Is Your Truck or SUV Running Rough?
A failing Powertrain Control Module (PCM) in your 2004 GM vehicle can be the source of countless headaches, from a persistent Check Engine Light to frustrating no-start conditions. If you’re experiencing erratic engine behavior, poor fuel economy, or shifting problems, the brain of your vehicle may be the culprit. Don’t let a faulty computer keep you off the road. This is the reliable, straightforward solution to restore your vehicle’s performance and get you back behind the wheel with confidence.
Common Symptoms of a Failing PCM & Your Direct-Fit Solution
A bad engine computer can manifest in various ways. You might be dealing with diagnostic trouble codes (DTCs) like P0601 (Internal Control Module Memory Check Sum Error) or P0606 (ECM/PCM Processor Fault), or more general symptoms such as:
- Engine stalling or misfiring
- Harsh or unpredictable transmission shifting
- Failure to communicate with a diagnostic scan tool
- Reduced engine power and acceleration
- Vehicle won’t start, even with a good battery and starter
This replacement 12586242 PCM is the definitive fix for these issues. We take the guesswork and complexity out of the repair by pre-programming the unit to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This ensures it communicates perfectly with your vehicle’s existing systems right out of the box.
Features & Benefits
- โ VIN-Programmed for Your Vehicle: Arrives ready to install, flashed with the latest GM software updates for your specific truck or SUV. No expensive trip to the dealer needed for programming.
- โ Restores Peak Performance: Corrects engine and transmission control issues, restoring the smooth operation, fuel efficiency, and power you expect.
- โ Guaranteed Compatibility: This unit is a direct replacement for service numbers 12586242, 19299226, 89017738, and many others, ensuring a perfect fit and function for the models listed.
- โ Plug & Play Installation: Once the simple security relearn procedure is performed (if required), your vehicle is ready to go. We’ve handled the complicated programming for you.
- โ One-Year Protection: This unit is backed by our one-year replacement warranty, giving you confidence in your repair.
An Expert’s Note on VIN Programming
“In my 20 years of diagnostics, I’ve seen countless people buy a used computer online only to find it won’t work because it’s not programmed. For these 2004 GM vehicles, the PCM is the central hub. It controls everything from fuel injectors to the anti-theft system (VATS/Passlock). Programming the 12586242 PCM with your VIN isn’t just a suggestion; it’s essential. It ensures the computer recognizes your specific keys, your transmission type, and all the factory options your vehicle came with. Skipping this step is a recipe for a no-start situation. We handle this critical process for you, so you can be certain the part you receive is the right part, ready to work.”
Frequently Asked Questions
Do I need to do anything after I install the computer?
In most cases, you will need to perform a simple security relearn procedure, also known as a VATS or Passlock relearn. This can typically be done without any special tools and involves a sequence of key turns. This process syncs the new computer with your vehicle’s anti-theft system. We include instructions to guide you through it.
How do I provide my VIN?
After you complete your purchase, simply send us a message with your 17-digit VIN. We cannot ship your part until we receive this information, as the programming is specific to your vehicle.
Where can I find the service number on my original PCM?
The service number is typically found on a white or silver sticker on the PCM itself. For most trucks and full-size SUVs like the Silverado or Tahoe, the PCM is located under the hood on the driver’s side, near the battery. For mid-size SUVs like the Trailblazer or Envoy, it’s often next to the air filter box.
Is this a brand new part?
This is a high-quality, tested replacement part that has been meticulously inspected to ensure it meets or exceeds original equipment standards. It is programmed with the latest software from GM to provide dependable, long-lasting service.
What if my part number isn’t on the list?
Please contact us with your vehicle’s VIN and the part number from your original computer. We can verify compatibility and ensure you receive the correct part for your specific application.