Restore Your Buick’s Peak Performance and Reliability
Is your Buick Lucerne acting erratically? Stalling, shifting poorly, or throwing a persistent check engine light can turn every drive into a stressful guessing game. These frustrating issues often point directly to a failing Powertrain Control Module, the vital computer that manages your engine’s performance. This direct-replacement PCM, part number 12597125, is the definitive solution to bring back the smooth, dependable ride you remember. We take the guesswork out of the repair by programming the module specifically to your vehicle’s VIN with the latest GM software updates, ensuring a seamless installation and immediate results.
Warning Signs and How to Overcome Them
A failing engine computer can manifest in numerous ways. If you’re experiencing any of the following, it’s a strong indicator that your PCM needs attention:
- ✔ Unexplained Check Engine Light illumination, often with codes like P0601, P0602, or P0606.
- ✔ A noticeable drop in fuel economy, costing you more at the pump.
- ✔ The engine cranks but refuses to start, or starts intermittently.
- ✔ Rough idling, hesitation during acceleration, or unexpected stalling.
- ✔ Automatic transmission shifting that feels harsh, delayed, or unpredictable.
- ✔ Failure to pass state emissions testing due to communication errors.
An Expert’s Note: The Phantom Problem
I once had a customer with an Impala who had spent months chasing an intermittent no-start condition. He’d replaced the battery, starter, and fuel pump, but the car would still randomly refuse to start, only to fire up perfectly an hour later. After checking all the basics, we traced it to the PCM. A hairline crack in the circuit board was separating when warm, cutting communication. Installing a properly programmed module didn’t just fix the car; it ended months of anxiety and restored his trust in his vehicle. That’s the peace of mind this part delivers.
Guided Installation for Your 2009-2011 Lucerne PCM
With our pre-programming service, installing your new engine computer is a straightforward process. This isn’t just a part; it’s a complete solution designed to get you back on the road quickly and confidently. You will need to perform a security relearn procedure after installation, which is a simple process that pairs the new computer to your vehicle’s keys.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the Module: On your Lucerne, the PCM is typically found attached to the lower part of the air cleaner box.
- Disconnect and Remove: Carefully unplug the wiring harnesses. They have locking tabs that must be released. Then, unbolt the old module from its mounting bracket.
- Install the New PCM: Mount your new, pre-programmed PCM in the same location. Securely reconnect the wiring harnesses, ensuring each plug clicks firmly into place.
- Reconnect Power: Reattach the negative battery terminal and tighten it.
- Perform Security Relearn: Turn the key to the ‘ON’ position for 10-15 minutes, then turn it off for 10 seconds. Repeat this cycle three times. On the fourth attempt, the vehicle should start, confirming the new module is paired.
Tailored Fit for Your Ride
This module is a direct replacement for service number 12597125 and is compatible with several other service numbers, including 12612397, 126140, 12594750, 12629019, 12635902, and 12611549. While it is the correct 2009-2011 Lucerne PCM for the 3.9L engine, it also fits a wide range of other GM vehicles. Please verify your part number or consult the list below:
- Aura: 2008-2009 (2.4L)
- Cobalt: 2007-2010 (2.2L, 2.4L)
- Express 1500 Van: 2008-2009 (4.3L)
- G5 / G6: 2007-2010 (2.2L, 2.4L)
- HHR: 2007-2011 (2.2L, 2.4L)
- Impala: 2010-2011
- Malibu: 2007-2012 (2.2L, 2.4L, 3.5L)
- Savana 1500 Van: 2008-2009 (4.3L)
- Sierra/Silverado 1500 Pickup: 2007-2009 (4.3L)
- Sky / Solstice: 2008-2010 (2.4L)
- Vue: 2008-2010 (2.4L)
By providing us with your VIN upon purchase, you guarantee that the module you receive is loaded with the correct software for your vehicle’s specific configuration, eliminating compatibility issues and ensuring optimal engine function from the moment of installation.
Frequently Asked Questions
Do I need to do anything after installing this PCM?
Yes. While we handle the main programming, you will need to perform a standard security relearn procedure (often called a key relearn). This process, which takes about 30 minutes, pairs the new module to your existing keys and anti-theft system. Instructions are readily available online for your specific model.
What information do you need from me?
After you complete your purchase, you must provide us with your vehicle’s 17-digit Vehicle Identification Number (VIN). This is crucial as we use it to load the exact, factory-correct software and updates for your car’s engine, transmission, and options.
Is this part difficult to install for a DIYer?
Not at all. Physically replacing the module is typically a simple job requiring basic hand tools. It involves disconnecting the battery, unplugging a few connectors, and removing a few bolts. The most important part is the security relearn, which requires no tools, only a sequence of key turns.
Will this fix my car’s specific problem?
This PCM is the solution for issues directly caused by a faulty engine computer, such as internal processor faults (e.g., code P0606), communication errors, and erratic sensor readings originating from the module. Proper vehicle diagnosis is recommended to confirm the PCM is the point of failure before ordering.
What does ‘programmed with the newest updates’ mean?
Over the life of a vehicle, manufacturers like GM often release software updates to improve performance, fuel efficiency, or fix minor bugs. When we program your module, we ensure it’s loaded with the most recent software available from GM for your VIN, giving you a component that’s often better than the one that originally came in your car.