Is your 2004 GM truck or SUV running rough, refusing to start, or flashing a persistent Check Engine Light? A failing Powertrain Control Module (PCM) is often the culprit, disrupting everything from fuel delivery to transmission shifting. This isn’t just an inconvenience; it’s a critical failure that can leave you stranded. Get back behind the wheel with confidence with this fully programmed engine computer, designed to restore your vehicle’s original performance and reliability.
Common Symptoms & Your Solution
If you’re experiencing any of the issues below, a faulty PCM is the likely cause. This unit is the definitive solution for problems such as:
- Erratic or harsh transmission shifting
- Engine stalling, sputtering, or misfiring
- Complete no-start condition with power to all other systems
- Poor fuel economy and loss of power
- Check Engine Light with communication-related Diagnostic Trouble Codes (DTCs) like U0100
- Instrument cluster warning lights illuminating randomly
This replacement 2004 GMC Envoy XUV 12586242 PCM arrives programmed to your vehicle’s specific Vehicle Identification Number (VIN), ensuring it works seamlessly with your existing systems right out of the box.
Features & Benefits
- โ Plug & Play Installation: We program the module to your vehicle’s VIN before shipping. This eliminates the need for an expensive trip to the dealership for programming.
- โ Updated GM Software: Your PCM comes loaded with the latest factory software updates from General Motors, ensuring optimal engine performance, fuel efficiency, and transmission control.
- โ Guaranteed Compatibility: This unit is a direct replacement for service numbers 12586242, 19299226, 89017738 and many more, covering a wide range of 2004 GM trucks and SUVs.
- โ Restored Performance: By replacing the failing ‘brain’ of your engine, you’ll restore the crisp response, smooth idle, and dependable operation you rely on.
- โ Peace of Mind: This unit is backed by our one-year replacement warranty.
Expert Insight: The Critical Role of VIN Programming
Many people assume you can just swap a PCM from a junkyard vehicle. On these 2004 GM models, that’s a recipe for a no-start situation. The PCM is tied directly to the vehicle’s anti-theft system (VATS/Passlock). Without proper VIN programming, the module won’t recognize your keys and will prevent the engine from starting. Our pre-programming service handles this critical step, saving you time, money, and the immense frustration of a failed repair.
Don’t let a faulty computer sideline your trusted truck or SUV. Ordering the correct, professionally programmed 2004 GMC Envoy XUV 12586242 PCM is the most reliable and cost-effective way to solve complex electronic issues and get your vehicle running right again.
Frequently Asked Questions
Where do I provide my vehicle’s VIN?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We will provide clear instructions on how to do this. We cannot ship your part until we receive this information.
Is this a difficult part to install?
For most of the compatible vehicles, the PCM is located in the engine bay, often near the air filter box or under the battery tray. Installation typically involves disconnecting the battery, unplugging the electrical connectors, and unbolting the module. It is a straightforward job for a DIYer with basic tools. Because we pre-program the unit, no special electronic tools are needed.
Will I need to do anything after installation?
In some cases, a Case Relearn or Crankshaft Position Sensor Relearn procedure may be required to clear a remaining check engine light. This can be done with many professional-grade scan tools and is a simple procedure. However, the vehicle will start and run immediately after installation.
How do I know if this PCM will fit my vehicle?
Please check the extensive fitment list on this page. The most accurate way to confirm is to match the service number (e.g., 12586242) from your original computer to the numbers listed in our description. If you are unsure, please contact us with your VIN before ordering.
Do I need to send my old PCM back?
No, there is no core charge or requirement to return your original computer. You can keep it or dispose of it as you see fit.