Restore Peak Performance to Your GM Truck or SUV
Is your 2004 GMC Yukon, Sierra, Tahoe, or another GM vehicle suffering from perplexing electrical or performance issues? A failing Powertrain Control Module (PCM), the brain of your vehicle, is often the culprit behind a wide range of problems that can leave you stranded. This direct-fit replacement PCM, part number 12586242, is the definitive solution to get your vehicle running reliably again. We take the guesswork out of the repair by programming the module specifically for your vehicle using your VIN. It arrives with the latest GM software updates, ensuring optimal engine performance, fuel efficiency, and transmission shifting.
From the Diagnostic Bay
I once had a 2004 Silverado 1500 in the shop with a ghost of a problem. The owner had replaced the throttle body, mass airflow sensor, and all four oxygen sensors chasing an intermittent stalling issue and a persistent P0171 code (System Too Lean). The truck would run fine for days, then suddenly start idling rough and die at a stoplight. After hours of diagnostics, we traced the issue back to a failing driver circuit inside the original PCM. It was intermittently failing to properly command the fuel injectors. We installed a VIN-programmed PCM just like this one, performed a quick security relearn, and the truck ran perfectly. It’s a classic case where throwing parts at a problem costs more than correctly diagnosing the core issue—the computer itself.
Common Symptoms of a Failing PCM
If you’re experiencing any of the following issues, a faulty engine computer could be to blame. Don’t let a bad module compromise your vehicle’s safety and reliability. Look for these warning signs:
- ✔ Persistent Check Engine Light with various or no specific codes.
- ✔ Unexplained drops in fuel economy.
- ✔ Rough or erratic idling and engine stalling.
- ✔ Harsh or incorrect automatic transmission shifting.
- ✔ Engine misfires or loss of power.
- ✔ Complete no-start condition where the engine cranks but won’t fire up.
- ✔ Communication errors with diagnostic scan tools.
The Direct-Fit Solution for Your 2004 Yukon PCM
This isn’t just a generic part off a shelf. We ensure this module is a perfect match for your vehicle’s specific configuration. When you provide your Vehicle Identification Number (VIN) during checkout, our technicians flash the module with the most current, stable software directly from GM. This process guarantees that all factory parameters for your engine, transmission, and emissions systems are correctly loaded. This unit is a direct replacement for service numbers 12586242, 19299226, 89017738 and broadcast codes such as YFKD, YFKF, YFKH, YFKJ, YFKX, YFXL, YFXM, YFXN, YFXP, YHTN, ensuring broad compatibility across a wide range of 2004 GM models.
Simple Installation Process
Replacing the PCM is a straightforward process. On most trucks and SUVs like the Yukon, Sierra, and Escalade, the module is located under the hood on the driver’s side, near the battery. On models like the Envoy and Trailblazer, it’s typically next to the airbox. Simply disconnect the negative battery terminal, unplug the electrical connectors from the old PCM, unbolt it, and install the new one in its place. After reconnecting everything, you may need to perform a simple security relearn procedure, which can often be done without special tools. This gets your vehicle’s anti-theft system to recognize the new module, allowing the engine to start.
Frequently Asked Questions
Do I need to have this PCM programmed?
No. This PCM comes fully programmed to your vehicle’s specific VIN before it ships. It is ready to install right out of the box, loaded with the latest GM software updates for your vehicle.
Where is the PCM located on my 2004 Yukon or Silverado?
On most 2004 GM full-size trucks and SUVs (Yukon, Tahoe, Silverado, Sierra, Escalade), the PCM is located in the engine compartment on the driver’s side, typically under or next to the battery tray.
What is a security relearn procedure?
A security relearn, or anti-theft relearn, syncs the new PCM with your vehicle’s existing security system (Passlock/VATS). It’s a simple procedure that usually involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating two more times. This allows the vehicle to recognize the new module and authorize startup.
How do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit VIN. You can typically find your VIN on your vehicle’s dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
Will this module fit other vehicles besides the 2004 Yukon?
Yes, this PCM is compatible with a wide range of 2004 GM vehicles, including the Cadillac Escalade, Chevy Avalanche, Silverado, Suburban, Tahoe, GMC Sierra, Hummer H2, Buick Rainier, and more. Please verify your original part number matches one of the service numbers listed.