Is Your 2003-2005 Impala Experiencing Mysterious Problems?
If you’re dealing with frustrating issues like intermittent stalling, harsh or erratic transmission shifting, a persistent check engine light, or even a no-start condition, the problem often points directly to a failing Powertrain Control Module (PCM). As the central computer for your vehicle, the PCM is responsible for managing everything from fuel delivery and ignition timing to transmission shift points and emissions controls. When it starts to fail, the symptoms can be confusing and difficult to diagnose.
Over my 20+ years in the shop, I’ve seen countless GM vehicles from this era with these exact complaints. The internal electronic components of the PCM can degrade over time due to heat cycles and vibration, leading to communication errors and incorrect commands being sent to the engine and transmission.
A Technician’s Real-World Diagnostic Story
“A customer’s 2004 Impala came in last week with these exact symptoms. It had an intermittent no-crank condition and when it did run, the transmission would slam into gear. They had already replaced the battery and starter with no success. After hooking up my scan tool, I noticed communication dropouts with the PCM. We swapped in one of our pre-programmed modules, performed the security relearn, and the car started and drove perfectly. It wasn’t a mechanical failure; it was the vehicle’s brain that was malfunctioning. This is a scenario I’ve seen play out hundreds of times on these platforms.”
The Direct, Reliable Solution: A VIN-Programmed PCM
Don’t waste time and money chasing phantom issues or installing a used module that could fail at any moment. This Powertrain Control Module is the definitive solution, arriving at your door fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). This isn’t just a convenience—it’s a critical step for ensuring proper function.
- ✔ Eliminate Guesswork: This module directly addresses common failure points in the original PCM, resolving issues like stalling, poor fuel economy, and erratic behavior.
- ✔ Latest GM Software: We flash the module with the most current GM-released calibrations for your specific VIN. This often includes fixes for drivability issues and performance enhancements that GM developed after your car left the factory.
- ✔ Plug & Play Installation: Because we handle the programming, you avoid a costly and time-consuming trip to the dealership. Once installed, you will only need to perform a standard security relearn procedure, which can often be done without special tools.
- ✔ Guaranteed Compatibility: Providing your VIN ensures we load the correct software for your Impala’s specific engine, transmission, and options package.
Why VIN Programming is Non-Negotiable
A PCM from another vehicle simply will not work correctly. The VIN is tied to critical systems, including the anti-theft system (Passlock/VATS), transmission type, and engine parameters. Our programming service ensures all these systems communicate seamlessly, just as the factory intended. After purchase, simply send us your VIN, and our experts will handle the rest, ensuring a module that is perfectly matched to your car.
Cross-Reference & Fitment Information
This module, part number 89017735, is a direct replacement for several original equipment part numbers and fits a wide range of GM vehicles. Please verify compatibility below.
- ✔ Compatible Part Numbers: 12583827, 12583826
- ✔ Vehicle Fitment:
- ✔ ALERO 03-04 (Electronic Control Module; LH center dash, 3.4L)
- ✔ AZTEK 03-05 (Electronic Control Module; LH engine compartment)
- ✔ BONNEVILLE 04-05 (Electronic Control Module; LH engine compartment, 3.8L)
- ✔ CENTURY 03-05 (Electronic Control Module; LH engine compartment)
- ✔ GRAND AM 03-05 (Electronic Control Module; LH center dash, 3.4L)
- ✔ GRAND PRIX 03 (Electronic Control Module; LH front engine compartment, 3.1L)
- ✔ IMPALA 03-05 (Electronic Control Module)
- ✔ LESABRE 04-05 (Electronic Control Module; LH engine compartment)
- ✔ MALIBU 03 (Electronic Control Module; LH dash)
- ✔ MONTE CARLO 03-05 (Electronic Control Module)
- ✔ MONTANA 03-05 (Electronic Control Module; LH engine compartment)
- ✔ PARK AVENUE 04-05 (Electronic Control Module; LH front engine compartment)
- ✔ RENDEZVOUS 03-05 (Electronic Control Module; LH engine compartment)
- ✔ SILHOUETTE 03-04 (Electronic Control Module; LH engine compartment)
- ✔ VENTURE 03-05 (Electronic Control Module; LH engine compartment)