Restore Your Vehicle’s Core Performance
Is your 2004 GM truck or SUV suffering from frustrating and unpredictable issues? A faulty Powertrain Control Module (PCM) can be the hidden cause of everything from poor performance and stalling to a complete no-start condition. This replacement PCM, part number 12586242, is the definitive solution to get your dependable vehicle back on the road. We take the guesswork out of the repair by professionally programming the unit to your vehicle’s specific VIN with the latest factory software from GM. This isn’t just a replacement part; it’s a restoration of your vehicle’s brain, ready for a straightforward installation.
Common Symptoms & Your Solution
If you’re experiencing any of the following, a failing engine computer is the likely culprit. This pre-programmed 2004 GM 12586242 PCM is designed to resolve these exact problems:
- Erratic or harsh transmission shifting
- Unexplained Check Engine Light (CEL) illumination
- Engine stalling, stumbling, or misfiring
- Complete no-start or intermittent starting issues
- Poor fuel economy
- Communication error codes (U-codes) with scan tools
- Incorrect readings from various engine sensors
Features & Tangible Benefits
- ✔ VIN-Specific Programming: We flash the module with your vehicle’s exact VIN, ensuring it communicates perfectly with your existing systems right out of the box.
- ✔ Latest GM Software Updates: Your PCM arrives with the most current software, addressing common drivability issues and optimizing engine efficiency beyond the original calibration.
- ✔ Plug & Play Design: Once you perform the simple security relearn procedure (instructions provided), this unit is ready to go, saving you a costly trip to the dealership.
- ✔ Guaranteed Compatibility: This unit directly replaces service numbers 12586242, 19299226, 89017738, YFKD, YFKF, YFKH, YFKJ, YFKX, YFXL, YFXM, YFXN, YFXP, and YHTN.
- ✔ Restored Dependability: Eliminate the core electronic issues to bring back the reliable performance you expect from your truck or SUV.
- ✔ Purchase with Confidence: This unit is backed by our one-year replacement warranty.
An Expert’s Note on GM Software
As a technician, I’ve seen countless 2004-era GM vehicles come in with perplexing issues that even other shops couldn’t solve. Often, the root cause wasn’t a failed sensor, but outdated software in the original PCM that couldn’t properly interpret sensor data. By flashing every 2004 GM 12586242 PCM with the absolute newest GM updates, we’re not just fixing a hardware failure; we’re proactively solving known bugs and drivability problems that GM corrected years after your vehicle left the factory. This step is critical for a lasting, high-quality repair.
Frequently Asked Questions
Do I need to provide my VIN number?
Yes. Providing your Vehicle Identification Number (VIN) is mandatory. We use it to load the correct, vehicle-specific software and calibrations from GM, ensuring the module works perfectly with your engine, transmission, and options.
Is this part difficult to install?
The physical installation is typically straightforward, involving disconnecting the battery and swapping the module. After installation, you will need to perform a simple security relearn procedure (often called a Passlock or anti-theft relearn) so the PCM recognizes your vehicle’s keys. We can provide guidance for this simple, no-tool process.
How do I find my original part number?
Your original part or service number is printed on the sticker of your current PCM. It will be a number like 12586242 or a 4-letter code like YFKD. Matching one of the numbers listed in our description ensures compatibility.
Will this fix my specific check engine light codes?
This 2004 GM 12586242 PCM is the direct solution for codes related to internal module failure, memory errors, and communication faults. It can also resolve false sensor codes that appear when the computer itself is failing. However, always ensure the related sensors and wiring have been checked first.
Is any other programming required after installation?
No. Because we program it to your VIN before shipping, you will not need a trip to the dealer for expensive programming. The only step required on your end is the security relearn procedure.
