Is Your Dependable GM Truck or SUV Suddenly Unreliable?
If you’re dealing with a persistent check engine light, erratic engine performance, harsh shifting, or even a no-start condition in your 2004 Yukon XL, the Powertrain Control Module (PCM) is the most likely culprit. As the central computer for your engine and transmission, its failure can cause a host of frustrating and difficult-to-diagnose problems. This isn’t just a replacement part; it’s the definitive, plug-and-drive solution to restore your vehicle’s performance and get you back on the road with confidence.
Common Symptoms of a Failing PCM & Your Solution
A faulty engine computer can mimic many other mechanical issues, leading to wasted time and money on unnecessary repairs. If you’re experiencing any of the following, a failing PCM is a strong possibility:
- Unexplained Check Engine Light (CEL) with various codes
- Poor fuel economy and loss of power
- Engine stalling, stumbling, or rough idling
- Harsh or erratic automatic transmission shifting
- Vehicle won’t start, despite a good battery and starter
- Communication error codes (U-codes)
This module is the solution. We take a genuine GM PCM, service number 12586242, and program it specifically to your vehicle’s VIN. This ensures that all factory settings, security information, and operational parameters are perfectly matched to your truck, eliminating the need for an expensive trip to the dealership for programming. We install the latest GM-released software updates, so you’re not just replacing the partโyou’re getting the most refined and reliable version of your vehicle’s operating system. This is the most reliable way to fix the core problem and restore the dependability you expect from your vehicle. Using a properly programmed 2004 Yukon XL 1500 PCM 12586242 is critical for long-term vehicle health.
Features & Benefits
- โ Plug & Drive Installation: Arrives pre-programmed to your exact VIN. Simply install the module and perform the security relearn procedureโno dealership visit required.
- โ Latest GM Software: We flash the unit with the newest calibrations from General Motors, ensuring optimal performance, fuel efficiency, and emissions control.
- โ Solves Complex Issues: The correct fix for a wide range of driveability problems, from check engine lights to intermittent stalling and transmission faults.
- โ Broad Compatibility: This unit directly replaces multiple service numbers including 12586242, 19299226, 89017738, YFKD, YFKF, YFKH, YFKJ, YFKX, and more.
- โ Guaranteed Performance: This unit is backed by our one-year replacement warranty, giving you confidence in your repair.
Expert Technician’s Note
With over two decades of hands-on diagnostics, I’ve seen countless vehicle owners chase phantom problems, replacing perfectly good sensors and parts, only to find the PCM was the root cause. The key is programming. A module from a salvage yard won’t work because it’s locked to the donor vehicle’s VIN and security system. Our VIN programming service is what makes this a true, effective solution. We ensure this 2004 Yukon XL 1500 PCM 12586242 communicates perfectly with your truck’s other modules (like the BCM and anti-theft system) right out of the box, saving you from the compatibility nightmares that come with used, unprogrammed computers.
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 shipping. However, you will need to perform a security relearn procedure once it’s installed, which pairs the new PCM to your vehicle’s anti-theft system. This procedure can typically be done without special tools and instructions can be found online or in a service manual.
How 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). We cannot ship the part until we receive this information, as the programming is specific to your vehicle.
Is this the correct part for my truck/SUV?
This PCM fits a wide range of 2004 GM vehicles. Please check the extensive fitment list on this page and, most importantly, match the service number (e.g., 12586242, YHTN) from your original computer to the numbers listed in our description to guarantee compatibility.
What if my original part number isn’t listed?
If you cannot find your specific part or service number, please contact us with your vehicle’s information. We can help verify fitment and find the correct module for your needs.
What tools are required for installation?
Installation typically requires basic hand tools, such as a socket set and ratchet, to remove and replace the module. The most important first step is to disconnect the vehicle’s battery before you begin to prevent any electrical damage.