Bring Your GM Truck Back to Life
Is your 2004 Escalade, Sierra, or Tahoe feeling sluggish, stalling unexpectedly, or throwing confusing check engine lights? A failing Powertrain Control Module (PCM) can be the culprit, turning your reliable workhorse into a source of daily frustration. This isn’t just an inconvenience; it’s a matter of safety and confidence. We’re here to provide the definitive solution: a professionally programmed OEM Engine Control Module, part number 12586242, that restores your vehicle’s performance and your peace of mind.
Forget the expensive dealership visits and the hassle of finding a local shop to program a new computer. We handle the critical step for you. Upon purchase, simply provide us with your vehicle’s VIN, and our technicians will flash this module with the latest GM-certified software specific to your truck or SUV. This ensures seamless communication between your engine, transmission, and all related systems, just as the factory intended. You’re not just buying a part; you’re investing in a reliable, worry-free driving experience.
A Mechanic’s Pro-Tip
Before you replace your PCM, take a moment to inspect your battery terminals for corrosion and ensure your main engine and chassis ground connections are clean and tight. A poor ground can mimic PCM failure, causing erratic behavior and communication codes. A few minutes with a wire brush can sometimes save you a lot of diagnostic headaches!
Warning Signs and Lasting Benefits
A failing PCM can manifest in numerous ways. If you’re experiencing any of the following, this module is the solution you need to get back on the road with confidence.
- ✔ Check Engine Light is on with codes like P0601, P0602, P0606, or other communication-related DTCs.
- ✔ Your vehicle fails to start or stalls intermittently for no apparent reason.
- ✔ Noticeable decrease in fuel economy and overall engine performance.
- ✔ Harsh or erratic shifting from your automatic transmission.
- ✔ Unexplained electrical issues or warning lights on the dashboard.
Guided Installation for Your 2004 Escalade PCM
We’ve made this repair as straightforward as possible. With our pre-programmed module, you’re just a few simple steps away from a smooth-running vehicle. While a security relearn procedure is required, it’s a simple process you can do right in your driveway.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the Module: On most compatible trucks and SUVs, the PCM is located in the engine bay, on the driver’s side, often under or near the battery tray or next to the airbox.
- Disconnect and Remove: Carefully unplug the wiring harness connectors. They have locking tabs that need to be released. Once disconnected, unbolt the old module from its mounting bracket.
- Install the New PCM: Mount your new, pre-programmed PCM in the same location. Securely reconnect the wiring harnesses, ensuring they click into place.
- Reconnect Power: Reattach the negative battery terminal and tighten it securely.
- Perform Security Relearn: You will need to perform a simple key-cycle security relearn procedure to sync the new PCM with your vehicle’s anti-theft system. This typically takes about 30 minutes and instructions are readily available online or in your owner’s manual.
Guaranteed Fit for Your Vehicle
This module is a direct-fit replacement for a wide range of 2004 GM trucks and SUVs. It is compatible with multiple service numbers, including 12586242, 19299226, 89017738, YFKD, YFKF, YFKH, YFKJ, YFKX, YFXL, YFXM, YFXN, YFXP, and YHTN. Please verify your part number or consult the list below to ensure compatibility.
- Cadillac: Escalade, Escalade ESV, Escalade EXT
- Chevrolet: Avalanche 1500, Silverado (1500, 2500, 3500), SSR, Suburban (1500, 2500), Tahoe, Trailblazer EXT
- GMC: Envoy XL, Envoy XUV, Sierra (1500, 2500, 3500), Sierra Denali, Yukon, Yukon XL (1500, 2500)
- Buick: Rainier (5.3L)
- Hummer: H2
- Isuzu: Ascender (5.3L)
Frequently Asked Questions
Do I need to have this computer programmed?
No! That’s the best part. We program the computer for you using the VIN you provide during checkout. It will arrive ready for installation and a simple security relearn procedure.
How do I provide my vehicle’s VIN?
After you complete your purchase, you will receive instructions on how to send us your VIN. We cannot ship your part until we receive this information, as the programming is specific to your exact vehicle.
What is a security relearn procedure?
It’s a simple process that syncs the new PCM to your vehicle’s existing anti-theft system and keys. It typically involves a series of key turns and waiting periods, takes about 30 minutes, and requires no special tools.
Will this fix my transmission problems?
In many cases, yes. The PCM controls both engine and transmission functions. If your original module was faulty, it could cause poor shifting, incorrect gear selection, and other transmission issues. A new, correctly programmed PCM often resolves these problems.
My original part has a different service number. Will this still work?
Yes, this module is a direct replacement for all service numbers listed in the description, including YFKD, YFKF, YFKH, and others. GM often consolidates part numbers, and this unit contains the hardware and software capabilities to serve all listed applications.
Is there a warranty included?
Absolutely. This part comes with a comprehensive warranty that covers any defects in the module or the programming. We stand behind our work to ensure you have complete confidence in your repair.