Restore Your Vehicle’s Heartbeat and Your Peace of Mind
Is your truck or SUV feeling sluggish, unpredictable, or refusing to start? A faulty Powertrain Control Module (PCM) can feel like a complex, frustrating problem, turning your dependable vehicle into a source of constant worry. This isn’t just an inconvenience; it’s a disruption to your life. We understand that feeling of uncertainty. That’s why we offer this precision-programmed engine computer, designed to be the straightforward, reliable solution that gets you back on the road with confidence.
This isn’t just a replacement part; it’s a restoration of your vehicle’s core functionality. As the ‘brain’ of your engine and transmission, the PCM governs everything from fuel mixture and ignition timing to shift points. When it fails, the symptoms can be widespread and confusing. Our unit, programmed specifically to your vehicle’s unique Vehicle Identification Number (VIN), eliminates the guesswork and the need for expensive dealership programming. It arrives ready to install, transforming a daunting repair into a manageable project.
Telltale Signs of a Failing PCM
If you’re experiencing any of the following issues, a failing engine computer could be the culprit. Replacing it can bring back the smooth, reliable performance you’ve been missing.
- ✔ Check Engine Light: The light is on, and you may have diagnostic trouble codes (DTCs) like P0601, P0602, P0606, or other communication errors.
- ✔ Engine Stalling or Misfiring: Your vehicle may stall unexpectedly while driving or at idle, and you might notice rough running or misfires.
- ✔ No-Start Condition: The engine cranks but refuses to start, even with a good battery and starter.
- ✔ Poor Fuel Economy: A sudden and unexplained drop in your vehicle’s gas mileage can point to inefficient engine management by a faulty PCM.
- ✔ Erratic Transmission Shifting: The PCM also controls transmission functions, so you might experience harsh shifts, delayed engagement, or getting stuck in one gear.
A Mechanic’s Note: The Intermittent Gremlin
“I once had a customer with a 2004 Sierra whose truck would stall randomly at red lights, but never consistently enough to diagnose easily. He’d been to three other shops. We traced it back to an internal fault in the PCM that only occurred once the unit heated up. Swapping in a VIN-programmed module didn’t just fix the stall; it gave him back the trust in his truck he had completely lost. That’s the real goal of any repair—restoring that worry-free confidence.”
Guided Installation to Restore Performance
Installing your new PCM is a straightforward process. With our pre-programming service, you bypass the most complicated steps. Here’s a simple guide to get you started:
- Safety First: Begin by disconnecting the negative terminal of your vehicle’s battery to prevent any electrical shorts.
- Locate the Old PCM: On most of these GM trucks and SUVs, the PCM is located in the engine bay, either next to the airbox or under the battery tray on the driver’s side.
- Disconnect and Remove: Carefully unplug the wiring harness connectors. They have locking tabs that need to be released. Once disconnected, unbolt the module from its mounting bracket and remove it.
- Install the New Unit: Mount your new, pre-programmed PCM in the same location. Secure the bolts and then firmly reconnect the wiring harnesses, ensuring they click into place.
- Final Step: Reconnect the negative battery terminal. The vehicle may need to go through a brief ‘relearn’ procedure, which often just involves a few minutes of idling and normal driving.
Why Choose Our Pre-Programmed 2004 SSR PCM?
This module, service number 12586242, is the definitive solution for a wide range of 2004 GM vehicles. By providing us with your VIN at checkout, you ensure that the unit you receive is loaded with the latest GM software updates specific to your vehicle’s original configuration. This critical step guarantees seamless communication between all your vehicle’s systems, proper engine and transmission function, and a hassle-free, plug-and-play installation.
Guaranteed Fit for Your Vehicle
This Electronic Control Module is a direct replacement for units with service numbers 12586242, 19299226, 89017738, YFKD, YFKF, YFKH, YFKJ, YFKX, YFXL, YFXM, YFXN, YFXP, or YHTN. It is designed to fit the following 2004 models:
- Chevrolet Avalanche, Silverado, SSR, Suburban, Tahoe, Trailblazer EXT
- GMC Envoy XL/XUV, Sierra, Sierra Denali, Yukon, Yukon XL
- Cadillac Escalade, Escalade ESV, Escalade EXT
- Buick Rainier
- Hummer H2
- Isuzu Ascender (5.3L)
Please verify your original part’s service number to ensure compatibility. If you have any questions, our team is here to help you confirm the perfect fit for your ride.
Do I need to do any programming after I receive it?
No. This PCM is delivered fully programmed to your vehicle’s VIN with the latest GM software. It is a plug-and-play solution. In some cases, a security relearn procedure may be necessary, which can typically be done without special tools.
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows us to flash the module with the exact software calibration that your vehicle had when it left the factory. This ensures all systems, options, and emissions components work together correctly.
Where is the service number on my old PCM?
The service number is printed on a sticker on the case of your original PCM. It will typically be a multi-digit number, sometimes accompanied by a 4-letter broadcast code (like YFXN).
Will this fix my specific problem?
While this module corrects a wide range of common issues, proper vehicle diagnosis is always recommended. This part will resolve problems directly caused by a faulty PCM, such as internal processor errors (P0601) or communication failures.
Is this a difficult part to install for a DIYer?
For most DIYers with basic tools, this is a very manageable job. The most important parts are safely disconnecting the battery and being careful with the wiring harness connectors. Since the programming is done for you, the hardest part is already handled.