Get Your Silverado Back on the Road, Fast.
Is your dependable 2004 Silverado 1500 suddenly unreliable? A failing Powertrain Control Module (PCM) is one of the most common and frustrating issues for these trucks, leading to problems that can sideline your vehicle and disrupt your work day. This isn’t just a replacement part; it’s a complete, pre-programmed solution designed to restore your truck’s factory performance and get you back behind the wheel with confidence. We handle the complex programming for you, so you can focus on the straightforward installation.
Common Symptoms & Your Solution
If your truck is experiencing any of the following, a faulty engine computer is the likely culprit. This unit is the definitive solution for:
- Persistent Check Engine Light (CEL)
- Diagnostic Trouble Codes (DTCs) like P0601, P0602, or P0606
- Rough or erratic idling
- Poor fuel economy
- Harsh or incorrect transmission shifting
- Engine stalling or hesitation during acceleration
- Complete no-start condition where the engine cranks but won’t fire
Don’t let a bad module lead to incorrect diagnoses of other expensive parts. Replacing your faulty computer with our expertly programmed 2004 Silverado 1500 PCM is the most effective way to solve these electronic issues for good.
Features & Benefits
- ✔ VIN-Programmed for Your Truck: We flash this module with your vehicle’s specific VIN and the latest GM-released software updates. This ensures perfect compatibility and eliminates the need for an expensive trip to the dealership for programming.
- ✔ True Plug-and-Play Installation: Once you receive the unit, installation is straightforward. In most cases, you will only need to perform a simple security relearn procedure that you can do yourself right in your driveway.
- ✔ Restored Engine & Transmission Performance: With fresh software and correct calibration, you’ll notice smoother shifting, a stable idle, and the responsive performance you expect from your truck’s engine.
- ✔ Direct-Fit OEM Replacement: This unit is a direct replacement for service number 12586242 and a wide range of other compatible service numbers, guaranteeing a perfect fit and connection in the original location (LH front, under the battery).
- ✔ This unit is backed by our one-year replacement warranty. We stand behind our programming and the quality of our components, giving you peace of mind with your purchase.
From the Technician’s Bench:
“We had a customer with a 2004 Sierra, nearly identical to the Silverado, that was shifting hard from 1st to 2nd. He’d already replaced the transmission solenoids with no luck and was about to spend thousands on a full transmission rebuild. He brought it to us for a second opinion. We scanned it and found no transmission codes, but saw a history of intermittent communication loss with the PCM. We swapped in one of our pre-programmed modules, performed the security relearn, and the truck shifted like it just rolled off the factory floor. It saved him a massive headache and an even bigger repair bill. Never underestimate the brain of the vehicle.”
This 2004 Silverado 1500 PCM is also a direct fit for a wide variety of other 2004 GM vehicles, including the Sierra, Tahoe, Suburban, Yukon, Escalade, Hummer H2, and more. Please verify your original service number matches one of the compatible numbers listed: 12586242, 19299226, 89017738, YFKD, YFKF, YFKH, YFKJ, YFKX, YFXL, YFXM, YFXN, YFXP, or YHTN.
Frequently Asked Questions
Do I need to get this computer programmed?
No. The main benefit of our service is that we program the computer for you before shipping it. All you need to do is provide your vehicle’s VIN at checkout, and it will arrive ready to install.
What is a security relearn procedure?
This is a simple procedure that syncs the new PCM with your vehicle’s anti-theft system. It typically involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating the cycle three times. We include detailed instructions to make it easy.
Will this fix my specific problem?
If your vehicle’s issues match the symptoms listed and you have diagnosed the PCM as the faulty component, this unit is the correct solution. It is designed to resolve all internal module failures, including common processor and memory faults.
How do I find my original service number?
Your original service number is printed on the white sticker on top of your existing engine computer. It will be a large 8-digit number (like 12586242) or a 4-letter code (like YFXM).
Is this a difficult part to install?
For most DIYers with basic tools, this is a straightforward job. The PCM is located under the battery on the driver’s side. You’ll need to disconnect the battery, remove it, unbolt the PCM bracket, and carefully unplug the wiring harnesses. The entire process usually takes less than an hour.
What information do you need from me?
After you place your order, you must provide us with your 17-digit Vehicle Identification Number (VIN). This is critical for us to program the 2004 Silverado 1500 PCM with the correct software for your truck’s specific options.