Is your dependable GM truck or SUV suddenly running rough, stalling, or refusing to start? A failing Powertrain Control Module (PCM) can be the source of countless frustrating and hard-to-diagnose issues. This isn’t just an inconvenience; it’s a roadblock that keeps your workhorse off the road. Restore the heart of your vehicle’s operations with this direct-fit, professionally programmed engine computer, specifically for service number 12586242 and a wide range of 2004 GM models.
Common Symptoms of a Failing PCM & Your Direct Solution
If you’re experiencing any of the following, a faulty PCM is the likely culprit. This unit is the definitive solution to get your vehicle running right again:
- No-Start or Hard-Starting: The engine cranks but won’t turn over, or takes an excessive amount of time to start.
- Check Engine Light with Communication Codes: You may see codes like P0601, P0602, or P0606, indicating an internal module failure.
- Erratic Performance: Unexplained stalling, rough idling, poor acceleration, and decreased fuel economy.
- Transmission Shifting Problems: Harsh or delayed shifts that aren’t related to a mechanical transmission fault.
- Apparent Sensor Failures: Multiple, unrelated sensor codes appearing at once can point to the PCM as the root cause.
By replacing your old module with our pre-programmed 2004 Yukon XL 2500 PCM 12586242, you are installing a reliable, updated solution that restores factory performance and communication.
Features & Benefits
- โ Plug & Play Installation: This computer arrives fully programmed to your vehicle’s specific VIN. No expensive trips to the dealership for flashing are required.
- โ Updated GM Software: We flash each module with the latest stable software updates from General Motors, ensuring optimal performance and efficiency.
- โ Guaranteed Compatibility: A perfect match for vehicles requiring service number 12586242 and the other compatible numbers listed, including a wide array of Sierra, Silverado, Tahoe, and Suburban models.
- โ Restores Original Performance: Eliminates the frustrating electrical issues caused by a failing original unit, bringing back the smooth operation and power you expect from your truck.
- โ Peace of Mind: This unit is backed by our one-year replacement warranty.
Expert Insight: The Critical Role of VIN Programming
Many people don’t realize that a PCM isn’t a one-size-fits-all part. Your truck has dozens of specific optionsโfrom its gear ratio and tire size to its security system (Passlock/VATS). Our VIN programming process tailors this module specifically to your vehicle’s factory build sheet. This critical step ensures seamless communication between all vehicle systems, preventing compatibility errors and saving you from the headache and expense of a post-installation dealer visit. You’re not just buying a part; you’re buying a complete, ready-to-install solution.
Frequently Asked Questions
Do I need to do any additional programming after installation?
No. This 2004 Yukon XL 2500 PCM 12586242 comes fully programmed to the VIN you provide. In most cases, it is a simple plug-and-play installation. Some vehicles may require a security relearn procedure, which is a simple process that can be done without any special tools and takes about 30 minutes. We include instructions for this procedure.
Where do I provide my vehicle’s VIN?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). You can typically add it as a note during checkout or reply to your order confirmation email with the information. We cannot ship your part until we receive the VIN.
How can I be sure this part will fit my vehicle?
Please check the service number on your current computer. This unit replaces service numbers 12586242, 19299226, 89017738, and a variety of 4-letter broadcast codes listed in the description. Matching one of these numbers ensures compatibility. Providing your VIN for programming is the final step to guarantee a perfect match.
Is this a difficult part to install?
For most 2004 GM trucks and SUVs, the PCM is located in the engine bay, typically under the battery tray or next to the airbox. It is held in by a few bolts and has several large electrical connectors. The physical replacement is straightforward for someone with basic mechanical skills. Always disconnect the battery before beginning the installation.
What if my original part number is not on your list?
If your part number or service code is not listed, please contact us with your vehicle’s information. We have a large inventory and can help you find the correct module for your specific application.