Restore Peak Performance to Your GM Truck or SUV
Is your 2004 Sierra, Silverado, Tahoe, or other GM vehicle suffering from frustrating issues like a persistent check engine light, rough idling, stalling, or poor fuel economy? A failing Powertrain Control Module (PCM) is often the culprit, acting as the brain of your engine. This replacement PCM, service number 12586242, is the definitive solution to get your vehicle back on the road, running smoothly and reliably. We take the guesswork and hassle out of the repair by programming the unit specifically to your vehicle’s unique VIN before it ships. This ensures a seamless installation and proper communication with all of your vehicle’s critical systems.
Common Symptoms & Your Solution
If you’re experiencing any of the following, a failing engine computer is the likely cause. This pre-programmed module is designed to resolve these exact problems:
- Erratic or no-start conditions
- Check Engine Light illuminated for codes like P0601, P0602, or P0606
- Poor engine performance and reduced power
- Harsh or incorrect transmission shifting
- Communication errors with diagnostic scan tools
- Noticeable decrease in fuel efficiency
By ordering our VIN-programmed 2004 Sierra 1500 PCM 12586242, you’re not just buying a part; you’re getting a plug-and-play solution engineered to restore your vehicle’s original performance and dependability.
Features & Benefits
- ✔ VIN-Programmed for Your Vehicle: Arrives ready to install with no need for an expensive trip to the dealership for programming.
- ✔ Loaded with Latest GM Updates: We flash the module with the most current GM software to optimize engine efficiency, performance, and emissions.
- ✔ Guaranteed Compatibility: A direct replacement for multiple service numbers including 12586242, 19299226, 89017738, YFKD, YFKF, and more, ensuring a perfect fit.
- ✔ Fully Tested for Reliability: Each unit undergoes rigorous testing to ensure it meets or exceeds OEM standards for performance and durability.
- ✔ Get Back on the Road Fast: This simple solution eliminates complex diagnostics and gets your truck or SUV running right again.
- ✔ This unit is backed by our one-year replacement warranty.
An Expert’s Note on VIN Programming
In a 2004 GM vehicle, the PCM is the central command center. It doesn’t just manage the engine; it communicates constantly with the Transmission Control Module (TCM), the Body Control Module (BCM), and the anti-theft system (VATS/Passlock). Simply swapping a used computer from another vehicle won’t work—it will trigger the anti-theft system and the vehicle won’t start. That’s why our VIN-specific programming is so critical. We ensure the digital “handshake” between all your vehicle’s modules is perfect from the moment you plug it in, saving you from a major headache and a non-running truck.
Frequently Asked Questions
Do I need to do any additional programming after installation?
No. This PCM comes fully programmed to the VIN you provide. In most cases, it is a simple plug-and-play installation. Some vehicles may require a simple security relearn procedure, which involves cycling the key and can be done in your driveway in about 30 minutes without any special tools.
How do I provide my vehicle’s VIN?
Simply enter your 17-digit VIN in the notes section during checkout, or reply to your order confirmation email with it. We cannot ship your part until we have your VIN to program it correctly.
Where is the PCM located on my 2004 GM vehicle?
For most trucks and full-size SUVs (like the Sierra, Silverado, Tahoe, Yukon, Escalade), the PCM is located in the engine bay on the driver’s side, under the battery tray. For mid-size SUVs (like the Trailblazer, Envoy, Rainier), it is typically located next to the air filter box.
Will this fix my check engine light?
This module is a common fix for internal processor failure codes such as P0601, P0606, and other communication-related faults. While it resolves the most frequent causes, we always recommend having your vehicle properly diagnosed to confirm the PCM is the point of failure before ordering your 2004 Sierra 1500 PCM 12586242.
What part numbers is this compatible with?
This unit is a direct replacement for service numbers 12586242, 19299226, 89017738, YFKD, YFKF, YFKH, YFKJ, YFKX, YFXL, YFXM, YFXN, YFXP, and YHTN.