Is Your 2004 GM Truck or SUV Running Rough?
Dealing with a finicky engine, poor fuel economy, or a persistent check engine light in your 2004 Yukon, Sierra, or Silverado can be incredibly frustrating. When the brain of your vehicle—the Powertrain Control Module (PCM)—starts to fail, it can cause a cascade of problems that leave you stranded and stressed. This isn’t just an inconvenience; it’s a disruption to your work, your family life, and your peace of mind. You need a reliable solution that gets you back on the road without the dealership hassle or high costs. This is the definitive, pre-programmed replacement 2004 GMC Yukon 12586242 PCM you’ve been searching for.
Common Symptoms & Your Solution
A failing PCM can manifest in numerous ways. If you’re experiencing any of the following, a faulty module is the likely culprit:
- Check Engine Light (CEL) with codes like P0601, P0602, P0604, or P0606
- Harsh or erratic transmission shifting
- Engine stalling, misfiring, or running poorly
- Complete no-start condition
- Reduced fuel efficiency
- Communication errors with diagnostic scan tools
This unit is the direct solution. We take a genuine GM module, flash it with the latest official GM software updates specifically for your vehicle’s VIN, and ship it directly to you. This process ensures perfect compatibility and optimal performance, correcting those frustrating issues and restoring the dependable operation you expect from your truck.
Features & Benefits
- ✔ True Plug & Play Installation: This module arrives programmed to your vehicle’s unique VIN. No expensive trips to the dealer for programming are necessary. Simply install the part, and you’re ready to go.
- ✔ Updated GM Calibrations: We load the newest software from General Motors, which often includes improvements to fuel economy, emissions, and transmission shift points that weren’t available when your truck was new.
- ✔ Guaranteed Compatibility: This PCM is a direct replacement for service numbers 12586242, 19299226, 89017738, YFKD, YFKF, YFKH, YFKJ, YFKX, YFXL, YFXM, YFXN, YFXP, and YHTN, ensuring it’s the right part for a wide range of 2004 GM trucks and SUVs.
- ✔ Built to Last: Each module is meticulously inspected and prepared to meet or exceed original factory standards for performance and longevity.
- ✔ Peace of Mind Protection: This unit is backed by our one-year replacement warranty.
A Technician’s Insight: Over my 20 years in the shop, I’ve seen countless issues caused by improperly programmed or generic control modules. A common mistake is thinking any module with the same part number will work. The reality is that the software inside is just as critical as the hardware. It needs to match your vehicle’s specific options—from the engine and transmission to the axle ratio. Our VIN-specific programming eliminates that guesswork. We ensure the brain we send you is perfectly matched to your vehicle’s body, restoring its performance the right way, the first time.
Frequently Asked Questions
What information do you need from me after I order?
After you complete your purchase, we will need the 17-digit Vehicle Identification Number (VIN) from your 2004 GM vehicle. This allows us to program the module with the exact software and calibrations for your specific truck or SUV.
Do I need to program this module myself?
No. This is a fully programmed, plug-and-play solution. The programming is completed by our expert technicians before the part is shipped to you. In most cases, you will not need any special tools or procedures beyond the physical installation.
Where is the PCM located on my 2004 Yukon or Sierra?
On most of the compatible full-size trucks and SUVs like the Yukon, Tahoe, Silverado, and Sierra, the PCM is located in the engine bay on the driver’s side, under the battery tray. On models like the Trailblazer and Envoy, it is typically found next to the air filter box.
How do I know for sure that my PCM is the problem?
While the symptoms listed above are strong indicators, the best way to confirm a bad PCM is with a proper diagnosis from a qualified technician. Common diagnostic trouble codes (DTCs) pointing to internal module failure, such as P0601 (Internal Control Module Memory Check Sum Error), are a definitive sign.
Will this fit vehicles other than the 2004 GMC Yukon?
Yes, absolutely. This 2004 GMC Yukon 12586242 PCM is compatible with a wide array of 2004 GM models, including the Chevrolet Silverado, Tahoe, Suburban, SSR, Trailblazer, Cadillac Escalade, GMC Sierra, Envoy, Buick Rainier, Hummer H2, and Isuzu Ascender. Please check the detailed fitment list on this page to confirm your specific model and engine.