Restore Peak Performance to Your 2004 GM Truck or SUV
Is your 2004 GMC Envoy XUV, Sierra, Silverado, or another compatible GM vehicle suffering from frustrating issues like a persistent check engine light, rough idling, stalling, or poor fuel economy? These are classic symptoms of a failing Powertrain Control Module (PCM), the central computer responsible for managing your engine’s performance. Don’t let a faulty computer keep your reliable truck off the road. This direct-replacement PCM, service number 12586242, is the solution you need to restore your vehicle’s original drivability and efficiency.
From the Diagnostic Bay
We had a 2004 Sierra 1500 come into the shop with a laundry list of complaints from the owner: intermittent stalling at red lights, hesitation on acceleration, and a check engine light that three different mechanics couldn’t seem to fix. They had replaced the throttle body, mass air flow sensor, and multiple oxygen sensors, all to no avail. After hooking up our professional scan tool, we noticed erratic data streams coming from the PCM itself. The internal processors were failing, sending incorrect commands to the very components that had been replaced. We installed a VIN-programmed PCM, performed the security relearn, and the truck ran like it just rolled off the factory floor. The owner was thrilled to finally have a reliable vehicle again, proving that starting with the ‘brain’ is often the right diagnosis.
Is a Failing PCM the Source of Your Problems?
- ✔ Check Engine Light: Your check engine light is illuminated with codes related to multiple, unrelated sensors.
- ✔ No-Start Condition: The engine cranks but refuses to start, even with a good battery and fuel supply.
- ✔ Poor Engine Performance: You’re experiencing rough idling, engine stalling, hesitation, or a noticeable loss of power.
- ✔ Reduced Fuel Economy: The PCM is failing to properly manage the air-fuel mixture, causing your vehicle to consume more gasoline than usual.
- ✔ Failed Emissions Test: A malfunctioning computer can prevent your vehicle from passing a smog or emissions inspection.
- ✔ Communication Errors: Your mechanic’s scan tool cannot communicate with the engine computer.
Why Choose Our Programmed 2004 Envoy XUV PCM?
This isn’t just a part in a box. We provide a comprehensive solution designed for a seamless installation. When you purchase this 2004 Envoy XUV PCM, you are getting a module that has been meticulously prepared for your exact vehicle. We flash it with the latest, most stable software updates directly from GM. This process ensures optimal engine performance, fuel efficiency, and transmission shifting. Most importantly, we program the module using the Vehicle Identification Number (VIN) you provide. This critical step ensures the PCM communicates perfectly with your vehicle’s other systems, including the anti-theft system, preventing frustrating no-start issues after installation.
This module is a direct replacement for service number 12586242 and is also compatible with a wide range of other service numbers, including 19299226, 89017738, YFKD, YFKF, YFKH, YFKJ, YFKX, YFXL, YFXM, YFXN, YFXP, and YHTN. Simply confirm your service number, provide your VIN upon purchase, and get ready for a straightforward repair.
Frequently Asked Questions
Do I need to program this PCM?
No. We handle all the programming for you before shipping. We will flash the unit with the latest GM software and program it to the specific VIN you provide, making it ready for installation right out of the box.
What is a VIN and why do you need it?
The VIN (Vehicle Identification Number) is a unique 17-digit code for your specific vehicle. We use it to load the correct software and security information into the PCM, ensuring it works perfectly with your truck’s engine, transmission, and options.
Will this fix my check engine light?
If the check engine light is caused by a faulty PCM, then yes, this part will resolve the issue. However, it’s essential to ensure that the underlying cause of the codes is not a separate faulty sensor or wiring problem. This PCM will fix codes directly related to internal computer failure.
Is any special installation required after I plug it in?
In most cases, you will need to perform a simple security relearn procedure after installation. This procedure syncs the new PCM with your vehicle’s anti-theft system and can typically be done in your driveway without any special tools. Instructions are widely available online for your specific model.
How do I find my original part or service number?
Your original service number is printed on a sticker on the PCM itself. On most 2004 GM trucks and SUVs, the PCM is located in the engine bay, either next to the airbox or under the battery tray on the driver’s side.