Restore Your GM Truck or SUV’s Performance and Reliability
Is your 2004 GM vehicle running rough, shifting erratically, or showing a persistent Check Engine Light? A failing Powertrain Control Module (PCM) can be the source of countless frustrating and hard-to-diagnose issues. This isn’t just an inconvenience; it affects your vehicle’s reliability, fuel economy, and overall safety. This pre-programmed engine computer is the definitive solution to get your truck or SUV back on the road, running exactly as the factory intended.
Common Symptoms & Your Solution
If you’re experiencing any of the following, a faulty PCM is the likely culprit:
- Persistent Check Engine Light (CEL)
- Diagnostic Trouble Codes (DTCs) like P0601, P0602, P0606, or U-series communication codes
- Poor or erratic automatic transmission shifting
- Reduced fuel economy
- Engine stalling, stumbling, or rough idling
- No-start condition where the engine cranks but won’t fire
This unit is a direct-fit replacement, professionally programmed with the latest official GM software updates. We use your vehicle’s unique VIN to ensure the programming is a perfect match, eliminating the need for expensive dealership visits. This is the most reliable and straightforward way to solve those complex electronic issues and restore your vehicle’s core performance. The 2004 GM 12586242 PCM is your answer to getting the job done right.
Expert Mechanic’s Insight: Before replacing your PCM, always verify your vehicle’s battery is fully charged and the battery terminals are clean and tight. Also, inspect the main engine-to-chassis ground straps for corrosion or damage. A weak power supply or poor ground can mimic PCM failure and cause communication errors. A few minutes of inspection can save you hours of frustration.
Features & Benefits
- โ VIN-Programmed for You: We flash the module with your vehicle’s specific VIN, ensuring 100% compatibility with its systems and options.
- โ Latest GM Updates: Your computer arrives with the most current GM calibration, correcting factory bugs and optimizing performance.
- โ Plug-and-Play Design: Simply install the module and perform the straightforward security relearn procedure. No dealer trip required.
- โ Broad Compatibility: A direct replacement for multiple service numbers including 12586242, 19299226, 89017738, and many more.
- โ Restores Original Function: Cures common issues like harsh shifting, poor fuel mileage, and false sensor codes.
- โ Peace of Mind: This unit is backed by our one-year replacement warranty.
Don’t let a faulty computer keep your reliable GM truck or SUV sidelined. By installing this precisely programmed 2004 GM 12586242 PCM, you’re not just replacing a part; you’re restoring the heart of your vehicle’s operating system and ensuring it performs reliably for years to come. Take control of your repair and get back on the road with confidence. This is the correct solution for your 2004 GM 12586242 PCM replacement needs.
Frequently Asked Questions
Do I need to send my old computer (core) back?
No, there is no core charge or requirement to return your original module. You can keep it or dispose of it as you see fit.
Is this part difficult to install?
Installation is straightforward for anyone with basic mechanical skills. It typically involves disconnecting the battery, unplugging the electrical connectors, and unbolting the old module. After installing the new one, you will need to perform a simple security relearn procedure (often called a ‘key relearn’ or ‘anti-theft relearn’), which can usually be done without special tools. Instructions are widely available online for your specific model.
How do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We cannot program and ship the module without it. Please double-check the VIN for accuracy to ensure a perfect match.
How can I be sure this fits my vehicle?
This module fits a wide range of 2004 GM trucks and SUVs. The best way to confirm is to match the service number on your current computer to one of the numbers listed in the description (e.g., 12586242, YFKD, YFXN). Providing us with your VIN during checkout allows us to perform a final compatibility check before programming.
What if my part number isn’t listed but my vehicle is?
GM uses many different service numbers for the same hardware. If your vehicle model and year are listed, and you have a 5.3L or 6.0L engine as specified, this module is very likely the correct one. Sending us your VIN is the best way to guarantee a perfect match.