Is Your 2003 Chevy Express Van Running Rough?
If you’re dealing with a persistent Check Engine Light, unpredictable engine stalling, poor fuel mileage, or harsh transmission shifting, the problem may lie with the heart of your vehicle’s electronics: the Powertrain Control Module (PCM). As the central computer, the PCM manages everything from fuel injection and ignition timing to transmission shift points and emissions systems. When it fails, it can cause a wide range of frustrating and difficult-to-diagnose issues, leaving your reliable workhorse van sidelined.
The Direct Solution for Your Vehicle’s Brain
This genuine OEM Powertrain Control Module, part number 89017733, is the definitive solution to restore your vehicle’s performance and reliability. Unlike generic modules that require expensive trips to the dealership for programming, this unit comes fully prepared for your specific vehicle. We flash it with the latest official GM software updates using the Vehicle Identification Number (VIN) you provide. This ensures that when the part arrives, it’s ready for installation, communicating perfectly with all other modules and sensors in your 2003 Express 2500, just as the factory intended.
From the Diagnostic Bay
We had a 2003 Silverado with the 8.1L come in with a complaint of intermittent stalling and a random misfire code that would jump between cylinders. The owner had already replaced the spark plugs, wires, and even the crankshaft position sensor with no success. After hours of chasing wires, we hooked up our scope to the injector control signals coming from the PCM. We found the signal for cylinder 3 would drop out randomly. We installed a VIN-programmed PCM like this one, performed a quick security relearn, and the truck ran perfectly. It’s a classic case where the root cause was the computer itself, not the parts it was controlling.
Common Symptoms of a Failing PCM
- ✔ Persistent Check Engine Light (CEL) with various trouble codes.
- ✔ Engine stalling or cutting out unexpectedly.
- ✔ Rough or erratic idling.
- ✔ Noticeable decrease in fuel economy.
- ✔ Harsh or delayed transmission shifting.
- ✔ Vehicle entering ‘limp mode’ with reduced power.
- ✔ Complete no-start condition where the engine cranks but won’t fire.
- ✔ Communication errors with diagnostic scan tools.
Why Choose Our 2003 Express 2500 Powertrain Control Module?
Getting your van back on the road shouldn’t be a complicated process. Our streamlined service eliminates the guesswork. By providing your VIN at checkout, you ensure that the 2003 Express 2500 Powertrain Control Module you receive is a direct-fit, plug-and-play component. This module is not only a replacement for part number 89017733 but is also a compatible service replacement for a wide range of other numbers, including 12581565, 12570557, and 88864822, making it a versatile solution for many GM trucks and vans from that era.
This module is the correct fit for a variety of popular GM vehicles, including:
- 2003 GMC Savana & Chevy Express Vans
- 2003 GMC Sierra & Chevy Silverado Pickups (with 4.3L or 8.1L engines)
- 2003 GMC Yukon XL 2500, Chevy Suburban 2500, and Avalanche 2500
- 2003-2004 Cadillac CTS and 2004 Corvette (verify ID 12581565)
- And many more as listed in the fitment guide.
Replacing your failing computer is a critical repair. Trust a part that is properly prepared to meet your vehicle’s exact specifications. Order today, provide your VIN, and get the correct part delivered to your door, ready to restore your vehicle’s proper function.
Frequently Asked Questions
Do I need to do any programming after I receive this PCM?
No. We program the module to the VIN you provide before shipping. It will arrive with the latest GM calibration for your vehicle’s specific configuration. It is ready for installation right out of the box.
What is a CASE Relearn and will I need one?
A Crankshaft Variation Relearn (CASE Relearn) synchronizes the PCM with the crankshaft position sensor. Many vehicles will not require this, but if you have a persistent P1336 trouble code after installation, a CASE relearn is needed. This procedure requires a high-end diagnostic scan tool and can be performed by most professional repair shops.
How do I provide my VIN number?
After you complete your purchase, you will receive instructions on how to send us your vehicle’s 17-digit VIN. We cannot ship your order until we receive and validate your VIN, as the programming is essential for the part to function.
Is this part compatible with other service numbers?
Yes. This PCM, 89017733, is a direct service replacement for numerous other part numbers, including 12581565, 12570557, 12576106, 12578127, and more. This ensures wide compatibility across the GM platform for the specified model years.
Will this fix my vehicle’s specific problem?
A failing PCM can cause a wide variety of symptoms. While this part will resolve issues directly caused by a faulty module, it is crucial to have your vehicle properly diagnosed by a qualified technician. This ensures you are replacing the correct part and not overlooking other potential issues like faulty wiring or sensors.