Get Your GM Van or Truck Running Reliably Again
If you’re dealing with frustrating engine problems in your 2003 GMC Savana 2500 or another compatible GM vehicle, you know how disruptive it can be. A faulty Powertrain Control Module (PCM), the brain of your vehicle’s engine and transmission, is often the culprit behind issues that seem impossible to diagnose. This replacement PCM, part number 89017733, is the definitive solution to restore your vehicle’s performance and dependability. We take the guesswork and hassle out of the repair by programming the module specifically to your vehicle’s VIN with the latest official GM software updates before it ships. This means no expensive trips to the dealership for programming—it’s ready to install right out of the box.
A Technician’s Notebook: The Intermittent Stall Case
I remember a 2003 Express van that came into my bay a few years back. The owner was at his wit’s end. It would run perfectly for days, then suddenly stall at a stoplight and refuse to restart for 10-15 minutes. Other shops had replaced the fuel pump and crank sensor, but the problem persisted. No hard codes were stored, just a few random communication errors. After checking all the wiring, I focused on the PCM. On the bench, I noticed that with a little heat applied—simulating a hot engine bay—the PCM would fail. It was an internal solder joint fracture. We installed a correctly programmed PCM, and the van never had that stalling issue again. This is a classic example of how a failing 2003 Savana 2500 PCM can cause ghost-like problems that parts-swapping won’t fix.
Is Your GM Vehicle Showing These Signs of PCM Failure?
A failing engine computer can manifest in numerous ways, from subtle performance drops to a complete no-start condition. If you’re experiencing any of the following, a faulty PCM could be the root cause. This is especially true if you see persistent diagnostic trouble codes (DTCs) that won’t clear.
- ✔ Check Engine Light is on with codes like P0601 (Internal Control Module Memory Check Sum Error), P0606 (PCM Processor Fault), or other communication errors.
- ✔ The engine cranks but refuses to start.
- ✔ Unexplained stalling or rough, erratic idling.
- ✔ A noticeable decrease in fuel economy.
- ✔ Harsh or incorrect shifting from the automatic transmission.
- ✔ The cooling fans run constantly or not at all.
- ✔ Your scan tool cannot communicate with the PCM.
Your Straightforward Installation Guide
Replacing the PCM on these GM vans and trucks is a job most DIYers can handle with basic tools. Our pre-programming service makes it a simple component swap.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent accidental reconnection.
- Locate the PCM: On the 2003 Savana/Express vans, the PCM is located in the engine compartment on the driver’s side, typically near the rear of the engine bay. On trucks like the Sierra/Silverado, it’s usually on the driver’s side fender, under the battery tray.
- Disconnect the Connectors: Carefully release the locking tabs on the electrical harness connectors and pull them straight out from the module. Avoid damaging the pins or the harness.
- Remove the Old Module: Unbolt the old PCM from its mounting bracket. Keep the hardware, as you may need to reuse it.
- Install the New Module: Mount your new, pre-programmed PCM onto the bracket and securely fasten it.
- Reconnect Everything: Plug the electrical connectors firmly back into the new PCM until they click, ensuring a secure connection. Reconnect the negative battery terminal.
- Final Steps: The vehicle may need to perform a security relearn procedure, which often involves turning the key to the ‘ON’ position for 10-15 minutes. Start the engine and let it idle for a few minutes to allow the computer to learn the engine’s parameters.
Verified Vehicle Compatibility List
This module is a direct replacement for a wide range of GM vehicles. Please verify your model and options below. This part is compatible with service numbers 12581565, 12570557, 12576106, 88864822, and 89017733, among others listed in the original data.
- ASTRO 03: Electronic Control Module; (LH front by battery)
- AVALANCHE 2500 03: Electronic Control Module; (LH front under battery)
- BLAZER S10/JIMMY S15 03: Electronic Control Module; (RH front engine compartment)
- CTS 04: Electronic Control Module; (RH engine compartment), Base, ID 12581565
- CORVETTE 04: Electronic Control Module; (RH engine compartment), ID 12581565
- EXPRESS 1500/2500/3500 VAN 03: Electronic Control Module; (LH rear engine compartment)
- S10/S15/SONOMA 03: Electronic Control Module; (RH front engine compartment), 4.3L
- SAFARI (GMC) 03: Electronic Control Module; (LH front by battery)
- SAVANA 1500/2500/3500 VAN 03: Engine Computer (LH rear engine compartment)
- SIERRA 1500 PICKUP 03: Electronic Control Module; (LH front under battery), w/4.3L
- SIERRA 2500/3500 PICKUP 03: Powertrain Control Module; (LH front under battery), gasoline, 8.1L
- SILVERADO 2500/3500 PICKUP 03: Engine Control Module; (LH front under battery), gasoline, 8.1L
- SUBURBAN 2500 03: Electronic Control Module; (LH front under battery), 8.1L
- YUKON XL 2500 03: Electronic Control Module; (LH front under battery), 8.1L
Frequently Asked Questions
Do I need to do any programming or flashing myself?
No. We handle all the programming before we ship the part. Just provide your vehicle’s VIN during checkout, and we will load the latest GM software for your specific vehicle. It arrives ready to install.
What is a VIN and where do I find it?
The VIN (Vehicle Identification Number) is a unique 17-digit code for your vehicle. You can find it on your vehicle’s registration, insurance card, or on a small plate on the driver’s side of the dashboard, visible through the windshield.
Will this fix my check engine light?
If the check engine light is caused by a faulty PCM (e.g., code P0601), then yes, this part will resolve the issue. However, you should always ensure other potential problems (like faulty sensors or wiring) have been ruled out by a proper diagnosis.
Is this a simple plug-and-play installation?
Yes, for the vast majority of vehicles. Because it’s pre-programmed, you simply swap the old module with this one. In some cases, a simple security relearn procedure (turning the key on for 10-15 minutes) may be required, which does not need any special tools.
What happens after I place my order?
After you purchase the 2003 Savana 2500 PCM, we will need you to send us your vehicle’s VIN. Once we receive the VIN, our technicians will program the module and typically ship it within one business day.