Get Your Van Back on the Job, Fast.
Is your 2004 Chevy Express 2500 letting you down? When your work van is stalling, shifting erratically, or refusing to start, you’re not just losing transportation—you’re losing time and money. A faulty Powertrain Control Module (PCM) is often the hidden culprit behind these frustrating and costly issues. This isn’t just a part; it’s the solution to getting your reliable workhorse back in service. We provide a professionally programmed PCM, flashed with the latest GM software updates specifically for your vehicle’s VIN, ensuring a seamless and effective repair for your 2004 Chevy Express 2500 PCM replacement.
Common Symptoms & Your Solution
If your vehicle’s computer is failing, you’ll likely experience one or more of the following issues. This module is the definitive solution for correcting problems such as:
- Persistent Check Engine Light (CEL)
- Diagnostic Trouble Codes (DTCs) related to internal module failure (e.g., P0601, P0606)
- Vehicle won’t start or has a hard starting condition
- Poor fuel economy and engine performance
- Erratic or harsh transmission shifting
- Communication errors with diagnostic scan tools
Ordering this module is the most direct path to resolving these issues. We take the guesswork out of the repair by programming the unit for you, eliminating the need for an expensive trip to the dealership.
Features & Benefits
- ✔ VIN-Programmed for Your Van: Arrives ready for installation, specifically flashed to your vehicle’s VIN. No extra programming required.
- ✔ Latest GM Software: We load the newest factory updates to ensure optimal engine performance, fuel efficiency, and transmission shifting.
- ✔ Direct-Fit Solution: Engineered to be a precise replacement for OEM part numbers 12586243 and 89017739, guaranteeing compatibility.
- ✔ Restores Peak Performance: Corrects complex electronic issues, restoring the power, reliability, and drivability you depend on.
- ✔ Peace of Mind: This unit is backed by our one-year replacement warranty.
Expert Insight: The Power of Proper Programming
As a technician with over 20 years of experience, I’ve seen countless repairs complicated by improperly programmed modules. A PCM isn’t a simple ‘plug-and-play’ part from the factory; it needs to be coded with your vehicle’s unique VIN to communicate with the security system, transmission, and other critical components. Our process ensures this critical step is done correctly before it ships. This saves you from the headache of a ‘no-start’ condition after installation or the added expense of having the vehicle towed to a dealer for programming. Getting a pre-flashed 2004 Chevy Express 2500 PCM replacement is the smartest way to ensure a successful, one-time repair.
Complete Fitment List
While this is the ideal 2004 Chevy Express 2500 PCM replacement, this versatile module also fits a wide range of other 2004 GM vehicles. Please verify your part number (12586243 or 89017739) for a perfect match. Compatible models include various configurations of the Avalanche 2500, S10, Envoy, Savana, Rainier, Sierra, SSR, Yukon XL, GTO, Trailblazer, Astro, Blazer, Corvette, Suburban, CTS, and Silverado.
Frequently Asked Questions
Do I need to do any programming after I receive this part?
No. We program the module to the VIN you provide before shipping. In most cases, it is ready for installation right out of the box. Some vehicles may require a simple security relearn procedure, which can be done without special tools and instructions are readily available online.
Where do I find my VIN?
Your 17-digit Vehicle Identification Number (VIN) can be found on your vehicle’s registration, insurance card, or on a placard on the driver’s side dashboard visible through the windshield.
Is this a difficult part to install?
The physical installation is typically straightforward for someone with basic mechanical skills. The module is usually located in the engine compartment and held in by a few bolts and electrical connectors. Always disconnect the battery before starting the installation.
My original part number is 89017739. Will this work?
Yes, this module is a direct, compatible replacement for both OEM part numbers 12586243 and 89017739. We will ensure the programming is correct for your specific vehicle.
What information do you need from me after I order?
After you complete your purchase, you will need to send us your vehicle’s 17-digit VIN. We cannot program and ship your module without this information.
What does the warranty cover?
This unit is backed by our one-year replacement warranty, which covers the part against defects in materials and workmanship for one year from the date of purchase.