Is Your 2004 GM Truck or SUV Acting Up?
If your 2004 GMC Envoy XUV, Sierra, Chevrolet Silverado, or another compatible GM vehicle is experiencing perplexing issues like stalling, erratic shifting, or a persistent check engine light, the root cause is often a failing Powertrain Control Module (PCM). As the central computer for your engine and transmission, a faulty PCM can create a cascade of problems that are difficult to diagnose. Don’t let a failing module keep your reliable truck off the road. This direct-fit replacement PCM, part number 12586242, is the definitive solution to restore your vehicle’s performance and reliability.
The Plug-and-Play Solution for Your 2004 Envoy XUV PCM
We eliminate the most significant barrier to PCM replacement: the need for expensive dealership programming. When you order from us, you provide your vehicle’s Vehicle Identification Number (VIN), and our technicians will flash the module with the latest, most up-to-date software directly from GM. This ensures that the computer is perfectly matched to your vehicle’s specific configuration, including its engine, transmission, and emissions equipment. The module arrives at your door ready for installation, saving you time, money, and the hassle of towing your vehicle to a shop.
From the Diagnostic Bay
We recently had a 2004 Chevy Tahoe come into the shop on a tow truck. The owner had spent a fortune replacing the fuel pump, spark plugs, and even the throttle body trying to solve an intermittent no-start and stalling issue. After connecting our diagnostic scanner, we immediately noticed a loss of communication with the engine controller. A quick check of the PCM’s power and ground circuits confirmed they were good. The original PCM had an internal failure. We installed one of our pre-programmed 12586242 units, performed the quick security relearn, and the Tahoe fired right up and ran perfectly. The customer was thrilled to have a simple, effective solution after months of frustration.
Common Symptoms of a Failing PCM
- ✔️ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔️ Unexplained engine stalling or cutting out while driving.
- ✔️ Rough idling or engine misfires.
- ✔️ Noticeable decrease in fuel economy.
- ✔️ Harsh or erratic automatic transmission shifting.
- ✔️ The vehicle cranks but refuses to start.
- ✔️ Failure to pass an emissions test.
- ✔️ Intermittent loss of power or hesitation during acceleration.
Guaranteed Fitment and Compatibility
This PCM is a direct replacement for a wide range of 2004 GM trucks and SUVs. It is compatible with multiple service numbers, ensuring a perfect match for your original unit. Compatible service numbers include: 12586242, 19299226, 89017738, YFKD, YFKF, YFKH, YFKJ, YFKX, YFXL, YFXM, YFXN, YFXP, and YHTN. By providing your VIN, you guarantee that you receive a module correctly configured for your exact vehicle, whether it’s an Envoy XUV, Rainier, SSR, Sierra, Silverado, Suburban, Tahoe, Hummer H2, Escalade, or Avalanche.
Simple Installation Process
Installation is straightforward for the DIY mechanic. On vehicles like the Envoy XUV, Trailblazer, and Rainier, the PCM is typically located in the engine bay, next to the air filter box. On trucks like the Sierra and Silverado, it’s often found under the battery tray on the driver’s side. After disconnecting the battery, simply unplug the electrical connectors from the old module, remove it, and install the new one. Once the new PCM is connected and the battery is reconnected, you may need to perform a simple security relearn procedure, which often involves turning the key to the ‘ON’ position for 10-15 minutes. This procedure can typically be done without any special tools and instructions are widely available.
Frequently Asked Questions
Do I need to have this computer programmed?
No. This is the primary benefit of our service. We program the computer for you using your vehicle’s VIN before we ship it. It arrives ready to be installed, saving you a trip to the dealership.
What information do you need from me?
After you complete your purchase, you will need to provide us with your vehicle’s 17-digit VIN. This is crucial for us to load the correct GM-certified software for your specific vehicle configuration.
Where is the PCM located on my 2004 Envoy XUV?
On the 2004 GMC Envoy XUV and similar platforms like the Trailblazer EXT and Buick Rainier, the PCM is located in the engine compartment on the driver’s side, right next to the air filter housing.
What is a security relearn or CASE learn?
After installing the new PCM, your vehicle’s anti-theft system needs to synchronize with the new module. This is a simple procedure that usually involves cycling the ignition key and waiting for a short period. In some cases, a Crankshaft Variation Relearn (CASE learn) may be needed with a scan tool to clear certain engine codes, but the vehicle will typically run and drive without it.
Will this PCM fit other vehicles?
Yes, this PCM fits a wide range of 2004 GM trucks and SUVs equipped with the 5.3L or 6.0L V8 engines, including the Sierra, Silverado, Tahoe, Suburban, Yukon, Escalade, and Hummer H2. Please verify your original part or service number to ensure compatibility.