Restore Peak Performance and Drive with Confidence
Is your trusty 2004 GM truck or SUV suddenly acting up? Unexplained stalling, rough idling, a persistent check engine light, or a complete no-start condition can be incredibly frustrating, leaving you stranded and questioning your vehicle’s reliability. These are classic signs that the very brain of your engine, the Powertrain Control Module (PCM), may be failing. It’s time to stop the guesswork and restore the dependable performance you rely on. This replacement Engine Control Module, part number 12586242, is the definitive solution, arriving pre-programmed to your vehicle’s specific VIN for a seamless installation.
Symptoms of a Failing PCM & Benefits of Replacement
If your vehicle is experiencing any of the following issues, a failing computer is a likely culprit. Replacing it will bring back the smooth operation and peace of mind you’ve been missing.
- ✔ Check Engine Light: Often with communication error codes like P0601, P0602, or P0606.
- ✔ Engine Stalling: Unexpected shutdowns at idle or while driving.
- ✔ No-Start Condition: The engine cranks but refuses to start due to lack of fuel or spark commands.
- ✔ Poor Fuel Economy: Inefficient engine operation causing more trips to the pump.
- ✔ Erratic Shifting: The PCM also influences transmission behavior, and failure can lead to harsh or incorrect shifts.
- ✔ Failed Emissions Test: A malfunctioning module cannot properly manage the engine’s emissions systems.
From the Mechanic’s Bay: A Sierra’s Second Chance
A customer brought in his ’04 Sierra 1500, a truck he’d owned since new. It had developed a maddening intermittent stall and was throwing a P0601 internal memory error. He was worried he’d have to replace his beloved truck. We diagnosed a failing PCM. After installing one of our VIN-programmed modules, the truck fired up instantly and idled perfectly smooth. The look of relief on his face was immense. It wasn’t just about fixing a part; it was about restoring his connection to a vehicle full of memories. That’s the confidence this repair provides.
Effortless Installation for a Lasting Fix
We make this repair as straightforward as possible. By programming the module before it ships, we eliminate the need for expensive dealership tools or towing. Here’s a general guide to get you back on the road:
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the Module: On most of these trucks and SUVs, the 2004 Yukon PCM is located in the engine bay, on the driver’s side, under or next to the battery tray. On models like the Trailblazer or Envoy, it’s typically next to the airbox.
- Disconnect Connectors: Carefully unplug the wiring harness connectors from the old module. There are typically release tabs that need to be depressed.
- Remove the Old PCM: Unbolt the old module from its mounting bracket. Keep the hardware as you’ll need it for the new unit.
- Install the New PCM: Mount your new, pre-programmed module in the same location and securely reconnect the wiring harnesses. You should hear a ‘click’ as they lock in place.
- Reconnect Battery: Re-attach the negative battery terminal. The vehicle may need to go through a brief idle relearn procedure, but it is now ready to start.
Guaranteed Fitment for Your Vehicle
This module is a direct replacement for service number 12586242 and is compatible with a wide range of 2004 GM vehicles. Please verify your model and existing part number from the list below. It is cross-compatible with service numbers: 19299226, 89017738, YFKD, YFKF, YFKH, YFKJ, YFKX, YFXL, YFXM, YFXN, YFXP, and YHTN.
- Buick Rainier (5.3L)
- Cadillac Escalade, ESV, EXT
- Chevrolet Avalanche 1500
- Chevrolet Silverado 1500, 2500, 3500 (Gasoline)
- Chevrolet SSR
- Chevrolet Suburban 1500, 2500
- Chevrolet Tahoe
- Chevrolet Trailblazer EXT (5.3L)
- GMC Envoy XL, XUV (5.3L)
- GMC Sierra 1500, 2500, 3500 (Gasoline)
- GMC Sierra Denali
- GMC Yukon & Yukon XL 1500, 2500
- Hummer H2
- Isuzu Ascender (5.3L)
Don’t let a faulty computer keep you off the road. Ordering our pre-programmed 2004 Yukon PCM is the fastest and most reliable way to restore your vehicle’s health and your driving confidence. Place your order today and feel the difference a properly functioning engine brain makes.
Frequently Asked Questions
Do I need to do any programming myself?
No, you do not. This module is sold as a plug-and-play solution. We flash it with the latest GM software updates using the VIN you provide during checkout, so it’s ready for installation right out of the box.
Where do I find my VIN?
Your 17-digit Vehicle Identification Number (VIN) can be found on the driver’s side of the dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
What is the security relearn procedure?
In most cases, a security relearn is not necessary. However, if the vehicle’s anti-theft system engages, a simple 10-minute key-on/key-off procedure is usually all that’s required. Instructions are readily available online and are very easy to follow.
Is this a new or used part?
This is a high-quality, inspected, and tested original equipment part that has been professionally prepared for your vehicle. We ensure every unit meets strict performance standards before programming and shipping.
What if I have the wrong part number?
This module replaces several service numbers, including 12586242, YFKF, YFKH, and more. As long as your vehicle is on the compatibility list and you provide the correct VIN, we will ensure the programming is a perfect match for your vehicle’s configuration.