Is your 2010 or 2011 Chevrolet Impala suffering from frustrating issues like a persistent check engine light, erratic performance, or a no-start condition? The Powertrain Control Module (PCM), the central computer of your vehicle, is often the culprit. This replacement PCM, service number 12618028, is the definitive solution to restore your vehicle’s factory performance, drivability, and reliability. We pre-program this module to your vehicle’s specific Vehicle Identification Number (VIN), ensuring it works seamlessly with your Impala’s existing systems right out of the box, though a simple security relearn procedure may be required.
The Brain of Your Impala’s Engine
The PCM is a sophisticated computer responsible for managing every critical aspect of your engine and transmission. It constantly analyzes data from sensors throughout the vehicle to control fuel mixture, ignition timing, transmission shift points, and emissions systems. When it fails, the symptoms can range from minor annoyances to major problems that leave you stranded. A failing module can cause incorrect signals, leading to poor fuel economy, failed emissions tests, and potential damage to other components like the catalytic converter.
Expert Pro Tip
Before replacing your PCM, always perform a thorough check of your vehicle’s battery, terminals, and primary ground connections (engine-to-chassis and battery-to-chassis). A weak battery or a corroded ground can cause voltage drops and electrical noise, mimicking the symptoms of a failed PCM. This simple step can save you time and money in your diagnosis.
Diagnosing a Faulty 2010-2011 Impala PCM
Identifying a failing PCM can be tricky, as its symptoms often overlap with other faulty components. However, a combination of the following issues strongly points to the engine computer. If you’re experiencing several of these problems, it’s highly likely that a replacement module is the correct repair. This unit is a direct replacement for multiple service numbers, including 12597125, 12612397, 12594750, 12629019, 12635902, and 12611549, making it a versatile solution for a wide range of GM vehicles.
Common Failure Symptoms
- ✔ Persistent Check Engine Light (CEL) with communication error codes (U-codes) or multiple random codes.
- ✔ Vehicle will not start, or starts and immediately stalls.
- ✔ Poor or erratic automatic transmission shifting.
- ✔ Noticeable decrease in fuel economy.
- ✔ Engine stumbling, misfiring, or running rough.
- ✔ Intermittent stalling for no apparent reason.
- ✔ Failure to communicate with a diagnostic scan tool.
Ordering from us is simple. Just provide your 17-digit VIN during or after checkout. Our technicians will flash the module with the latest GM-certified software for your exact vehicle configuration. This ensures all systems, from the engine and transmission to the anti-theft system, function exactly as the manufacturer intended. Get your Impala back on the road with confidence by installing a reliable, professionally programmed PCM.
Frequently Asked Questions
Is this module difficult to install?
No, the physical installation is straightforward. On the 2010-2011 Impala, the PCM is located within the air cleaner box assembly. It involves disconnecting the battery, removing the airbox cover, unplugging the electrical connectors, and swapping the module. The most critical part is performing the security relearn procedure after installation, which can typically be done without special tools. Instructions are widely available online or in service manuals.
What information do you need to program the PCM?
We only need your vehicle’s 17-digit Vehicle Identification Number (VIN). This number allows us to access the correct factory software and calibration files for your Impala’s specific engine, transmission, and options.
Will this fix my transmission shifting problems?
In many cases, yes. The PCM also functions as the Transmission Control Module (TCM) in this vehicle platform. It controls shift solenoids and line pressure based on speed, throttle position, and engine load. If your shifting issues are electronic in nature and not caused by a mechanical fault within the transmission, a new PCM will solve the problem.
What is a security relearn procedure?
A security relearn, also known as a VATS (Vehicle Anti-Theft System) relearn, synchronizes the new PCM with your vehicle’s ignition key and Body Control Module (BCM). It’s a simple procedure that usually involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating this cycle three times. This tells your car that the new PCM is an authorized component.
Is this compatible with other GM vehicles?
Yes. While this listing is for the 2010-2011 Impala, this PCM hardware is used across a wide variety of GM cars and trucks from roughly 2007-2012, including the Cobalt, Malibu, HHR, Silverado, and G6. The specific programming we apply makes it correct for your vehicle. Please verify fitment by the service numbers listed.