Restore Your GM Truck’s Peak Performance
Is your 2004 Sierra, Silverado, Yukon, or other GM workhorse suffering from frustrating engine problems? A faulty Powertrain Control Module (PCM) can lead to rough idling, poor fuel economy, erratic shifting, or even a no-start condition, leaving you stranded and unproductive. This direct-fit PCM, service number 12586242, is the definitive solution to get your truck or SUV back on the road, running with the reliability and power you depend on.
Common Symptoms & Your Solution
If you’re experiencing any of the issues below, a failing engine computer is the likely culprit. This pre-programmed unit is designed to resolve these problems and restore factory operation.
- Check Engine Light (CEL) with various trouble codes (DTCs)
- Engine stalling, stumbling, or misfiring
- Harsh or incorrect automatic transmission shifting
- Complete no-start or intermittent starting issues
- Communication errors with diagnostic scan tools
- Reduced power and poor throttle response
Features & Tangible Benefits
- โ VIN-Specific Programming: We flash this module with your vehicle’s exact VIN and the latest GM-approved software updates, ensuring perfect communication between all onboard systems.
- โ Plug-and-Drive Installation: Arrives ready to install, eliminating the need for an expensive trip to the dealership for programming.
- โ Guaranteed Compatibility: A direct replacement for service numbers 12586242, 19299226, 89017738 and a wide range of broadcast codes, ensuring a perfect match for your vehicle.
- โ Restored Drivability: Corrects common engine and transmission issues, bringing back the smooth, dependable performance you expect from your vehicle.
- โ Peace of Mind Protection: This unit is backed by our one-year replacement warranty.
Expert Insight: Why VIN Programming is Non-Negotiable
As a technician, I’ve seen countless issues arise from using generic, non-programmed modules in these 2004 GM trucks and SUVs. These vehicles have complex systems that need to communicate seamlesslyโfrom the engine and transmission to the ABS and anti-theft systems. Flashing the PCM with your specific VIN isn’t just about making the engine run; it’s about loading the precise digital blueprint for your vehicle’s unique options and calibrations. This step ensures your transmission shifts at the right points, your gauges read accurately, and all components work in harmony, just as the factory intended. Skipping this critical step is a recipe for persistent problems and future headaches.
Frequently Asked Questions
What information do I need to provide?
After you place your order, we will need the 17-digit Vehicle Identification Number (VIN) from your truck or SUV. This is essential for us to program the module correctly before shipping.
Do I need to have this programmed by a dealer?
No. This PCM arrives pre-programmed and ready for installation. This saves you the time, cost, and hassle of a dealership visit.
Will I need to perform a security relearn procedure?
In many cases, yes. Most GM vehicles of this era require a simple security relearn procedure (often called a CASE relearn or Passlock relearn) after the PCM is replaced. This can typically be done in your driveway without special tools and involves a sequence of key turns. Instructions are widely available online for your specific model.
How do I confirm this is the right part for my vehicle?
The best way is to match the service number on your current PCM. This unit replaces service number 12586242 and many others listed in the description. If your vehicleโlike a 2004 Silverado, Tahoe, Escalade, or Hummer H2โis listed, and you match the service number, you can be confident in your purchase.
What kind of warranty is included?
This unit is backed by our one-year replacement warranty, giving you confidence in your repair.