Is Your Truck or SUV Running Rough? Get It Back in Top Shape.
If your 2004 GMC Yukon, Sierra, Silverado, or other compatible GM vehicle is suffering from frustrating issues like a persistent check engine light, poor fuel economy, erratic shifting, or a no-start condition, a failing Powertrain Control Module (PCM) is often the culprit. Don’t let a faulty computer keep your reliable workhorse off the road. This professionally programmed PCM is the definitive solution to restore your vehicle’s performance, reliability, and drivability.
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 module is your answer:
- Check Engine Light: Especially with communication-related codes (U-codes) or internal processor codes (P0601, P0606).
- Engine Performance Issues: Stalling, hesitation, misfires, or a sudden drop in power and fuel efficiency.
- Transmission Problems: Harsh or delayed shifting, or the transmission getting stuck in one gear (limp mode).
- No-Start Condition: The engine cranks but won’t start, often due to a lack of fuel injector or ignition coil signals.
- Failed Emissions Test: Inability to pass smog due to persistent fault codes or system monitors not running.
This replacement 2004 GMC Yukon PCM 12586242 arrives ready to install, taking the guesswork out of the repair. We program it using your vehicle’s VIN, ensuring it has the correct calibration and the latest software updates from GM for optimal function.
Features & Benefits
- ✔ VIN-Programmed for Your Vehicle: No need for expensive trips to the dealership. This module is plug-and-play, programmed specifically for your truck or SUV before it ships.
- ✔ Flashed with Latest GM Updates: We load the most current software available, which can resolve factory bugs and improve overall engine and transmission performance.
- ✔ Restores Original Performance: Get back the smooth idle, crisp throttle response, and reliable operation you depend on every day.
- ✔ Direct-Fit Replacement: Guaranteed to fit and function correctly in all vehicles listed, replacing part numbers 12586242, 19299226, 89017738, and many more.
- ✔ Cost-Effective Solution: A smart, affordable alternative to the high costs of a new computer and programming services from a dealer.
- ✔ Purchase with Confidence: This unit is backed by our one-year replacement warranty.
Expert Insight: A Mechanic’s Pro-Tip
Before replacing any PCM, I always tell my customers to perform two simple checks first: ensure your battery is fully charged and that all main engine and chassis ground connections are clean, tight, and free of corrosion. A weak battery or a bad ground can mimic PCM failure by causing low voltage and communication errors. Verifying these basics can sometimes save you from an unnecessary repair, but if they check out, this programmed 2004 GMC Yukon PCM 12586242 is the next logical step to a lasting fix.
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 exact software and calibrations for your specific engine, transmission, and options.
Is any additional programming required after installation?
For most vehicles, this module is a plug-and-play installation. However, some models may require a security relearn procedure (often called CASE relearn or Passlock relearn), which can typically be done without special tools. Instructions are widely available online, or your mechanic can perform it in a few minutes.
How do I find my part number to confirm a match?
Your original PCM’s part number is printed on a sticker on the unit itself. It is often located under the hood, near the battery or airbox. This unit replaces a wide range of service numbers, including 12586242, 19299226, 89017738, and many others listed in the fitment guide.
Will this fix my specific problem?
This PCM is a direct solution for failures of the original engine computer. While it corrects a vast array of engine performance and communication issues, it’s essential to ensure your vehicle’s problem has been properly diagnosed. This module will not fix issues caused by faulty sensors, wiring, or other mechanical components.
Is this a brand new part from the dealer?
This is a high-quality, inspected, and tested replacement part that has been programmed to meet or exceed original factory specifications. It provides a reliable and affordable solution for getting your vehicle back on the road.