Programmed 2004 GMC Envoy XL 5.3L PCM 12586242 | Direct Fit ECM

Get Back on the Road with Confidence

Tired of check engine lights and poor performance in your 2004 Envoy XL? This engine computer (PCM 12586242) is your solution. We program it to your specific VIN, so it arrives ready to install, restoring your truck’s reliability and your peace of mind. Stop worrying about your vehicle and start driving again. Add to cart now!

$119.95

+11.99 USPS Priority Shipping

Availability: In stock



Guaranteed Safe Checkout

Is Your Truck or SUV Running Rough? Get It Back in Top Form.

There’s nothing more frustrating than a vehicle you can’t rely on. If your 2004 GMC Envoy XL, Sierra, or other compatible GM vehicle is suffering from a persistent check engine light, erratic shifting, poor fuel economy, or a dreaded no-start condition, a failing Powertrain Control Module (PCM) is often the culprit. This isn’t just an inconvenience; it’s the brain of your vehicle, and when it falters, everything from performance to safety is compromised. This replacement PCM is the definitive solution to restore your vehicle’s performance and your confidence on the road.

Common Symptoms of a Failing PCM & Your Solution

A faulty engine computer can manifest in numerous ways. You might be experiencing one or more of the following issues:

  • Check Engine Light (CEL) with communication-related Diagnostic Trouble Codes (DTCs) like U0100.
  • Engine Performance Problems: Stalling, rough idling, misfires, or a noticeable loss of power.
  • Transmission Issues: Harsh or delayed shifting, or getting stuck in one gear.
  • No-Start Condition: The engine cranks but refuses to start, even with a good battery and starter.
  • Reduced Fuel Economy: A sudden and unexplained drop in your vehicle’s MPG.

This module is the direct, reliable fix for these problems. We take the guesswork out of the repair by programming the unit specifically for your vehicle using the VIN you provide, ensuring it works correctly right out of the box.

Features & Benefits

  • ✔ Arrives Ready to Install: We flash this module with the latest GM software updates using your vehicle’s unique VIN. This critical step saves you a trip to the dealership and avoids costly programming fees.
  • ✔ Restores Original Performance: By precisely managing engine and transmission parameters, this computer brings back the smooth, reliable operation you depend on.
  • ✔ Guaranteed Compatibility: This unit is a direct replacement for service numbers 12586242, 19299226, 89017738, YFKD, YFKF, YFKH, YFKJ, YFKX, YFXL, YFXM, YFXN, YFXP, and YHTN, ensuring a perfect fit and function for a wide range of 2004 GM trucks and SUVs.
  • ✔ One-Year Replacement Warranty: This unit is backed by our one-year replacement warranty, giving you complete peace of mind with your purchase.

Expert Insight: Why VIN Programming is Non-Negotiable

As a technician, I’ve seen countless vehicle owners buy a used computer online only to find it won’t work. That’s because a PCM isn’t a simple one-size-fits-all part. It’s programmed to manage specific options for the original vehicle it came from—things like engine size, transmission type, gear ratios, and anti-theft systems (Passlock/VATS). Our mandatory VIN programming service isn’t an upsell; it’s the essential process that makes the part truly compatible with your truck. It ensures all systems communicate correctly, preventing a cascade of new error codes and getting you back on the road without the headache.

Frequently Asked Questions

Will I need to do any programming after installation?

While we handle the main programming to your VIN, you will need to perform a security relearn procedure after installation. This simple process syncs the new PCM with your vehicle’s anti-theft system and can typically be done in your driveway with just the key. Instructions are readily available online for your specific model, and it usually takes about 30 minutes.

How do I provide my VIN?

After you complete your purchase, simply send us a message with your 17-digit Vehicle Identification Number (VIN). We cannot ship your part until we receive this information, as it is required for the programming process.

Is this a “plug-and-play” part?

It’s as close as it gets. Because we pre-program it, you avoid a trip to the dealer. You simply install the unit, perform the security relearn, and you’re ready to go. This saves significant time and money compared to installing a blank module.

How can I be sure my old PCM is the problem?

While the symptoms listed above are strong indicators, it’s always best to have a qualified mechanic perform a full diagnostic. This includes checking wiring, grounds, and sensors to rule out other potential causes before replacing the PCM.

Where is this part located on my vehicle?

For most compatible vehicles like the Envoy, Trailblazer, and Rainier, the PCM is located in the engine bay, next to the air filter box. For trucks like the Sierra and Silverado, it’s typically found on the driver’s side, under the battery tray.

Condition

Refurbished

Year

Genuine OEM

Yes

MPN

19299226

Interchange part number

Model

ENVOY XL

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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