Restore Peak Performance to Your GM Vehicle
Is your Cadillac Escalade, Chevy Silverado, or GMC Sierra running rough, stalling, or showing a persistent check engine light? These are classic signs of a failing Engine Control Module (ECM), the central computer that manages your vehicle’s engine performance, fuel economy, and emissions. A faulty ECM can lead to a cascade of frustrating and potentially damaging issues. This replacement Engine Control Module, part number 12633055, is the definitive solution to restore your vehicle’s factory performance and reliability.
What sets our ECM apart is our complimentary programming service. Before we ship your part, we flash it with the latest official GM software updates, specifically matched to your vehicle’s unique Vehicle Identification Number (VIN). This means you receive a module that is truly ready for installation, eliminating the need for expensive trips to the dealership for programming. Simply provide your VIN at checkout, and we handle the rest, ensuring a seamless and straightforward repair process.
From the Diagnostic Bay
We had a 2012 GMC Yukon come into the shop with a ghost of a problem. The owner complained of intermittent stalling at stoplights and a weird hesitation under acceleration. No consistent codes were being stored, just a generic P0300 random misfire code every now and then. We checked everything: plugs, coils, fuel pressure, and vacuum leaks—all were perfect. After hours of diagnostics, we hooked up a scope to the injector drivers and saw the signal dropping out intermittently. The culprit was a failing driver inside the original ECM. We ordered one of these pre-programmed 12633055 modules, installed it, performed a quick security relearn, and the Yukon ran like it just rolled off the assembly line. The customer was thrilled to have his truck back without a massive dealership bill.
Is Your 2010-2014 Escalade ECM Failing?
A failing engine computer can manifest in various ways, often mimicking other component failures. If you’re experiencing any of the following symptoms, a faulty ECM could be the root cause. This module is the perfect fix for these common issues.
- ✔ Persistent Check Engine Light (CEL) that won’t clear
- ✔ Engine stalling or shutting off unexpectedly
- ✔ Rough idling or misfires
- ✔ Noticeable decrease in fuel efficiency
- ✔ Hesitation or stumbling during acceleration
- ✔ Difficulty starting the engine or a complete no-start condition
- ✔ Communication errors with diagnostic scan tools
- ✔ Unexplained transmission shifting problems
Guaranteed Fitment and Simple Installation
This ECM, also known by part number 12633238, is a direct-fit replacement for a wide array of popular GM trucks, vans, and performance cars. It is engineered to meet or exceed original equipment specifications for vehicles like the Cadillac Escalade, Chevrolet Silverado, GMC Sierra, Chevrolet Corvette, and Chevrolet Camaro. The VIN-specific programming ensures that all engine parameters, transmission controls, and security systems function exactly as the manufacturer intended. Installation is straightforward for any competent DIYer or professional technician. Once installed, some vehicles may require a simple security relearn procedure (often called a key relearn), which can typically be done without special tools and takes only a few minutes.
Don’t let a faulty computer keep your vehicle off the road. Order this pre-programmed Engine Control Module today, provide your VIN, and get ready to experience the smooth, reliable performance you’ve been missing.
Frequently Asked Questions
Do I need to have this ECM programmed?
No. This ECM comes fully programmed to your vehicle’s specific VIN before it is shipped. You just need to provide us with your VIN during or after your purchase. This saves you a costly trip to the dealership.
What is a security relearn procedure?
A security relearn, or key relearn, is a simple procedure that syncs the new ECM with your vehicle’s anti-theft system. For most GM vehicles of this era, it involves turning the key to the ‘ON’ position for 10-15 minutes, then off, and repeating this sequence three times. Instructions are readily available online for specific models.
Where can I find my vehicle’s VIN?
Your 17-digit Vehicle Identification Number (VIN) can be found on your vehicle’s registration, insurance card, or on the driver’s side of the dashboard, visible through the windshield.
Is this a genuine GM part?
This is a high-quality replacement part built to meet or exceed original equipment (OE) specifications. We use official GM software updates to ensure it functions identically to a new factory module.
Will this fix my check engine light?
If the check engine light is caused by a faulty ECM, then yes, this part will resolve the issue. It is crucial to properly diagnose the vehicle first to ensure the ECM is the source of the problem, as other failing sensors or components can also trigger a check engine light.