beneficial. This is a simple procedure that any professional scan tool can perform.
How do I provide my Vehicle Identification Number (VIN)?
After you complete your purchase, you can add your 17-digit VIN to the ‘notes’ section of your order. If you forget, we will send you an email reminder to ensure we can program your module accurately before shipping.
Is this the correct part for my vehicle?
This module fits a wide range of GM models listed above. Please check the compatibility list and compare your original part number to the numbers provided in the description. For 100% certainty, feel free to contact us with your VIN, and we will verify the fitment for you.
What if my original part number isn’t on the list?
The part numbers listed are the most common, but there can be others. The best way to ensure compatibility is to send us a message with your vehicle’s VIN and the part number from your original computer. We will confirm the correct replacement for you.
What exactly does ‘VIN programmed’ mean?
It means we take a fully tested and functional module and use specialized equipment to load it with your vehicle’s unique VIN and the most current, stable software version available from General Motors. This makes the computer a perfect digital match for your truck, ensuring all systems communicate and operate as the factory intended.