Restore Peak Performance to Your GM Truck or SUV
Is your 2004 GMC Envoy XUV, Sierra, Tahoe, or another GM vehicle on our fitment list running rough, shifting erratically, or showing a persistent Check Engine Light? These frustrating issues often point directly to a failing Powertrain Control Module (PCM), the central brain of your vehicle. This replacement module is the definitive, hassle-free solution to get your truck or SUV running reliably again. We take all the guesswork out of the process by pre-programming this unit specifically for your vehicle using your VIN, loading it with the latest official GM software updates. This ensures seamless communication between your engine, transmission, and all other onboard systems.
Common Symptoms of a Failing GM PCM & Your Solution
A faulty engine computer can cause a wide range of problems that can be difficult to diagnose. If you’re experiencing any of the following, a replacement 2004 Envoy XUV 5.3L Engine Computer is the most likely solution:
- Persistent Check Engine Light (CEL)
- Engine stalling, stuttering, or misfiring
- Harsh or erratic automatic transmission shifting
- Noticeable decrease in fuel economy
- Vehicle won’t start, despite a good battery and starter
- Communication error codes (U-codes)
Instead of paying for expensive dealership diagnostics and programming, this module arrives ready for installation, providing a direct and effective fix for these complex electrical issues.
Features & Benefits
- ✔ VIN-Specific Programming: We flash the module with your vehicle’s exact VIN, ensuring it works perfectly with your factory options and security system right out of the box.
- ✔ Plug & Play Installation: No need for a trip to the dealer. Once installed, you may only need to perform a simple security relearn procedure, which can be done in your own driveway.
- ✔ Updated GM Software: Your module comes loaded with the newest software updates from General Motors, which can resolve factory bugs and improve overall performance and efficiency.
- ✔ Guaranteed Compatibility: This unit is a direct replacement for service numbers 12586242, 19299226, 89017738, YFKD, YFKF, YFKH, and more, covering a wide range of 2004 GM trucks and SUVs.
- ✔ Restore Original Performance: Get your engine and transmission operating in perfect harmony again, restoring lost power, fuel efficiency, and smooth operation.
- ✔ Peace of Mind: This unit is backed by our one-year replacement warranty.
An Expert’s Note on VIN Programming: In my 20+ years of diagnostics, I’ve seen countless drivers create bigger problems by using a generic module from a junkyard. A mismatched computer can cause transmission damage, security lockouts, and a host of electrical nightmares. Our process of programming this module specifically to your vehicle’s VIN isn’t just a convenience—it’s a critical step to ensure every system, from the engine to the anti-lock brakes, communicates correctly, just as the factory intended. This is the right way to replace your 2004 Envoy XUV 5.3L Engine Computer.
Don’t let a faulty PCM keep your reliable GM vehicle off the road. This is your opportunity to solve the problem correctly and permanently. By providing us with your VIN after purchase, you ensure you receive a component that is perfectly matched to your vehicle, making for a smooth and successful repair. This is the most reliable way to restore the brain of your 2004 Envoy XUV 5.3L Engine Computer and get back to driving with confidence.
Frequently Asked Questions
Do I need to do any programming myself?
No. We program the computer to your vehicle’s VIN before shipping it to you. In most cases, it is a plug-and-play installation, though you may need to perform a simple security relearn procedure which involves a few cycles of the ignition key.
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 have programmed it.
How do I know if this is the right part for my vehicle?
The best way to confirm compatibility is to match the service number from your original computer to one of the numbers listed in this description (e.g., 12586242, YFKH, etc.). Our extensive fitment list also covers the compatible models. If you are unsure, please contact us with your VIN.
What is the difference between a PCM, ECM, and ECU?
These terms are often used interchangeably. ECM (Engine Control Module) and ECU (Engine Control Unit) typically refer to a computer that only controls engine functions. PCM (Powertrain Control Module) is more common in modern vehicles as it controls both the engine and the transmission. For your vehicle, this part serves as the PCM.
What if my original service number isn’t on your list?
If your service number is not listed, please contact us before ordering. GM often has multiple part numbers that can be interchanged, and we can help you verify if this unit is the correct one for your application.