Is Your Buick Park Avenue Running Rough?
If your 2003 or 2004 Buick Park Avenue is suffering from frustrating issues like intermittent stalling, poor fuel economy, a persistent check engine light, or a complete no-start condition, a failing Powertrain Control Module (PCM) is often the culprit. As the central computer for your vehicle, the PCM controls everything from fuel injection and spark timing to transmission shift points. When it fails, the symptoms can be unpredictable and difficult to diagnose, leaving you stranded and facing a costly trip to the dealership.
“A customer’s ’03 LeSabre with the 3.8L engine came into my shop last month. It had a random misfire and would occasionally stall at red lights. The previous mechanic wanted to replace the PCM immediately. However, after 20 years of working on these GM vehicles, I know to check the basics first. A quick inspection revealed corrosion inside the connector for the Crankshaft Position Sensor. After a thorough cleaning and applying dielectric grease, the problem was solved. Always inspect your wiring and sensor connections before condemning the computer—it can save you hundreds.”
The Direct, Reliable Solution for Your GM Vehicle
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take a genuine OEM Powertrain Control Module and professionally program it with the latest GM-certified software updates, specifically matched to your vehicle’s unique Vehicle Identification Number (VIN). This process ensures that your engine and transmission operate exactly as the manufacturer intended, restoring lost performance and efficiency.
Why Choose Our 2003-2004 Park Avenue PCM?
- âś” VIN-Programmed for You: We flash the module with your car’s VIN, ensuring perfect communication with all other onboard systems. No extra programming needed.
- âś” Latest GM Software: Your module arrives with the most current software, addressing common factory bugs and improving drivability.
- âś” Eliminate Dealer Hassle: Skip the expensive dealership visit and programming fees. This module is designed for a straightforward, do-it-yourself installation.
- âś” Guaranteed Compatibility: This PCM is a direct replacement for service numbers 12583826 and 89017735.
Plug-and-Play Installation: Get Back on the Road Fast
Installing your new 2003-2004 Park Avenue PCM is a simple process that can be done with basic hand tools. It is located in the LH (driver’s side) front of the engine compartment, typically inside the air filter box assembly for easy access.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the PCM: Open the air filter housing on the driver’s side of the engine bay. The PCM is the metal box with large electrical connectors.
- Disconnect Connectors: Carefully unlatch and remove the wiring harness connectors from the old module. Inspect them for any signs of corrosion or damage.
- Swap the Modules: Unbolt and remove the old PCM. Mount the new module in its place, ensuring it is secure.
- Reconnect Everything: Firmly plug the wiring harnesses into your new PCM until they click into place. Reconnect your negative battery terminal.
- Final Check: Start the vehicle. The check engine light may stay on for a short period as the system relearns. A short drive cycle is usually all that’s needed.
Vehicle Fitment Information
This module is a confirmed fit for the following vehicles, matching the specified part or service numbers:
- 2003 Buick LeSabre (ID 12583826)
- 2003-2004 Buick Park Avenue
- 2003-2004 Buick Regal
- 2003 Pontiac Bonneville (ID 12583826)
- 2003 Pontiac Grand Prix (3.8L, ID 12583826)
- 2003 Chevrolet Impala (3.8L, ID 12583826 or 89017735)
- 2003 Chevrolet Monte Carlo (3.8L, ID 12583826)
IMPORTANT: After your purchase, please send us your vehicle’s VIN. We cannot ship your part until we have this information to complete the required programming.