Restore Your Minivan’s Performance and Reliability
If your 2003-2004 Oldsmobile Silhouette is suddenly stalling, shifting erratically, or showing a persistent Check Engine Light, the Powertrain Control Module (PCM) is a likely culprit. As a seasoned technician, I’ve seen firsthand how a failing PCM can turn a reliable family vehicle into a source of constant frustration. This isn’t just an inconvenience; it’s a critical component responsible for managing your engine’s fuel delivery, ignition timing, and transmission shifting. Driving with a faulty one can lead to poor fuel economy, failed emissions tests, and even leave you stranded.
This replacement Powertrain Control Module, part number 89017735, is the definitive solution. We take the guesswork and high cost out of the repair by programming the module specifically for your vehicle using your VIN. This ensures it has the latest GM software updates, addressing common drivability issues right out of the box. You get a reliable part that’s ready to install, without the expensive trip to a dealership for programming.
Case Study: A Tricky Diagnosis
I remember a 2004 Pontiac Montana—which uses this exact same PCM—that came into my bay with a complaint of intermittent stalling, but only after it had been driven for 30+ minutes. There were no consistent trouble codes, just a frustrated owner who had already replaced the fuel pump. After monitoring live data, I noticed the fuel injector pulse width would suddenly drop to zero right before it stalled. Tapping on the PCM housing while the engine was hot caused the same issue. The module’s internal circuits were failing under heat soak. Replacing the PCM with a pre-programmed unit like this one solved the problem permanently. These intermittent issues are classic signs of a failing 2003-2004 Silhouette PCM.
Is Your GM Vehicle Showing These Symptoms?
A failing PCM can manifest in various ways. If you’re experiencing any of the following, this module is the likely fix:
- âś” Persistent Check Engine Light with codes like P0601 (Internal Control Module Memory Check Sum Error) or P0606 (PCM Processor Fault).
- âś” The engine cranks but refuses to start.
- âś” Unexpected stalling, especially when the vehicle is warm.
- âś” Harsh or erratic automatic transmission shifting.
- âś” A noticeable drop in fuel economy.
- âś” Communication errors with diagnostic scan tools.
Why Our VIN-Programmed 2003-2004 Silhouette PCM is the Smart Choice
The biggest hurdle in replacing a modern vehicle’s computer is the programming. Without it, the car won’t start or run correctly. We handle that for you. Simply provide your vehicle’s 17-digit VIN during checkout, and our experts will flash the module with the correct, updated software from GM. This makes the installation process significantly easier for both DIY mechanics and professional shops, saving you hundreds in dealership labor and programming fees.
A Straightforward Guide to Installation
Replacing the PCM on these vans is generally a simple job located in the driver’s side of the engine compartment, often integrated with the air filter housing. While specific steps may vary slightly, here is a general guide:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the PCM: Open the hood and find the air cleaner assembly on the driver’s side. The PCM is typically mounted within this housing.
- Disconnect the Air Intake: You will likely need to remove the air intake ducting and the top of the air filter box to access the module and its connectors.
- Unplug the Connectors: Carefully unplug the large electrical connectors from the old PCM. They have locking tabs or levers that must be released first—do not force them.
- Remove the Old Module: Unbolt the old PCM from its mounting bracket.
- Install the New Module: Seat the new, programmed PCM into the bracket, plug in the connectors securely, and reassemble the air filter housing.
- Reconnect the Battery: Once everything is reassembled, reconnect the negative battery terminal.
- Perform Security Relearn: You may need to perform a simple security relearn procedure. Turn the key to the ‘ON’ position for 10 minutes, then ‘OFF’ for 10 seconds. Repeat this two more times for a total of 3 cycles. This allows the vehicle’s anti-theft system to recognize the new PCM.
Verified Vehicle Compatibility
This module is a direct replacement for part numbers 12583827 and 12583826 and fits a wide range of GM vehicles. Please verify your vehicle is on this list:
Aztek: 2003-2005
Bonneville: 2004-2005 (3.8L)
Century: 2003-2005
Grand Am: 2003-2005 (3.4L)
Grand Prix: 2003 (3.1L)
Impala: 2003-2005
LeSabre: 2004-2005
Malibu: 2003
Monte Carlo: 2003-2005
Montana: 2003-2005
Park Avenue: 2004-2005
Rendezvous: 2003-2005
Silhouette: 2003-2004
Venture: 2003-2005
Frequently Asked Questions
What does a Powertrain Control Module (PCM) do?
The PCM is your vehicle’s main computer. It controls critical functions of the engine and transmission to ensure optimal performance, fuel efficiency, and emissions.
Does this module come ready to install?
Yes! We program it using your VIN before shipping. While the core programming is complete, you may need to perform a simple key-cycle security relearn procedure after installation, which requires no special tools.
Where is the PCM located on my 2004 Oldsmobile Silhouette?
On the 2003-2004 Silhouette and similar GM minivans, the PCM is typically housed within the air cleaner assembly in the engine compartment on the driver’s side.
How do I provide my VIN?
You can add your 17-digit Vehicle Identification Number (VIN) in the notes section during checkout or send it to us in a message after your purchase. We cannot ship the module until we receive your VIN.
Will this fix my check engine light for code P0601?
Yes, a P0601 code indicates an internal memory failure in the PCM itself. Replacing the module with this pre-programmed unit is the correct and necessary repair for that specific fault code.