Get Your Truck Back on the Road, Fast.
Is your 2004 Sierra 2500 or GM truck suffering from frustrating and hard-to-diagnose issues? A faulty Powertrain Control Module (PCM) can cause a host of problems, from a persistent Check Engine Light and poor fuel economy to rough idling, stalling, or even a no-start condition. Don’t let a failing engine computer keep your truck sidelined. This pre-programmed PCM is the definitive solution to restore your vehicle’s performance, reliability, and drivability.
Common Symptoms & Your Solution
If you’re experiencing any of the following, a failing PCM is the likely culprit:
- Erratic or harsh transmission shifting
- Unexplained drop in fuel mileage
- Engine stalling or cutting out unexpectedly
- Difficulty starting the engine
- Diagnostic Trouble Codes (DTCs) such as P0601, P0602, or P0606
This replacement 2004 Sierra 2500 PCM 12586242 is the reliable, straightforward fix. We take the guesswork and expense out of the repair by programming the unit specifically for your vehicle using your VIN. It arrives ready for installation, loaded with the latest factory software from GM to ensure your engine runs at its absolute best.
Expert Insight: Why Pre-Programming is Non-Negotiable
In the past, replacing a PCM meant towing your vehicle to a dealership for expensive programming. Installing a non-programmed or incorrectly programmed module can lead to a no-start condition, immobilizer system lockouts, and even damage to other components. Our process eliminates that risk. By flashing the module with your truck’s unique VIN data and the newest GM calibrations before it ships, we ensure compatibility and optimal function right out of the box. While a simple security or CASE relearn procedure may be required after installation (a 10-30 minute process you can do yourself), the critical, complex programming is already handled by our experts.
Features & Tangible Benefits
- โ VIN-Programmed for Your Truck: Simply provide your Vehicle Identification Number after purchase, and we’ll handle the rest. This means no extra trips or costly programming fees at the dealership.
- โ Loaded with Latest GM Updates: Your engine will benefit from the most current software, often improving fuel efficiency, emissions, and shifting performance over the original calibration.
- โ Direct OEM Replacement: Engineered to be a perfect match for service number 12586242 and others listed, guaranteeing a perfect fit and seamless communication with your vehicle’s systems.
- โ Tested for Dependability: Each module undergoes rigorous checks to ensure it’s ready to handle the demands of your work truck or family SUV.
- โ This unit is backed by our one-year replacement warranty.
This module is a direct replacement for service numbers: 12586242, 19299226, 89017738, YFKD, YFKF, YFKH, YFKJ, YFKX, YFXL, YFXM, YFXN, YFXP, and YHTN. Restore the dependable performance you need with a quality 2004 Sierra 2500 PCM 12586242.
Frequently Asked Questions
How does the programming process work?
It’s simple. After you complete your purchase, you will need to send us your vehicle’s 17-digit VIN. Our technicians will use this number to flash the module with the exact software and calibrations specified by GM for your truck’s engine, transmission, and options.
Is this part truly ‘plug and play’?
Because the core programming is done for you, it’s about as close as it gets. In many cases, you can install it and start the vehicle. However, some GM vehicles will require a simple security relearn procedure to sync the new PCM with your keys. This can typically be done in your driveway in under 30 minutes with no special tools required.
How do I confirm this is the right part for my vehicle?
The best way is to check the service number on your original computer. This module replaces part number 12586242 and many others listed in the description. If your number matches one of those, and your vehicle is on the fitment list, you have found the correct part.
Will this PCM fix my check engine light?
If the check engine light is caused by an internal failure of the original PCM (common codes include P0601-P0606), then this part is the correct fix. However, it’s always essential to properly diagnose the root cause of any fault code, as other sensors or wiring issues can also trigger a warning light.
What is the warranty on this computer?
This unit is backed by our one-year replacement warranty, giving you confidence and peace of mind in your repair.
Does this fit vehicles other than the Sierra 2500?
Yes. This PCM is compatible with a wide range of 2004 GM trucks and SUVs, including the Silverado, Tahoe, Suburban, Yukon, Escalade, Hummer H2, and more. Please refer to the detailed fitment list to confirm compatibility with your specific model.