Restore Your Vehicle’s Heartbeat and Drive with Confidence
Is your truck or SUV plagued by frustrating, intermittent issues? A rough idle, poor acceleration, or a stubborn check engine light can turn any drive into a stressful experience. These are often the tell-tale signs of a failing Powertrain Control Module (PCM), the central computer of your vehicle. It’s time to stop guessing and replace the source of the problem. This professionally programmed PCM, part number 12586242, is the definitive solution to restore your vehicle’s performance, reliability, and your peace of mind.
We take the complexity out of the repair. Simply provide us with your vehicle’s VIN during checkout, and our technicians will flash this module with the latest, most stable software updates directly from GM. This ensures perfect compatibility and function right out of the box. You’re not just buying a part; you’re getting a plug-and-play solution engineered to bring your engine and transmission back into perfect harmony.
Symptoms of a Failing PCM and the Benefits of This Solution
- ✔ No-Start or Hard-Starting: Regain the confidence of a vehicle that starts reliably every time.
- ✔ Check Engine Light (CEL) Illumination: Permanently resolve persistent trouble codes like P0601, P0602, P0606, or other internal processor faults.
- ✔ Poor Fuel Economy: A correctly functioning PCM ensures the optimal air-fuel mixture, restoring your vehicle’s efficiency.
- ✔ Erratic Shifting or Transmission Issues: Smooth out gear changes by restoring communication between the engine and transmission.
- ✔ Stalling or Rough Idle: Enjoy a smooth, stable engine performance at all speeds.
- ✔ Guaranteed Compatibility: Programmed specifically to your VIN, this module eliminates compatibility guesswork.
An Expert’s Note: The End of the “Ghost in the Machine”
“I once had a customer with a 2004 Sierra who had spent months and hundreds of dollars chasing what he called a ‘ghost.’ The truck would randomly stall at traffic lights, but never stored a consistent code. He’d replaced sensors and wiring to no avail. The moment we installed a VIN-programmed PCM, the problem vanished. The relief on his face was immense—it wasn’t just about fixing the truck; it was about ending the daily anxiety of not knowing if his vehicle would let him down. That’s the real value of this repair.”
Guided Installation to Restore Peak Performance
Installing your new 2004 SSR PCM is a straightforward process that a confident DIYer can complete. Our pre-programming service handles the most difficult step, leaving you with a simple physical swap.
- Safety First: Begin by disconnecting the negative terminal on your vehicle’s battery to prevent any electrical shorts.
- Locate the Old Module: On most compatible vehicles, the PCM is located in the engine bay, either next to the airbox or under the battery on the driver’s side.
- Disconnect and Remove: Carefully unplug the wiring harnesses. They have locking tabs that need to be released. Once disconnected, unbolt the 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 the locking tabs click into place.
- Reconnect Power: Re-attach the negative battery terminal and tighten it.
- Final Step – Security Relearn: You will need to perform a simple security relearn procedure (often called a ‘key-on, key-off’ sequence) to sync the new PCM with your vehicle’s anti-theft system. This process typically takes about 30 minutes and instructions are readily available online for your specific model.
Guaranteed Fitment for Your Vehicle
This module is a direct replacement for service numbers 12586242, 19299226, 89017738, YFKD, YFKF, YFKH, YFKJ, YFKX, YFXL, YFXM, YFXN, YFXP, and YHTN. It is confirmed to fit the following 2004 models:
- Buick Rainier (5.3L)
- Cadillac Escalade, ESV, EXT
- Chevrolet Avalanche 1500
- Chevrolet SSR
- Chevrolet Silverado 1500, 2500, 3500 (Gasoline)
- 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, Yukon XL 2500
- Hummer H2
- Isuzu Ascender (5.3L)
Frequently Asked Questions
Do I need to do any programming myself?
No. We handle all the programming before shipping. The module will arrive flashed with the latest GM software and coded to the specific VIN you provide, making it ready for installation.
How do I provide my vehicle’s VIN?
After completing your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). You can typically reply to your order confirmation email or use the contact form on our website. We cannot ship the part until we receive your VIN.
Will this fix my specific problem?
This PCM is a direct solution for issues caused by internal module failure, often indicated by codes like P0601, P0606, or network communication errors. While it resolves many common electrical and performance problems, we always recommend a proper diagnosis by a qualified technician to confirm the PCM is the root cause.
What is the security relearn procedure?
The security relearn, or anti-theft relearn, is a simple procedure that syncs the new PCM to your vehicle’s keys and security system. It typically involves a sequence of turning the key to the ‘ON’ position for 10 minutes, then ‘OFF’ for 10 seconds, repeated three times. Specific instructions for your model are widely available online and are easy to follow.
Is this a brand new part?
This is a professionally inspected and verified original equipment part that has been programmed with the most current software for your vehicle, ensuring OEM-level performance and reliability.