Get Your Truck Back in Action, Fast.
Is your 2004 Silverado, Sierra, or GM SUV suffering from perplexing issues like a persistent check engine light, erratic transmission shifting, a no-start condition, or sudden stalling? These are classic symptoms of a failing Powertrain Control Module (PCM). Don’t let a faulty computer keep your vehicle sidelined. This genuine GM engine computer is the definitive solution to restore your vehicle’s performance, reliability, and drivability, getting you back on the road with confidence.
Common Symptoms & Your Solution
A failing PCM can wreak havoc on your vehicle’s systems. You might be experiencing one or more of the following problems:
- Check Engine Light (CEL) Illumination: Often with communication-related Diagnostic Trouble Codes (DTCs) like U0100.
- Poor Engine Performance: Reduced power, rough idling, poor fuel economy, and hesitation.
- Transmission Issues: Harsh or delayed shifting, or getting stuck in one gear.
- Intermittent or No-Start Conditions: The engine cranks but won’t start, or starts unreliably.
- Network Communication Failures: Your mechanic’s scan tool cannot communicate with the computer.
This programmed 12586242 PCM is the direct answer to these problems. We take the guesswork and hassle out of the repair by flashing the unit with the latest GM-approved software updates, specifically matched to your vehicle’s unique Vehicle Identification Number (VIN). It arrives ready to install, saving you a costly and time-consuming trip to the dealership.
Features & Tangible Benefits
- ✔ VIN-Specific Programming Included: Your computer arrives ready for installation. No extra fees or trips to the dealer for flashing are required.
- ✔ Flashed with Latest GM Software: We ensure your module has the most current software, correcting factory bugs and optimizing engine and transmission performance.
- ✔ Plug-and-Play Installation: Simply disconnect the battery, swap the modules, and reconnect. You’ll be back up and running in no time.
- ✔ Guaranteed Compatibility: This unit is a direct replacement for service numbers 12586242, 19299226, 89017738, and many others listed in the fitment guide.
- ✔ Restored Drivability: Enjoy smooth shifting, consistent power delivery, and the reliability you depend on for work or family.
- ✔ This unit is backed by our one-year replacement warranty.
Expert Insight: The Power of Pre-Programming
As a 20-year veteran technician, I can’t stress enough the value of a pre-programmed module. In the past, replacing a PCM meant having the vehicle towed to a dealership for an expensive programming session. Our process eliminates that entire step. By providing your VIN at checkout, you receive a programmed 12586242 PCM that is truly plug-and-play. This not only saves you hundreds of dollars but also days of vehicle downtime. It’s the smartest, most efficient way to handle this critical repair and get your truck back to work.
Your vehicle is a vital tool. Whether you’re hauling equipment to a job site or taking the family on a trip, you need it to be dependable. Installing this professionally programmed 12586242 PCM is the most effective way to solve complex electronic issues and restore the robust performance you expect from your GM truck or SUV.
Frequently Asked Questions
Do I need to get this computer programmed by a dealer?
No. This is the biggest benefit of our service. We program the computer to your vehicle’s specific VIN before we ship it. It arrives ready to be installed.
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 it is required for the programming process.
Where is the PCM located on my 2004 GM vehicle?
For most trucks and full-size SUVs like the Silverado, Sierra, and Tahoe, the PCM is located in the engine bay on the driver’s side, under the battery tray. For mid-size SUVs like the Trailblazer and Envoy, it is typically located next to the air filter box.
My original part has a different service number. Will this still work?
Yes. Part number 12586242 is the base hardware that supersedes and replaces many different service numbers from the factory, including 89017738, 19299226, YFKD, YFKF, YFKH, and many others listed in our fitment data. As long as your vehicle is on the list, this computer will work when programmed to your VIN.
Will I need to perform a security or CASE relearn procedure after installation?
In many cases, the vehicle will start and run perfectly after installation. However, some GM vehicles may require a simple security relearn procedure (which can be done without special tools) or a Crankshaft Variation (CASE) relearn (which requires a scan tool) to clear a remaining check engine light for code P1336. The core engine and transmission programming is already complete.