Get Your Van Back on the Road and Back to Work
Is your 2003 Chevy Express 3500 letting you down? When the Powertrain Control Module (PCM) starts to fail, it can bring your work to a grinding halt with problems like stalling, harsh shifting, or a frustrating no-start condition. This isn’t just an inconvenience; it’s lost time and lost income. We understand that you need a reliable, straightforward solution to get your vehicle running properly again. This is the dependable, direct-fit replacement you need to restore your van’s performance and your peace of mind.
Common Symptoms & Your Solution
If you’re experiencing any of the following issues, a failing computer is the likely culprit. This module is the definitive solution for:
- Intermittent or complete no-start conditions
- Unexplained engine stalling or cutting out while driving
- Poor fuel economy and reduced engine power
- Erratic or harsh automatic transmission shifting
- Check Engine Light (CEL) with communication-related Diagnostic Trouble Codes (DTCs) such as P0601, P0602, or P0606
- Other modules on the vehicle not communicating with the PCM
By installing our Programmed 2003 Express 3500 PCM, you are not just replacing a part; you are providing a stable, correctly calibrated brain for your vehicle’s engine and transmission, solving these issues at their source.
Features & Benefits
- ✔ Ready to Install: This module arrives at your door fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). No extra trips to the dealer for expensive programming.
- ✔ Updated Software: We flash each unit with the latest GM-released software updates, ensuring optimal performance, fuel efficiency, and emissions control.
- ✔ Guaranteed Compatibility: This unit is a direct replacement for a wide range of service numbers, including 12581565, 12576106, 89017733, and 88864822, ensuring a perfect match for your vehicle.
- ✔ Cost-Effective Repair: Save hundreds of dollars compared to sourcing and programming a new module from a dealership. This is a smart, budget-conscious solution for a critical repair.
- ✔ Reliable Performance: Each module is thoroughly inspected and tested to meet or exceed original equipment specifications for dependable, long-term operation.
- ✔ Protected Purchase: This unit is backed by our one-year replacement warranty.
An Expert’s Note on VIN Programming
For these early 2000s GM vehicles, the VIN programming is absolutely critical. It’s not just about engine parameters; it’s about security. The PCM is tied into the vehicle’s anti-theft system (Passlock/VATS). A non-programmed module from a junkyard simply won’t start the engine. By providing us your VIN, we handle this complex security handshake for you. This means when you receive your Programmed 2003 Express 3500 PCM, you can typically install it, perform a simple security relearn procedure (if needed), and get back on the road without specialized scan tools.
Frequently Asked Questions
Do I need to do any programming myself?
No. This PCM comes fully flashed and programmed to the VIN you provide. In most cases, it is a plug-and-play installation, though some vehicles may require a simple, key-on/key-off security relearn procedure that you can do yourself in your driveway. We provide instructions for this.
Where do I provide my vehicle’s VIN?
After you complete your purchase, you will need to send us your 17-digit VIN. We will follow up with an email to ensure we get the correct information from you before we program and ship your part.
Will this fix my specific problem?
This module will correct any issues directly caused by a failing PCM. While it solves the vast majority of the symptoms listed above, it’s always essential to have a proper diagnosis to ensure you’re not replacing a good part. This Programmed 2003 Express 3500 PCM is the solution when the computer itself is confirmed to be the point of failure.
Is this a brand new part?
This is a high-quality, fully tested replacement component that has been meticulously inspected and prepared to provide reliable service. It is programmed with the newest software updates from GM to ensure it performs correctly.
What if my original part number isn’t an exact match to 88864822?
That’s okay. This PCM is compatible with and replaces a long list of original GM service numbers, including 12581565, 12570557, 12576106, and many others listed in the compatibility chart. As long as your vehicle is on the list, this module will work perfectly once programmed to your VIN.
What is the warranty on this PCM?
This unit is backed by our one-year replacement warranty. We stand by the quality of our parts and programming to give you confidence in your repair.