Get Your Workhorse Running Right Again
Is your 2004 Chevy Avalanche 2500, Sierra, or Express van feeling sluggish, stalling, or throwing confusing check engine lights? A failing Powertrain Control Module (PCM), the vehicle’s central computer, is often the culprit behind these frustrating and costly issues. Don’t let a faulty computer keep your reliable truck or van sidelined. This replacement PCM is the definitive solution, arriving at your door fully programmed to your vehicle’s specific VIN, ensuring a smooth installation and restoring the dependable performance you rely on every day.
Common Symptoms & Your Solution
A failing PCM can cause a wide range of problems that can be difficult to diagnose. If you’re experiencing any of the following, it’s a strong indicator that your engine computer needs replacement:
- Persistent Check Engine Light (CEL) for codes like P0601, P0602, or P0606
- Engine stalling, stumbling, or rough idling
- Poor fuel economy
- Harsh or erratic transmission shifting
- Complete no-start condition where the engine cranks but won’t fire
- Communication errors with diagnostic scan tools
This module is the answer. By providing a professionally programmed 2004 Avalanche 2500 PCM, we eliminate the need for expensive dealership programming or complex diagnostic tools. It’s designed to get you back on the road with confidence.
Features & Benefits
- âś” VIN-Programmed for Your Vehicle: We flash the module with your truck’s specific VIN and the latest GM software updates, ensuring it works seamlessly right out of the box.
- âś” Restores Factory Performance: Get back the smooth power delivery, crisp shifting, and optimal fuel efficiency your vehicle had when it was new.
- âś” Direct-Fit Replacement: Engineered to be a perfect replacement for part numbers 89017739 and 12586243, guaranteeing a hassle-free installation.
- ✔ Plug-and-Play Installation: Once installed, you simply need to perform the standard security relearn procedure—a simple process that takes about 30 minutes and requires no special tools.
- âś” This unit is backed by our one-year replacement warranty.: Drive with confidence knowing your purchase is protected.
An Expert’s Note on Programming
As a technician, I’ve seen countless vehicle owners buy a used computer from a salvage yard, only to find it’s a useless metal box. These modules are not interchangeable. They contain specific software and security information tied to the original vehicle. Our process of programming this programmed 2004 Avalanche 2500 PCM to your VIN isn’t just a convenience—it’s the critical step that makes the repair possible. We ensure the module communicates correctly with every other system in your truck, from the ignition to the transmission, saving you from a world of diagnostic headaches.
Frequently Asked Questions
Do I need to do any programming after I install it?
No programming is required. The module arrives fully flashed to your VIN. You will, however, need to perform a standard security relearn procedure (also known as a CASE relearn) which pairs the new PCM to your vehicle’s anti-theft system. This process typically involves turning the key on and off in a specific sequence and takes about 30-40 minutes. Instructions are readily available online for your specific model.
Where do I provide my vehicle’s VIN?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We cannot ship your part until we receive this information, as it is essential for programming the module correctly for your specific vehicle.
Is this a brand new part?
This is a high-quality, tested, and guaranteed replacement part that has been meticulously inspected and prepared to meet or exceed original equipment standards. It is programmed with the newest software available from GM for your vehicle.
How can I be sure my PCM is the problem?
The symptoms listed above are strong indicators of a failing PCM. Common diagnostic trouble codes like P0601 (Internal Control Module Memory Check Sum Error) are a definitive sign. However, we always recommend a thorough diagnosis by a qualified mechanic to rule out other potential issues like wiring or sensor faults before ordering a programmed 2004 Avalanche 2500 PCM.
Will this fix my erratic transmission shifting?
In many cases, yes. The PCM controls transmission line pressure, shift points, and torque converter lockup. If the module is failing, it can directly cause poor shifting performance. Replacing a faulty PCM often resolves these types of transmission-related symptoms.
What is the warranty on this part?
This unit is backed by our one-year replacement warranty. This gives you confidence and peace of mind in your repair.