Is Your GM Truck or SUV Acting Up? Get It Running Right.
There’s nothing more frustrating than a vehicle you can’t rely on. If your 2004 GM truck or SUV is suffering from a persistent check engine light, erratic performance, or a no-start condition, a failing Powertrain Control Module (PCM) is often the culprit. This isn’t just an inconvenience; it affects your vehicle’s fuel economy, power, and overall safety. It’s time to stop guessing and install a solution that works. This is a genuine, VIN-programmed replacement PCM that restores your vehicle’s brain to perfect working order.
Common Symptoms & Your Solution
A faulty PCM can manifest in numerous ways, leaving you stranded and costing you money at the pump. If you’re experiencing any of the following, our pre-programmed module is the definitive fix:
- Persistent Check Engine Light (CEL)
- Diagnostic Trouble Codes (DTCs) like P0601, P0602, P0606, or U-series communication codes
- Rough or unstable idling
- Engine stalling or cutting out unexpectedly
- Noticeable decrease in fuel efficiency
- Failure to pass an emissions test
- Harsh or incorrect shifting patterns
- Complete no-start condition where the engine cranks but won’t fire
This Programmed 2004 GM PCM 12586242 is the reliable, straightforward solution to these complex electronic issues, getting you back on the road with confidence.
Features & Benefits
- ✔ Plug & Play Installation: We flash the module with your vehicle’s unique VIN and the latest GM software updates before it ships. This eliminates the need for expensive dealership programming.
- ✔ Restored Performance & Efficiency: A properly functioning PCM ensures your engine receives the correct signals for optimal fuel delivery, ignition timing, and transmission control, restoring lost power and MPG.
- ✔ Guaranteed Compatibility: This unit is a direct replacement for service number 12586242 and a wide range of other service numbers (listed below), ensuring a perfect fit and function for your 2004 GM vehicle.
- ✔ Solve Annoying Electrical Gremlins: Put an end to confusing diagnostic codes and unpredictable engine behavior caused by a failing original computer.
- ✔ Purchase with Confidence: This unit is backed by our one-year replacement warranty.
An Expert’s Note on VIN Programming
As a technician with over two decades of experience, I’ve seen countless vehicle owners try to save a few dollars by pulling a computer from a salvage yard. The problem? That computer is programmed for a different vehicle. It won’t have the right software for your specific engine, transmission, and options package. This leads to immediate check engine lights, poor performance, or even a vehicle that won’t start at all. Our process of programming this Programmed 2004 GM PCM 12586242 to your specific VIN is the most critical step. It ensures the computer communicates seamlessly with all other modules in your vehicle, just as it did from the factory.
Frequently Asked Questions
What is a PCM and what does it do?
The Powertrain Control Module (PCM), often called the Engine Control Unit (ECU), is the central computer of your vehicle. It controls all aspects of the engine and transmission to ensure optimal performance, fuel economy, and emissions.
Is this a difficult part to install?
On most 2004 GM trucks and SUVs, the PCM is located in the engine bay and is relatively easy to access. Installation typically involves disconnecting the battery, unplugging the electrical connectors from the old unit, unbolting it, and then installing the new one in the reverse order. Because we program it for you, no further electronic work is required.
How do I provide my VIN number?
After you complete your purchase, simply send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot ship your part until we receive this information, as the programming is essential for it to function in your vehicle.
Do I need to have a security relearn procedure done after installation?
In many cases with this generation of GM vehicles, a security relearn (also known as a CASE relearn) may be necessary for the vehicle to start and run correctly. This is a simple procedure that can typically be done without special tools and involves a sequence of turning the key. We can provide instructions upon request.
My original part has a different service number. Will this still work?
Yes. This module is a direct replacement for service numbers 12586242, 19299226, 89017738, YFKD, YFKF, YFKH, YFKJ, YFKX, YFXL, YFXM, YFXN, YFXP, and YHTN. As long as your vehicle is on the compatibility list, this Programmed 2004 GM PCM 12586242 will function correctly once programmed to your VIN.