Restore Peak Performance to Your 2004 GM Truck or SUV
Is your trusty 2004 Sierra, Silverado, Tahoe, or other GM vehicle suffering from frustrating issues like a persistent Check Engine Light, poor shifting, or a no-start condition? A failing Powertrain Control Module (PCM) is often the culprit, leaving you stranded and stressed. This is the definitive solution to get your vehicle back on the road with confidence. This unit, part number 12586242, is professionally programmed with the latest GM software updates specifically for your vehicle’s VIN, ensuring a seamless and effective repair.
Common Symptoms of a Failing 2004 GM PCM & Your Solution
If you’re experiencing any of the following, a faulty engine computer is the likely cause. This pre-programmed module is designed to resolve these problems directly:
- Persistent Check Engine Light (CEL)
- Diagnostic Trouble Codes (DTCs) like P0601, P0602, or P0606
- Engine cranks but will not start
- Harsh or erratic automatic transmission shifting
- Reduced fuel economy
- Stalling, hesitation, or rough idling
- Communication errors with diagnostic scan tools
Don’t let a bad computer keep your truck down. By ordering this Programmed 2004 GM PCM 12586242, you’re not just buying a part; you’re getting a reliable, plug-and-play fix that restores your vehicle’s brain to perfect working order.
Features & Benefits
- ✔ VIN-Specific Programming: We flash the module with your vehicle’s exact VIN and the newest GM-certified calibrations. This eliminates compatibility issues and ensures optimal performance right out of the box.
- ✔ Plug-and-Play Installation: Because the unit arrives programmed, it simplifies the installation process, getting you back on the road faster. In most cases, a security relearn procedure is all that’s needed.
- ✔ Restored Factory Performance: With the latest software, you’ll regain the smooth shifting, fuel efficiency, and engine response you expect from your vehicle.
- ✔ Wide Compatibility: This computer is a direct replacement for multiple service numbers, including 12586242, 19299226, 89017738, YFKD, YFKF, YFKH, YFKJ, YFKX, YFXL, YFXM, YFXN, YFXP, and YHTN.
- ✔ Peace of Mind: This unit is backed by our one-year replacement warranty.
An Expert’s Note on Programming
In my 20 years of diagnostics, I’ve seen countless vehicle owners chase expensive, unnecessary repairs when the root cause was a poorly programmed or incorrect computer. A generic, non-programmed module from a parts store can cause more headaches than it solves—from transmission damage to immobilizer problems. That’s why VIN-specific programming isn’t just a feature; it’s the most critical step for a successful and lasting repair. We handle this for you, ensuring the computer communicates perfectly with every other module in your truck, just as the factory intended.
To ensure a perfect match, please provide your vehicle’s 17-digit VIN in the notes section during checkout or send it to us in a message after your purchase. We cannot ship your part until we have this information. Get the right part, programmed correctly, with this Programmed 2004 GM PCM 12586242 and drive with renewed confidence.
Frequently Asked Questions
Do I need to do anything after I install this PCM?
In most cases, you will need to perform a simple security relearn procedure, which can typically be done without special tools and takes about 30 minutes. This allows the new PCM to recognize your vehicle’s anti-theft system and keys. Instructions are readily available online for your specific model. Some vehicles may also require a Crankshaft Position Sensor (CASE) relearn, which requires a capable scan tool.
How do I provide my VIN number?
You can add your 17-digit Vehicle Identification Number (VIN) to the ‘notes’ or ‘message to seller’ field during the checkout process. If you forget, you can also send it to us via direct message after completing your purchase. We will not ship the computer until we receive and validate your VIN.
How can I be sure this is the correct part for my truck?
This PCM is compatible with a wide range of 2004 GM trucks and SUVs that use service number 12586242 or any of the other numbers listed in the description. The best way to confirm is to match the service number on your original computer. Providing us with your VIN allows us to double-check and ensure we program it with the correct software for your exact vehicle configuration.
What does “programmed” actually mean?
Programming, or ‘flashing’, involves loading the computer with the specific operational software for your vehicle’s make, model, engine, transmission, and options. We use your VIN to access the latest official GM software, ensuring the PCM operates your vehicle exactly as the manufacturer intended for optimal performance, emissions, and reliability.
What is the warranty on this computer?
This unit is backed by our one-year replacement warranty. This covers any defects in the module itself. Please contact us for any assistance or to initiate a warranty claim.