Restore Peak Performance to Your 2004 GM Truck or SUV
Is your 2004 GM truck or SUV running rough, shifting erratically, or failing to start? A faulty Powertrain Control Module (PCM) is often the hidden culprit behind these frustrating issues, leaving you stranded and searching for a reliable solution. This replacement engine computer, compatible with service number 12586242, is the definitive fix. We take the guesswork out of the repair by programming the module specifically to your vehicle’s VIN before it ever leaves our facility. This ensures a seamless integration, restoring the dependable performance you rely on every day.
Common Symptoms of a Failing GM PCM & Your Solution
If you’re experiencing any of the following, a failing PCM is a likely cause. This unit is designed to solve these problems directly:
- Persistent Check Engine Light (CEL) with no clear cause
- Engine stalling, sputtering, or random misfires
- Harsh or unpredictable automatic transmission shifting
- A complete no-start condition where the engine cranks but won’t fire
- Poor fuel economy and loss of power
- Communication errors with diagnostic scan tools (U-codes)
By installing our programmed 2004 GM PCM 12586242, you are providing your vehicle with a fully updated and correctly configured control unit, addressing the root cause of these electronic failures.
Features & Benefits
- โ๏ธ Pre-Programmed to Your VIN: We flash the module with your vehicle’s specific information and the latest GM software. This ensures compatibility and often eliminates the need for a costly trip to the dealership.
- โ๏ธ Direct-Fit Replacement: Engineered to replace service number 12586242 and a wide range of compatible part numbers (including YFKD, YFKF, YFKH, YFKJ, YFKX, YFXL, YFXM, YFXN, YFXP, and YHTN), guaranteeing a perfect match.
- โ๏ธ Restores Original Performance: A new brain for your engine resolves issues like rough idling, poor acceleration, and incorrect transmission shifting, bringing back the smooth, reliable operation you depend on.
- โ๏ธ Simplified Installation: While a security relearn procedure is typically required, having the unit pre-programmed saves you the most complex and expensive step. Get your vehicle running again with minimal downtime.
- โ๏ธ One-Year Warranty Coverage: This unit is backed by our one-year replacement warranty. Drive with the peace of mind that comes from a quality part and dedicated support.
Expert Insight: The Ghost in the Machine
As a technician for over 20 years, I’ve seen countless owners of these great 2004 GM trucks chase their tails replacing perfectly good sensors. A customer with a Silverado 1500 once spent hundreds on new O2 sensors and a mass airflow sensor, but the intermittent stalling and weird shifting never stopped. The problem wasn’t the sensors; it was the PCM providing them with faulty reference voltages. These P107-based computers can fail internally in ways that create phantom issues. Installing a properly programmed 2004 GM PCM 12586242 didn’t just fix his truck; it ended months of frustration and restored his confidence in his vehicle.
Frequently Asked Questions
Do I need to send my old computer (core) back?
No. There is no core charge or core return required for this part. You can keep or recycle your old module at your convenience.
Is this part truly “plug and play”?
Because this PCM arrives programmed to your VIN, it eliminates the most difficult step. However, on virtually all GM vehicles of this era, you will need to perform a security relearn procedure so the PCM recognizes your specific keys. This is a simple process that typically involves turning the key on for 10-15 minutes, three consecutive times. Instructions are readily available online for this “Key Relearn Procedure.”
How do I provide you with my VIN?
After you complete your purchase, please send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot program and ship your module without it. You can usually find your VIN on your vehicle’s registration, insurance card, or on the driver’s side of the dashboard near the windshield.
Will this fix my transmission shifting problems?
In many cases, yes. The PCM controls both engine and transmission functions. If the module is sending incorrect signals to the transmission solenoids, it can cause erratic shifting, delayed engagement, or slipping. A new PCM with fresh programming often resolves these communication-based transmission issues.
How can I be sure this fits my vehicle?
This module fits a wide range of 2004 GM trucks and SUVs that use service number 12586242 or one of its equivalents. The most important step is providing us with your VIN. This allows us to load the exact correct software for your vehicle’s engine, transmission, and options, guaranteeing compatibility.