Is Your GM Truck or SUV Experiencing Frustrating Issues?
If your 2004 Sierra, Silverado, Tahoe, or other compatible GM vehicle is suffering from a persistent check engine light, erratic shifting, rough idling, or a no-start condition, a failing Powertrain Control Module (PCM) is often the culprit. As the central computer for your engine and transmission, its proper function is critical. This direct-replacement 2004 GM 12586242 PCM is the definitive, reliable solution to get your vehicle back on the road and running strong.
Common Symptoms & Your Solution
A faulty PCM can cause a wide range of confusing problems. You might be experiencing one or more of the following:
- Check Engine Light (CEL) with various Diagnostic Trouble Codes (DTCs).
- Poor Engine Performance: Including misfires, hesitation, and reduced power.
- Decreased Fuel Economy: The engine isn’t running efficiently.
- Harsh or Failed Shifting: The transmission isn’t receiving the correct signals.
- Communication Errors: Your scanner may not be able to connect to the module (U-codes).
- Vehicle Won’t Start: The PCM may not be activating the fuel pump or ignition systems.
This module is the solution. We flash it with the latest official GM software updates using your vehicle’s specific Vehicle Identification Number (VIN). This ensures it works perfectly with your vehicle’s existing systems right out of the box, eliminating the need for an expensive trip to the dealership for programming.
Features & Benefits
- ✔ VIN-Programmed for Your Vehicle: We flash this module with the latest GM software using your vehicle’s VIN. This ensures 100% compatibility and a seamless installation.
- ✔ Restores Peak Performance: Corrects issues like rough idling, poor acceleration, and erratic transmission shifting by restoring the brain of your engine’s operations.
- ✔ Direct-Fit Replacement: Engineered to be a perfect match for the original unit, ensuring a straightforward installation for service number 12586242 and compatible interchanges like YFKX, YFXL, and YHTN.
- ✔ Solves Check Engine Lights: Addresses a wide range of DTCs related to engine and transmission management, getting you back on the road and through inspection.
- ✔ This unit is backed by our one-year replacement warranty. This provides you with confidence and security in your repair.
Expert Insight: The Key is in the Programming
We had a customer with a 2004 Silverado 2500 who was chasing a persistent ‘No Communication’ issue with his old PCM. After replacing multiple sensors with no luck, he installed our VIN-programmed 2004 GM 12586242 PCM. The truck fired up on the first try, all communication was restored, and the check engine light was finally gone. Don’t waste time and money on guesswork; a correctly programmed PCM is often the root of these complex electrical problems.
Frequently Asked Questions
Do I need to do anything after installing this PCM?
In most cases, you will need to perform a security relearn procedure (also known as a CASE relearn or anti-theft relearn). This is a simple process that can typically be done without special tools and involves a sequence of key turns. Instructions are readily available online for your specific model.
How do I provide my vehicle’s VIN?
After you complete your purchase, you will need to send us your 17-digit VIN. We cannot ship your part until we receive this information, as the programming is specific to your vehicle.
How can I be sure this is the right part for my vehicle?
The best way to ensure compatibility is to match the service number on your current computer to one of the numbers listed: 12586242, 19299226, 89017738, YFKD, YFKF, YFKH, YFKJ, YFKX, YFXL, YFXM, YFXN, YFXP, or YHTN. This part fits a wide range of 2004 GM trucks and SUVs.
Where is the PCM located on my truck or SUV?
Location varies by model. On many trucks like the Sierra and Silverado, it’s found on the driver’s side front fender, under the battery. On SUVs like the Trailblazer and Envoy, it is often located in the engine bay, next to the air filter box.
What does “flashed to my VIN” mean?
“Flashing” is the process of loading the correct software and calibration files onto the computer. By using your VIN, we ensure the 2004 GM 12586242 PCM has the exact programming for your vehicle’s engine, transmission, and options, just as it came from the factory.