Get Your GM Truck Back in Action
Is your 2004 Yukon, Sierra, or Silverado plagued by frustrating issues like stalling, erratic shifting, a persistent check engine light, or a complete no-start condition? These are classic signs of a failing Powertrain Control Module (PCM), the computer that acts as your vehicle’s brain. Don’t let a faulty computer keep your reliable truck or SUV parked. This professionally programmed engine computer is the definitive solution to restore your vehicle’s performance and get you back on the road with confidence.
Common Symptoms & Your Solution
A failing PCM can cause a wide range of problems that can be difficult to diagnose. If you’re experiencing any of the following, this part is your answer:
- Failure to start or intermittent stalling
- Poor engine performance and reduced power
- Decreased fuel economy
- Harsh or incorrect automatic transmission shifting
- Check Engine Light with communication-related Diagnostic Trouble Codes (DTCs) like P0601, P0605, or P0606
This is not just a replacement part; it’s a complete, ready-to-install solution. We flash this 2004 Yukon XL 1500 PCM 12586242 with the latest dealer-authorized software from GM, specifically matched to your vehicle’s unique Vehicle Identification Number (VIN). This critical step ensures that all systems, from the engine and transmission to the anti-theft system, function exactly as they did from the factory.
Expert Insight: The “Ghost in the Machine” Fixed
We recently worked with a customer whose 2004 Silverado 2500 had an intermittent no-start problem that had stumped two different repair shops. They had replaced the battery, alternator, and crank sensor with no success. The issue was a microscopic crack in the original PCM’s circuit board that would separate when the engine bay got hot. Installing our pre-programmed 2004 Yukon XL 1500 PCM 12586242 solved the issue in under an hour, saving the owner from hundreds more in diagnostic fees. Sometimes the most complex electrical gremlins have a surprisingly simple solution.
Features & Benefits
- âś” Plug & Play Installation: Because we program the module to your specific VIN, it arrives ready to install. No need for an expensive trip to the dealership for additional programming.
- âś” Updated GM Software: Your computer will be loaded with the most current software available, ensuring optimal fuel efficiency, emissions, and transmission shift patterns.
- âś” Guaranteed Compatibility: This unit is a direct replacement for service number 12586242 and a wide range of other part numbers including YFKD, YFKF, YFKH, YFKJ, YFKX, and more, ensuring a perfect fit for your GM truck or SUV.
- âś” Resolves Common Drivability Issues: Puts an end to frustrating electrical problems caused by a faulty original computer, restoring the smooth and reliable operation you depend on.
- âś” Peace of Mind Protection: This unit is backed by our one-year replacement warranty.
After you complete your purchase, simply provide us with your vehicle’s VIN. Our technicians will handle the programming, so you receive a part that’s truly ready to go. Restore your truck’s core performance with a reliable, correctly programmed 2004 Yukon XL 1500 PCM 12586242.
Frequently Asked Questions
Do I need to program this computer after I receive it?
No. We program the computer to the VIN you provide before we ship it. This makes the installation process as simple as possible. In some cases, a simple security relearn procedure may be required, which can be done without any special tools.
How do I provide my VIN number?
You can add your VIN to the order notes during checkout, or you can reply to your order confirmation email with the information. We will not ship the part until we have your VIN to ensure correct programming.
Is this the correct part for my vehicle?
This computer is compatible with a wide range of 2004 GM trucks and SUVs that use service number 12586242 or any of the other part numbers listed in the description. The best way to confirm is to check the service number on your current computer. If you’re unsure, contact us with your VIN, and we’ll be happy to verify fitment for you.
Where is the PCM located on my truck?
On most of these GM models, the PCM is located in the engine bay. Common locations are on the driver’s side, under the battery tray (for trucks like the Sierra/Silverado) or next to the air filter box (for SUVs like the Trailblazer/Envoy).
What if this doesn’t fix my problem?
While this PCM is often the solution to many electrical issues, we always recommend a proper diagnosis by a qualified technician. If the unit is found to be defective, it is covered by our one-year replacement warranty.