Get Your Truck Running Right Again
Is your 2004 GM truck or SUV suffering from frustrating and hard-to-diagnose issues? A failing Powertrain Control Module (PCM) can be the hidden cause of poor performance, stalling, or a complete no-start condition. This direct-fit engine computer, service number 12586242, is the definitive solution to get your vehicle back on the road with the reliability you depend on. We take the guesswork out of the repair by programming the module to your vehicle’s specific Vehicle Identification Number (VIN) before it ships, ensuring a seamless installation process. Restore the power and dependability you expect from your vehicle with a properly calibrated PCM.
Common Symptoms & Your Solution
If you’re experiencing any of the following, a faulty PCM is the likely culprit. This unit is the solution for issues such as:
- Engine misfires, stumbling, or poor acceleration
- Intermittent or complete no-start conditions
- Harsh or erratic transmission shifting
- Reduced fuel economy
- Check Engine Light with communication-related Diagnostic Trouble Codes (DTCs) like P0601, P0602, or P0606
- Instrument cluster warning lights staying on
By replacing your old module with this professionally programmed 2004 Silverado 2500 PCM 12586242, you are installing a fresh, reliable brain for your vehicle’s most critical systems.
Features & Benefits
- ✔ VIN-Specific Programming: Arrives pre-flashed with the latest GM software updates for your exact vehicle. Just provide your VIN after purchase.
- ✔ Plug-and-Play Design: Once the security relearn procedure is performed, this module is ready to go, minimizing vehicle downtime.
- ✔ Restored Performance: Corrects engine and transmission control issues, restoring smooth operation and optimal fuel efficiency.
- ✔ Guaranteed Compatibility: A direct replacement for service number 12586242 and a wide range of other compatible service numbers.
- ✔ Cost-Effective Repair: Avoid the high costs and scheduling delays of a dealership visit with a solution you can trust.
- ✔ Peace of Mind: This unit is backed by our one-year replacement warranty.
Expert Insight: Why VIN Programming is Critical
As a technician, I’ve seen countless vehicle owners buy a used computer from a salvage yard, only to find it causes more problems than it solves. A PCM isn’t a simple one-size-fits-all part. It’s programmed with specific data for the original vehicle’s engine, transmission, tire size, and options package. Installing an incorrectly programmed module can lead to shifting problems, incorrect speedometer readings, and persistent error codes. Our process of flashing the module with your specific VIN ensures that the computer you receive is perfectly matched to your vehicle’s factory specifications, just like a new one from the dealer.
This module is the correct fit for a massive range of 2004 GM vehicles, including the Sierra, Suburban, Tahoe, Yukon, Escalade, Hummer H2, and more. To ensure perfect fitment, please verify that your original module’s service number is listed: 12586242, 19299226, 89017738, YFKD, YFKF, YFKH, YFKJ, YFKX, YFXL, YFXM, YFXN, YFXP, or YHTN. Get the right part, the first time, with this reliable 2004 Silverado 2500 PCM 12586242.
Frequently Asked Questions
Do I need to do anything after I install this PCM?
Yes. While the main engine and transmission programming is complete, you will need to perform a security relearn procedure (often called Passlock or VATS relearn) so the module can communicate with your vehicle’s anti-theft system and keys. This procedure can typically be done without special tools and instructions are readily available online for your specific model.
How do I provide my VIN?
After you complete your purchase, simply send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot program and ship your module without it.
Is this the right part for my vehicle?
This PCM fits a wide variety of 2004 GM trucks and SUVs. The best way to confirm compatibility is to check the service number on the label of your current PCM. If it matches 12586242 or any of the other numbers listed in the description, this is the correct part for you.
What does “programmed” mean?
Programming, or “flashing,” means we load the module with the specific GM factory software that your vehicle requires to operate correctly. This includes data for your engine size, transmission type, and other factory-installed options, all based on your VIN.
Where is this module located on my vehicle?
On most GM trucks and full-size SUVs like the Silverado, Sierra, and Tahoe, the PCM is located in the engine bay on the driver’s side, under or next to the battery. On mid-size SUVs like the Trailblazer and Envoy, it’s typically found next to the air filter box.