Is Your Alero Running Rough? Get Back on the Road with Confidence.
There’s nothing more frustrating than a vehicle you can’t rely on. If your Oldsmobile Alero is suffering from baffling issues like stalling, a persistent check engine light, or poor fuel economy, the problem often points to a failing Powertrain Control Module (PCM). This isn’t just a part; it’s the brain of your engine. When it falters, everything feels wrong. This replacement PCM is the definitive, hassle-free solution to restore your vehicle’s performance and your peace of mind.
Common Symptoms & Your Solution
A faulty PCM can create a cascade of confusing problems. You might be experiencing one or more of the following issues:
- Check Engine Light (CEL) Illumination: Often with communication error codes like P0601, P0605, or P0606.
- Engine Performance Problems: Stalling, rough idling, hesitation during acceleration, or a complete no-start condition.
- Poor Fuel Economy: The engine isn’t receiving the correct data to run efficiently, causing you to spend more at the pump.
- Erratic Transmission Shifting: The PCM also controls transmission functions, and a failure can lead to harsh or incorrect shifts.
This module is the answer. We take the guesswork and high cost out of the repair. By providing us with your Vehicle Identification Number (VIN), we program this 2003-2004 Alero PCM with the very latest GM software updates specific to your car. It arrives at your door ready for a straightforward installation, getting you back behind the wheel faster.
Features & Benefits
- âś” VIN-Programmed for You: Arrives flashed to your specific vehicle, ensuring perfect compatibility and eliminating the need for an expensive trip to the dealership.
- âś” Updated GM Software: Programmed with the newest factory calibrations for optimal engine performance, fuel efficiency, and emissions control.
- âś” Direct-Fit Replacement: Engineered to be a perfect match for the original unit, making the installation process as simple as possible.
- âś” Solves Common Driveability Issues: The definitive fix for a wide range of frustrating engine and transmission problems caused by a failing computer.
- âś” Broad Compatibility: A direct replacement for part numbers 89017735, 12583827, and 12583826, fitting a wide range of GM vehicles (see fitment list).
- âś” This unit is backed by our one-year replacement warranty for your confidence.
An Expert’s Note: I’ve seen countless DIY mechanics and shop owners waste hundreds of dollars on unnecessary parts, chasing down issues that were ultimately caused by the PCM. The biggest hurdle is often the programming. A generic module from a parts store still needs to be towed to a dealer for flashing. This pre-programmed 2003-2004 Alero PCM completely bypasses that step. You’re not just buying a part; you’re buying a complete, ready-to-install solution that saves you time, money, and a massive headache.
Frequently Asked Questions
What do I need to do after I place my order?
After you complete your purchase, you must provide us with your vehicle’s 17-digit VIN. We cannot program and ship your module without it. You can typically add this as a note during checkout or send it to us in a message referencing your order number.
Is this a simple plug-and-play installation?
For most vehicles, yes. Because it’s programmed to your VIN, it will integrate with your engine and transmission. However, like any PCM replacement on these GM vehicles, you will need to perform a simple security relearn procedure (often called a Passlock or VATS relearn) so the module recognizes your existing keys. This procedure can be done without any special tools and instructions are widely available online.
Will this fix my check engine light?
If the check engine light is on due to an internal failure of the original PCM (common codes include P0601-P0606), then this replacement module will solve the problem. It’s crucial to ensure your vehicle’s other sensors and wiring are in good condition.
How do I find my VIN?
Your VIN is located in several places: on a metal tag on the driver’s side of the dashboard visible through the windshield, on the driver’s side door jamb sticker, and on your vehicle’s registration and insurance documents.
What if my original part number is slightly different?
This module is a direct replacement for part numbers 89017735, 12583827, and 12583826. Please check the extensive fitment list provided on this page. If your vehicle is listed, this module is the correct fit, even if the number on your old unit differs.
Does this 2003-2004 Alero PCM come with new keys?
No, it does not come with keys. The module is programmed to work with your vehicle, and after the security relearn procedure, it will sync with your existing set of keys.