Programmed 2004 Silverado PCM 12586242 Engine Control Module

Restore Your Truck’s Power and Reliability!

Get a fully programmed 12586242 engine computer for your 2004 GM truck or SUV. We flash it to your VIN for a plug-and-play solution to fix running issues, poor shifting, and clear that check engine light. Order now for a reliable, direct-fit replacement!

$119.95

+11.99 USPS Priority Shipping

Availability: In stock



Guaranteed Safe Checkout

Restore Peak Performance to Your 2004 GM Truck or SUV

Is your 2004 Silverado, Sierra, Tahoe, or other GM vehicle suffering from frustrating issues like a persistent check engine light, poor engine performance, erratic shifting, or a no-start condition? These are classic symptoms of a failing Powertrain Control Module (PCM), the central computer that manages your engine and transmission. Don’t let a faulty module keep your reliable truck off the road. This direct-fit PCM, part number 12586242, is the definitive solution to get your vehicle running like new again.

This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take the guesswork and expensive dealership trips out of the equation. Upon purchase, simply provide us with your vehicle’s VIN. Our certified technicians will then flash the module with the latest, most up-to-date GM factory software specific to your exact vehicle configuration. This ensures perfect compatibility and optimal performance right out of the box.

From the Diagnostic Bay

We had a 2004 Yukon Denali come into the shop with a stubborn P0300 random misfire code that the owner had been chasing for months. He had replaced plugs, wires, coils, and even the fuel pump, all to no avail. A quick scan with our professional tools showed no communication with the PCM. After confirming power and ground to the module were good, we identified the internal failure. We installed one of our pre-programmed 12586242 modules, performed a quick security relearn, and the engine fired up and idled perfectly. The customer was thrilled to finally have his truck back, running smoothly after months of frustration and wasted money on other parts.

Common Symptoms of a Failing 2004 Silverado PCM

If your vehicle is experiencing any of the following issues, a faulty engine computer is a likely culprit. Replacing your old module with this pre-programmed unit can resolve these problems and restore your vehicle’s reliability and drivability.

  • ✔ Persistent Check Engine Light (CEL) that won’t clear
  • ✔ Engine stalling, stuttering, or misfiring
  • ✔ Noticeable decrease in fuel economy
  • ✔ Harsh, erratic, or delayed automatic transmission shifting
  • ✔ Complete no-start condition where the engine cranks but won’t ignite
  • ✔ Failure to communicate with OBD-II scan tools
  • ✔ Unexplained warning lights on the dashboard

Guaranteed Compatibility and Simple Installation

This PCM is a direct replacement for service number 12586242 and is also compatible with a wide range of other service numbers, including 19299226, 89017738, YFKD, YFKF, YFKH, YFKJ, YFKX, YFXL, YFXM, YFXN, YFXP, and YHTN. It is designed to fit a vast array of 2004 GM models, such as:

  • Chevrolet Silverado & GMC Sierra (1500, 2500, 3500)
  • Chevrolet Tahoe, Suburban & GMC Yukon, Yukon XL
  • Chevrolet Avalanche
  • Cadillac Escalade (Base, ESV, EXT)
  • Chevrolet SSR & Trailblazer EXT
  • GMC Envoy (XL, XUV) & Buick Rainier
  • Hummer H2 & Isuzu Ascender

Installation is straightforward for a DIY mechanic. On most trucks (Silverado, Sierra, Suburban), the PCM is located under the hood on the driver’s side, beneath the battery tray. On SUVs (Trailblazer, Envoy), it’s typically mounted next to the air filter housing. Once installed, you may need to perform a simple security relearn procedure (often called a CASE relearn), which can be done without special tools and takes about 30 minutes. This syncs the new computer with your vehicle’s anti-theft system.

Frequently Asked Questions

Do I need to do any programming myself?

No. This PCM comes fully programmed to your vehicle’s specific VIN. We handle all the flashing with the latest GM software before it ships. It is ready for installation upon arrival.

Where do I provide my vehicle’s VIN?

You can provide your 17-digit Vehicle Identification Number (VIN) during the checkout process or by sending us a message after your purchase. We cannot ship the module until we have your VIN to ensure correct programming.

What is a CASE Relearn and is it required?

A Crankshaft Variation Relearn (CASE Relearn) synchronizes the new PCM with your engine’s crankshaft position sensor. While not always required for the vehicle to run, it is highly recommended to prevent a potential check engine light (P1336) and ensure accurate misfire detection. Many high-end consumer scan tools can perform this function, or a local mechanic can do it quickly.

Is this a used part?

This is a high-quality, inspected, and tested OEM part that has been professionally programmed for your specific vehicle. It provides the same reliability and function as a new dealership part without the excessive cost.

Will this fix my transmission shifting problems?

In many cases, yes. The PCM controls both the engine and the transmission. If your shifting issues are caused by faulty electronic signals or logic from the computer, this replacement module will resolve them. However, it will not fix internal mechanical failures within the transmission itself.

Condition

Refurbished

Year

Genuine OEM

Yes

MPN

YHTN

Interchange part number

Model

Silverado 2500

Year

2004

Brand

GM

Manufacturer Part Number

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superseded part number

12586242 19299226 89017738 YFKD, YFKF YFKH YFKJ YFKX YFXL, YFXM YFXN YFXP YHTN

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