Is your 2004 GMC Yukon or GM truck acting up? Stalling, running rough, or refusing to start can be incredibly frustrating, leaving you stranded and questioning your vehicle’s reliability. Don’t let a faulty engine computer dictate your schedule. This direct-fit Powertrain Control Module (PCM) is the definitive solution to restore your vehicle’s performance and get you back on the road with confidence. It arrives pre-programmed to your specific Vehicle Identification Number (VIN), eliminating the need for an expensive trip to the dealership.
Common Symptoms & Your Solution
If you’re experiencing any of the following issues, a failing PCM is the most likely culprit. This unit is designed to solve these exact problems:
- Erratic engine performance, including stalling or rough idling
- Failure to start or intermittent starting problems
- A persistent Check Engine Light, especially with codes like P0601, P0602, or P0606
- Poor fuel economy and loss of power
- Harsh or incorrect transmission shifting
- Communication issues with diagnostic scan tools
By replacing your old module with this professionally programmed 2004 GMC Yukon PCM 12586242, you’re not just swapping a part; you’re restoring the core of your vehicle’s operational command, ensuring all systems work in harmony as the factory intended.
Features & Tangible Benefits
- ✔ Plug & Drive Installation: This module comes fully programmed to your vehicle’s VIN. No extra flashing or dealer visits are required, saving you time and money.
- ✔ Updated GM Software: We flash each unit with the latest updates from General Motors, ensuring optimal fuel efficiency, emissions control, and engine performance.
- ✔ Guaranteed Compatibility: A perfect replacement for service numbers 12586242, 19299226, 89017738, and others, guaranteeing a seamless fit and function.
- ✔ Restored Dependability: Eliminate frustrating error codes and unpredictable behavior. Regain the confidence that your truck or SUV will start and run smoothly every single time.
- ✔ Complete Solution: This is the central computer that controls your engine and transmission. Replacing it is the key to resolving complex electronic issues.
- ✔ Peace of Mind Protection: This unit is backed by our one-year replacement warranty.
Expert Diagnostic Tip
A common trouble code pointing to a failed module is P0601: “Internal Control Module Memory Check Sum Error.” This code is a definitive sign of internal PCM failure. It means the computer’s own self-check has failed, and it can’t trust its own data. This isn’t a sensor or wiring issue you can chase down; it’s a fatal error within the module itself. The only reliable repair is to replace the PCM. Installing our pre-programmed 2004 GMC Yukon PCM 12586242 is the direct and permanent fix for this code.
Guaranteed Fitment For Your 2004 GM Vehicle
This module is the correct replacement for a wide range of 2004 General Motors trucks and SUVs. Please verify your part number or service ID to ensure compatibility. This part fits the following vehicles:
- AVALANCHE 1500: (LH front under battery), ID 12586242
- CADILLAC ESCALADE, ESV, EXT: (LH front under battery), ID 12586242
- CHEVROLET SSR: (next to air box), ID YHTN, YFKD, YFKX, YFXL, YFKF, YFKH, YFXM, YFXN, YFKJ, YFXP
- CHEVROLET SILVERADO 1500, 2500, 3500 PICKUP: (LH front under battery), gasoline, ID 12586242
- CHEVROLET SUBURBAN 1500, 2500: (LH front under battery), ID 12586242
- CHEVROLET TAHOE: (LH front under battery), ID 12586242
- CHEVROLET TRAILBLAZER EXT: 5.3L (next to air box), various IDs including YFXP, YFXN, YHTN, YFKD, YFXL, YFKJ, YFKF, YFKH, YFXM
- GMC ENVOY XL, XUV: 5.3L (next to air box), various IDs including YHTN, YFKH, YFXL, YFKX, YFXP, YFKD, YFKJ, YFXM, YFKF, YFXN
- GMC SIERRA 1500, 2500, 3500 PICKUP & DENALI: (LH front under battery), gasoline, ID 12586242
- GMC YUKON & YUKON XL 1500, 2500: (LH front under battery), ID 12586242
- HUMMER H2: (LH front under battery)
- ISUZU ASCENDER: 5.3L (LH engine)
- BUICK RAINIER: 5.3L (next to air box), various IDs including YFXL, YFKJ, YFXM, YFXN, YFXP, YHTN, YFKD, YFKH, YFKF, YFKX
After purchase, simply provide us with your VIN, and we will handle the programming. It’s that easy to get the right part for your truck. The correct 2004 GMC Yukon PCM 12586242 will restore your vehicle to its peak operational state.
Frequently Asked Questions
Do I need to program this computer?
No. The main benefit of our service is that we program the module for you before shipping. All you need to do is provide your vehicle’s VIN during or after checkout, and it will arrive ready for installation.
Where is the PCM located on my 2004 GM truck?
On most models listed, such as the Silverado, Sierra, Yukon, and Tahoe, the PCM is located under the hood on the driver’s side, mounted near or under the battery tray. On models like the Trailblazer and Envoy, it is typically located next to the air filter box in the engine bay.
Will I need to perform a security relearn procedure?
Yes, on virtually all of these GM vehicles, a security relearn (often called a Passlock or anti-theft relearn) is required after installation. This procedure syncs the new PCM with your vehicle’s anti-theft system. It is a simple process that does not require any special tools and typically takes about 30 minutes to complete. We can provide instructions for this procedure.
What is the difference between a PCM, ECM, and ECU?
The terms are often used interchangeably. PCM (Powertrain Control Module) is the most accurate term for this part, as it controls both the engine and transmission. ECM (Engine Control Module) and ECU (Engine Control Unit) are other common names for the same component.
Will this fix my check engine light?
If your check engine light is caused by an internal failure of your existing computer (e.g., code P0601), then this part is the correct fix. If the light is on due to a faulty sensor or other component, you will still need to address that separate issue.