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 depend on. Whether it’s a persistent check engine light, sputtering performance, or a truck that refuses to start, a faulty Powertrain Control Module (PCM) can bring your day to a grinding halt. This isn’t just an inconvenience; it’s a disruption to your work, your family, and your peace of mind. This is the direct, reliable solution to restore your vehicle’s performance and get you back behind the wheel with confidence.
Common Symptoms & Your Solution
If you’re experiencing any of the following issues, a failing PCM is the likely culprit. This VIN-programmed unit is engineered to be the definitive fix for your 2004 GM vehicle, resolving problems that can sideline even the toughest trucks and SUVs.
- Persistent Check Engine Light: Especially with communication error codes (U-codes) or internal processor fault codes (P0601, P0602, P0603, P0604, P0605, P0606).
- No-Start or Hard-Start Condition: The engine cranks but won’t fire up, or takes an excessive amount of time to start.
- Poor Engine Performance: Noticeable loss of power, rough idling, stalling, and decreased fuel economy.
- Erratic Transmission Shifting: Harsh or delayed shifts that weren’t there before.
- Apparent Fuel or Ignition Issues: The PCM controls both fuel injectors and spark, and a failure can mimic a bad fuel pump or ignition coil.
Our process eliminates the guesswork and the expensive trip to the dealership. We take a genuine GM module, service number 12586242, and flash it with the latest, most stable software updates directly from GM, programmed specifically to your vehicle’s VIN. This ensures it works seamlessly with your exact configuration the moment you install it. The programmed 12586242 PCM is your path to a reliable repair.
Features & Benefits
- ✔ VIN-Specific Programming: We flash the unit with your vehicle’s unique VIN, ensuring perfect communication with all onboard systems and a hassle-free installation.
- ✔ Latest GM Software Updates: Your module arrives with the most current software, which can solve factory bugs and improve fuel efficiency, idle quality, and transmission performance.
- ✔ True Plug-and-Play Solution: Because the programming is done for you, you can avoid costly dealership programming fees. In most cases, installation is straightforward.
- ✔ Broad OEM Compatibility: This single unit correctly replaces a wide range of original service numbers, including 19299226, 89017738, YFKD, YFKF, and many more, guaranteeing you receive the correct part.
- ✔ This unit is backed by our one-year replacement warranty.
Expert Insight: The Work Truck That Wouldn’t Start
We recently helped a contractor with his 2004 Silverado 2500HD. His truck, the lifeblood of his business, would crank but not start. After replacing the battery and checking the fuel pump, he was stumped. His mechanic diagnosed a failed PCM and quoted him over $1,100 for a new one plus programming. Instead, he ordered this exact programmed 12586242 PCM from us. It arrived two days later, he installed it in under 30 minutes in his driveway, and the truck fired up on the first try. He was back on the job site the next morning, having saved hundreds of dollars and critical downtime.
Frequently Asked Questions
What information do you need from me?
After you complete your purchase, we will need the Vehicle Identification Number (VIN) from your 2004 GM vehicle. This allows us to program the module with the correct software and calibrations for your specific engine, transmission, and options.
Is any additional programming required after installation?
In most cases, no. Our VIN programming handles the critical engine and transmission software. However, on these specific GM vehicles, you may need to perform a simple, 10-30 minute Security Relearn procedure (also known as CASE relearn) so the vehicle recognizes the new computer. This procedure can be done without any special tools and instructions are readily available online.
How do I find my original part number?
Your vehicle’s original PCM will have a sticker on it with the service number. On most of these trucks and SUVs, the PCM is located in the engine bay, either on the driver’s side fender well under the battery tray or next to the airbox. This unit replaces service number 12586242 and many others listed in the description.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the original PCM (such as codes P0601-P0606), then this part is the correct solution. It’s crucial to properly diagnose the vehicle first, as the check engine light can be triggered by many other components like sensors or wiring issues.
Is this compatible with my 2004 GMC Yukon XL 1500?
Yes, absolutely. This programmed 12586242 PCM is the correct computer for the 2004 Yukon XL 1500, as well as a wide range of other GM trucks and SUVs from that year, including the Silverado, Sierra, Tahoe, Suburban, Escalade, and more. Providing your VIN guarantees we match it perfectly.