Is Your Lucerne Running Rough or Not Starting?
If your 2009-2011 Buick Lucerne is experiencing frustrating issues like stalling at stoplights, erratic shifting, a persistent Check Engine Light, or even a complete no-start condition, a failing Powertrain Control Module (PCM) is a very likely culprit. As the central computer for your vehicle, the PCM manages everything from fuel injection and ignition timing to transmission shift points. When it starts to fail, the symptoms can be widespread and confusing.
A Technician’s Real-World Story
“A customer’s 2010 Lucerne with the 3.9L V6 came in last week on a tow truck. It would crank but never fire up. They had already replaced the crank sensor and fuel pump with no luck. My initial scan showed no communication with the PCM. After confirming good power and ground at the module—which is tucked into the lower air cleaner box on these cars—it was clear the computer itself was internally fried. It’s a common failure point I’ve seen dozens of times; heat cycles and age take their toll on the sensitive electronics. We installed one of our pre-programmed units, performed the quick security relearn, and the car fired right up and ran perfectly.”
The Dealership-Free Solution
Don’t let a faulty PCM keep your car off the road or force you into an expensive trip to the dealership. This is a direct-replacement PCM, service number 12629019, that arrives at your door ready for installation. The biggest challenge with replacing a modern PCM is the mandatory programming, which typically requires specialized dealer equipment. We eliminate that problem entirely.
- ✔ VIN Programmed for Your Car: Simply provide us with your vehicle’s 17-digit VIN during checkout, and we will program the module with the latest, most stable software updates from General Motors.
- ✔ True Plug-and-Play: Once programmed, this module is ready to be installed. In most cases, you will only need to perform a simple security relearn procedure (often called a ‘key-on/key-off’ cycle) which requires no special tools.
- ✔ Restores Original Performance: A correctly functioning PCM will resolve issues like poor fuel economy, hesitation, and improper transmission behavior, making your Lucerne drive like new again.
- ✔ Solves Communication Faults: If your scan tool can’t communicate with the engine computer, it’s a classic sign of PCM failure. This replacement will restore that critical diagnostic link.
Guaranteed Compatibility
This module is a direct replacement for units with the following service numbers. Please check the sticker on your original PCM to ensure a match.
- ✔ 12629019
- ✔ 12597125
- ✔ 12612397
- ✔ DL216140
- ✔ 12594750
- ✔ 12635902
- ✔ 12611549
While this listing is focused on the 2009-2011 Buick Lucerne with the 3.9L engine, this versatile E38 PCM was used across a wide range of GM vehicles. Please see the detailed fitment list to confirm it is the correct part for your specific car, truck, or van. Taking a moment to verify the part number on your old unit is the best way to guarantee a smooth installation.