Restore Your Truck’s Heartbeat and Your Peace of Mind
Is your trusty 2004 GM truck or SUV suddenly acting up? Unexplained stalling, erratic shifting, a persistent check engine light, or a complete no-start situation can be incredibly frustrating, leaving you stranded and questioning your vehicle’s reliability. These are classic signs that the brain of your engine, the Powertrain Control Module (PCM), is failing. Don’t let a faulty computer sideline your workhorse. This direct-fit PCM, service number 12586242, is the definitive solution to get you back on the road with confidence and power.
We take the guesswork and dealership hassle out of the equation. Each module is meticulously programmed to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This ensures seamless communication between your engine, transmission, and other systems, restoring the crisp performance and dependable operation you expect from your vehicle. Regain that worry-free drive, knowing your vehicle’s core electronic system is functioning flawlessly with the latest GM software updates.
Guided Installation for a Confident Repair
- Safety First: Begin by disconnecting the negative terminal of your vehicle’s battery to prevent any electrical shorts.
- Locate the Module: On most compatible trucks and SUVs like the Silverado, Sierra, and Suburban, the PCM is located in the engine bay on the driver’s side, typically under or next to the battery tray.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old module. They have locking tabs that need to be released. Once disconnected, unbolt the old PCM from its mounting bracket.
- Install the New PCM: Mount your new, pre-programmed module in the same location. Securely reconnect the wiring harnesses, ensuring they click into place.
- Power Up: Reconnect the negative battery terminal. Your vehicle is now ready to go. In some cases, a simple security relearn procedure (often called a CASE relearn) may be required, which can be done without special tools.
Symptoms of a Failing 2004 Suburban 1500 PCM
If you’re experiencing any of the following, a faulty engine computer is a likely culprit. Replacing it can restore your vehicle’s health and prevent further damage.
- ✔ Persistent Check Engine Light (CEL) with communication-related codes (e.g., U0100, P0601, P0606).
- ✔ Engine stalling, sputtering, or refusing to start.
- ✔ Harsh or unpredictable automatic transmission shifting.
- ✔ A significant drop in fuel economy.
- ✔ Failure to pass state emissions testing.
- ✔ Other warning lights on the dash, such as ABS or traction control, may illuminate due to communication loss.
An Expert’s Note: The Dealership Alternative
“I remember a customer with a beautiful ’04 Sierra Denali. It was stalling randomly, and he was quoted over a thousand dollars by the dealer for a new computer plus programming fees. He was about to give up on his beloved truck. We sent him one of these pre-programmed modules. He called back a few days later, ecstatic. He’d installed it himself in under 30 minutes and the truck ran better than it had in years. It’s not just about selling a part; it’s about empowering owners to make reliable, affordable repairs and keep their vehicles on the road.”
Tailored Fit for Your Ride
This module is a direct replacement for service numbers 12586242, 19299226, 89017738 and many others. It is guaranteed to be compatible with the following 2004 models. Please verify your service number or contact us for confirmation.
- 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
Is this part truly plug-and-play?
Yes! Because we program the module to your vehicle’s VIN before shipping, it is ready for installation right out of the box. In a small number of cases, a security relearn procedure is needed, which you can typically perform yourself without any special tools.
How do I provide my VIN?
After you complete your purchase, you will receive instructions on how to send us your vehicle’s 17-digit VIN. We cannot ship your order until we receive this information, as it is essential for the programming process.
What if my original part number isn’t on the list?
The list of service numbers (e.g., YFKH, YFXL) shows many compatible units. The primary part number is 12586242. If you are unsure, please contact us with your VIN, and our experts will verify compatibility for you.
What is a PCM?
The Powertrain Control Module (PCM), also known as the Engine Control Module (ECM), is a powerful computer that controls all aspects of your vehicle’s engine and transmission performance, including fuel mixture, ignition timing, and shift points.
Do I need to return my old module?
No core charge or return is required for this part, saving you time and the hassle of shipping your old, faulty unit back.