Is Your GM Truck or Van Running Poorly?
The Powertrain Control Module, or PCM, is the central computer of your vehicle, managing everything from fuel injection and ignition timing to transmission shifting and emissions control. When it begins to fail, it can cause a wide range of frustrating and difficult-to-diagnose issues. If you’re dealing with a persistent check engine light, poor performance, or a no-start condition, a failing PCM could be the culprit. This replacement module is the definitive solution to restore your vehicle’s factory performance and reliability.
Expert Pro Tip
Before installing your new PCM, it’s critical to verify that all battery connections, main power feeds, and ground connections to the engine and chassis are clean, tight, and free of corrosion. A poor ground is one of the most common causes of original PCM failure and can quickly damage the replacement unit if not corrected.
Symptoms of a Failing Powertrain Control Module
- ✔ Persistent Check Engine Light (CEL) with various or inconsistent trouble codes.
- ✔ Engine stalling, stumbling, or hesitating during acceleration.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Engine cranks but refuses to start (no-start condition).
- ✔ Communication errors when using a diagnostic scan tool.
- ✔ Misfire codes that don’t resolve with new spark plugs or coils.
The Plug-and-Play Solution for Your 2003 Savana 3500 PCM
Getting your vehicle back on the road shouldn’t be complicated. That’s why this Powertrain Control Module comes pre-programmed specifically for your vehicle. Simply provide us with your Vehicle Identification Number (VIN) during checkout, and our technicians will flash the module with the latest, most up-to-date OEM software from General Motors. This ensures perfect compatibility and function right out of the box, eliminating the need for expensive dealership programming. This module is a direct-fit replacement for part number 89017733 and is also compatible with service numbers 12581565, 12570557, 12570558, 12576106, 12576869, 12578127, 88864822, and more.
This unit is a guaranteed fit for a wide range of 2003-2004 GM vehicles, including the GMC Savana, Chevrolet Express, Sierra, Silverado, Yukon XL, Suburban, and others. Please verify the fitment list to ensure compatibility with your specific model and engine configuration.
Frequently Asked Questions
Why do I need to provide my VIN?
Your Vehicle Identification Number (VIN) contains critical information about your vehicle’s specific options, engine, transmission, and emissions equipment. We use the VIN to load the exact factory software and calibrations from GM, ensuring the module works perfectly with your vehicle’s systems upon installation.
Is this part difficult to install?
The physical installation is typically straightforward, involving disconnecting the battery and swapping the old module with the new one. However, some GM vehicles may require a security relearn procedure (often called a Passlock or VATS relearn) to allow the vehicle to start. This procedure can usually be done without special tools and instructions can be found online or in a service manual.
What is a CASE relearn?
A Crankshaft Variation Relearn (CASE relearn) synchronizes the new PCM with the crankshaft position sensor. While many vehicles will run fine without it, performing a CASE relearn with a compatible scan tool is recommended to prevent a P1336 trouble code and ensure optimal engine performance and misfire detection. Most local repair shops can perform this service for you.
Will this fix my check engine light?
If the check engine light is on due to an internal failure of the original PCM, this replacement module will solve the problem. However, if the light is caused by a faulty sensor or another component on the vehicle, that issue will still need to be addressed separately.
Is this a new or used part?
This is a high-quality, inspected, and tested component that has been prepared to provide reliable service. It is programmed with fresh, vehicle-specific software to ensure it functions like a new unit from the factory.