Is Your Truck or SUV Running Rough? Get Back on the Road with Confidence.
There’s nothing more frustrating than a vehicle you can’t rely on. If your GMC Envoy, Chevy Trailblazer, or Hummer H3 is suddenly stalling, shifting erratically, or refusing to start, the problem often points directly to a failing Powertrain Control Module (PCM). This isn’t just an inconvenience; it’s a critical failure that compromises your vehicle’s performance, fuel economy, and safety. This pre-programmed engine computer is the definitive, hassle-free solution to get your vehicle running like new again.
Common Symptoms & Your Solution
A failing PCM can cause a cascade of confusing issues. You might be experiencing one or more of the following:
- A persistent Check Engine Light (CEL) that won’t go away.
- Diagnostic Trouble Codes (DTCs) like P0601, P0606, or other communication errors.
- Unexplained stalling or a complete no-start condition.
- Poor acceleration and a noticeable drop in fuel mileage.
- Harsh or unpredictable automatic transmission shifting.
- Failure to pass an emissions test.
Instead of guessing with used parts from a salvage yard that won’t work without expensive dealer programming, this module is your direct-fit answer. We take your vehicle’s VIN and flash this unit with the latest, most stable GM software updates. This ensures that when you receive your 2006 Envoy PCM 12597776, it’s ready for a simple, plug-and-play installation.
Features & Tangible Benefits
- ✔ VIN-Specific Programming: We flash the module to your exact vehicle VIN, ensuring it communicates perfectly with your truck’s systems right out of the box. No dealer visit required.
- ✔ Latest GM Software Updates: Your PCM arrives with the newest factory software, which often corrects original bugs and improves transmission shifting, idle stability, and overall efficiency.
- ✔ Plug-and-Play Installation: Simply disconnect the battery, swap the old module with this one, and reconnect the battery. It’s designed for a straightforward installation for the DIY mechanic or professional technician.
- ✔ Comprehensive Solution: This single unit is the brain of your engine and transmission, correcting a wide range of performance and drivability problems at their source.
- ✔ Cost-Effective Repair: Avoid the high costs and scheduling headaches of a dealership service department. This is a smart, reliable repair that gets you back on the road for less.
- ✔ This unit is backed by our one-year replacement warranty.
Expert Insight: Why VIN Programming is Non-Negotiable
Many people try to save a few dollars by pulling a computer from a junkyard. This almost never works. GM vehicles from this era use a sophisticated anti-theft system (Passlock/VATS) that marries the PCM to the original vehicle’s BCM and ignition key. Installing a used, un-programmed module will result in a no-start condition every time. Our professional programming service not only matches the 2006 Envoy PCM 12597776 to your engine and transmission but also ensures it syncs with your anti-theft system, making the installation process smooth and successful.
Frequently Asked Questions
Do I need to do any programming after I install it?
No. This module arrives fully programmed to your VIN and is ready to be installed. In some cases, a Crankshaft Variation Relearn (also known as a CASE relearn) may be needed to clear a P1336 code, which can be done with a capable scan tool.
How do I provide you with my vehicle’s VIN?
After you complete your purchase, you can reply to your order confirmation email with the 17-digit VIN. You can also add it as a note during the checkout process. We cannot ship your part until we receive the VIN.
Is this the correct part for my vehicle?
This module fits a wide range of 2004-2006 GM trucks and SUVs. Please review the detailed fitment list on this page and cross-reference your original part number with the numbers listed. If you’re still unsure, send us a message with your VIN, and we will verify compatibility for you.
What symptoms does a bad PCM cause?
A failing PCM can cause a variety of issues, including a persistent check engine light, stalling, rough idling, poor fuel economy, hard starting, and erratic transmission shifting. Our 2006 Envoy PCM 12597776 is designed to solve these core issues.
What is the warranty on this part?
This unit is backed by our one-year replacement warranty. This provides peace of mind that you are receiving a quality, reliable component for your vehicle.
Will this fix my emissions test failure?
In many cases, yes. If your emissions failure is due to PCM-related trouble codes or poor engine management, installing this correctly programmed module should resolve the issue and allow the vehicle’s monitors to run correctly.