Restore Peak Performance to Your Vehicle
Is your GM vehicle suffering from perplexing issues like a persistent check engine light, poor fuel economy, erratic shifting, or even a no-start condition? The problem often lies with a failing Engine Control Module (ECM), the central computer that manages your engine’s most critical functions. This replacement Engine Control Module, part number 12625455 (also compatible with 12629009), is the definitive solution to restore your vehicle’s performance, reliability, and efficiency.
Unlike a generic part from a salvage yard, this module is not just a replacement; it’s a complete, ready-to-install solution. Our expert technicians will program the unit specifically for your vehicle using your unique Vehicle Identification Number (VIN). This ensures that the ECM has the latest software updates from GM and is perfectly matched to your engine, transmission, and factory options, eliminating the need for an expensive trip to the dealership for programming.
From the Diagnostic Bay
We had a 2009 Chevy Silverado come into the shop with a complaint that stumped two other mechanics. The truck would randomly stall at stoplights and had a harsh 1-2 shift, but only when warm. There were no consistent trouble codes, just a generic U0100 ‘Lost Communication’ code that would pop up intermittently. We checked all the usual suspects—wiring, grounds, sensors—and found nothing. On a hunch, we monitored the live data stream from the ECM and noticed the processor would occasionally freeze for a split second, just long enough to cause a hiccup but not long enough to set a specific fault. We replaced the original ECM with one of our pre-programmed units matched to the truck’s VIN. The stalling and shifting problems vanished immediately. It’s a classic case of how a failing computer can create ghost-like symptoms that are impossible to trace without pinpointing the source.
Is Your 2010 VUE Engine Computer Failing?
A faulty ECM can manifest in numerous ways, often mimicking other component failures. Diagnosing an ECM issue can be tricky, but there are several common red flags to watch for. If you’re experiencing one or more of the following, a failing engine computer could be the culprit.
Common Symptoms of a Failing ECM
- ✔ Check Engine Light: The light is illuminated, often with communication-related trouble codes (U-codes) or multiple random sensor codes.
- ✔ Engine Performance Issues: You may notice a significant drop in power, poor acceleration, stuttering, or engine misfires that aren’t resolved with new spark plugs or coils.
- ✔ Poor Fuel Economy: A sudden and unexplained decrease in your vehicle’s MPG can be caused by the ECM failing to properly manage the fuel-to-air ratio.
- ✔ Transmission Problems: The ECM works closely with the Transmission Control Module (TCM). A failing ECM can cause harsh shifting, delayed engagement, or getting stuck in one gear.
- ✔ Intermittent or Total No-Start: The vehicle may crank but refuse to start, or it may start unpredictably. This can happen when the ECM fails to control the ignition or fuel systems.
- ✔ Stalling: The engine may stall for no apparent reason, either while driving or at an idle.
Simple, VIN-Programmed Installation
Our goal is to make this repair as straightforward as possible. The process is simple:
- Place Your Order: Purchase this ECM for your vehicle.
- Provide Your VIN: After checkout, send us your 17-digit VIN. This is crucial for correct programming.
- We Program & Ship: Our technicians will flash the module with the latest GM software specific to your vehicle’s configuration. We then ship the ready-to-install part directly to you.
Once you receive the module, installation is typically a direct swap of the old unit. In some cases, a simple “Security Relearn” procedure may be required, which can often be performed without any special tools. This procedure resynchronizes the new ECM with your vehicle’s anti-theft system.
SILVERADO 2500 PICKUP 10 Electronic Control Module; (LH front engine compartment), 6.0L, VIN K (8th digit, opt LY6)
SUBURBAN 1500 09 Electronic Control Module; (LH front engine compartment)
VUE 10 Electronic Control Module; 3.5L
ESCALADE 09 Electronic Control Module; (LH front engine compartment), 6.2L
ESCALADE ESV 09 Electronic Control Module; (LH front engine compartment)
G6 09 Electronic Control Module; (LH front engine compartment), 3.9L
SIERRA 2500 PICKUP 09 Electronic Control Module; (LH front engine compartment), 6.0L
SILVERADO 2500 PICKUP 09 Electronic Control Module; (LH front engine compartment), 6.0L
SILVERADO 3500 PICKUP 09 Electronic Control Module; (LH front engine compartment), 6.0L
YUKON XL 2500 10 Electronic Control Module; (LH front engine compartment), ID 12625455
HUMMER H2 09 Electronic Control Module; (LH front engine compartment)
MALIBU 09 Electronic Control Module; 3.5L
YUKON 10 Electronic Control Module; (LH front engine compartment), w/o hybrid option; ID 12625455
AVALANCHE 1500 09 Electronic Control Module; (LH front engine compartment)
SIERRA DENALI 09 Electronic Control Module; (LH front engine compartment)
SIERRA 1500 PICKUP 09 Electronic Control Module; (LH front engine compartment), w/o hybrid option; w/o 4.3L
SIERRA 3500 PICKUP 09 Electronic Control Module; (LH front engine compartment), 6.0L
SAVANA 2500 VAN 09 Electronic Control Module; (LH rear engine compartment), 6.0L
SAVANA 3500 VAN 09 Electronic Control Module; (LH rear engine compartment), 6.0L
SIERRA DENALI 10 Electronic Control Module; (LH front engine compartment), ID 12629009
TAHOE 09 Electronic Control Module; (LH front engine compartment), w/o hybrid option
YUKON XL 2500 09 Electronic Control Module; (LH front engine compartment)
ESCALADE 10 Electronic Control Module; (LH front engine compartment), 6.2L, ID 12625455
ESCALADE EXT 09 Electronic Control Module; (LH front engine compartment)
EXPRESS 2500 VAN 09 Electronic Control Module; (LH rear engine compartment), 4.8L
SUBURBAN 2500 10 Electronic Control Module; (LH front engine compartment), ID 12625455
AVALANCHE 1500 10 Electronic Control Module; (LH front engine compartment), ID 12625455
CORVETTE 09 Electronic Control Module; (RH engine compartment), Base
SIERRA 2500 PICKUP 10 Electronic Control Module; (LH front engine compartment), 6.0L, VIN K (8th digit, opt LY6)
G8 09 Electronic Control Module; ID 12625455
SILVERADO 1500 PICKUP 09 Electronic Control Module; (LH front engine compartment), w/o hybrid option; w/o 4.3L
YUKON 09 Electronic Control Module; (LH front engine compartment), w/o hybrid option
YUKON XL 1500 09 Electronic Control Module; (LH front engine compartment)
G6 09 Electronic Control Module; (LH front engine compartment), 3.5L
IMPALA 09 Electronic Control Module; (lower part of air cleaner box), 3.9L
SUBURBAN 1500 10 Electronic Control Module; (LH front engine compartment), ID 12625455
EXPRESS 2500 VAN 09 Electronic Control Module; (LH rear engine compartment), 6.0L
IMPALA 09 Electronic Control Module; (lower part of air cleaner box), 3.5L
SAVANA 1500 VAN 09 Electronic Control Module; (LH rear engine compartment), 5.3L
SAVANA 3500 VAN 09 Electronic Control Module; (LH rear engine compartment), 4.8L
SUBURBAN 2500 09 Electronic Control Module; (LH front engine compartment)
TAHOE 10 Electronic Control Module; (LH front engine compartment), w/o hybrid option; ID 12625455
EXPRESS 3500 VAN 09 Electronic Control Module; (LH rear engine compartment), 4.8L
SAVANA 2500 VAN 09 Electronic Control Module; (LH rear engine compartment), 4.8L
SIERRA 3500 PICKUP 10 Electronic Control Module; (LH front engine compartment), 6.0L, VIN K (8th digit, opt LY6)
SILVERADO 3500 PICKUP 10 Electronic Control Module; (LH front engine compartment), 6.0L, VIN K (8th digit, opt LY6)
SIERRA DENALI 10 Electronic Control Module; (LH front engine compartment), ID 12625455
ESCALADE ESV 10 Electronic Control Module; (LH front engine compartment), ID 12625455
ESCALADE EXT 10 Electronic Control Module; (LH front engine compartment), ID 12625455
EXPRESS 1500 VAN 09 Electronic Control Module; (LH rear engine compartment), 5.3L
Frequently Asked Questions
What is an ECM and what does it do?
The Engine Control Module (ECM), or engine computer, is the brain of your vehicle’s engine. It controls and monitors dozens of functions in real-time, including fuel injection, ignition timing, emissions systems, and transmission shifting, to ensure optimal performance, fuel efficiency, and low emissions.
Is this module ready to install out of the box?
Yes, it is. We program the module using your vehicle’s VIN before shipping. This ensures it’s flashed with the correct software for your specific vehicle. In some cases, a simple key relearn procedure may be necessary after installation to sync with your anti-theft system, which does not require special tools.
Why do you need my VIN?
Your Vehicle Identification Number (VIN) contains critical information about your car’s engine, transmission, and factory-installed options. Providing the VIN allows us to load the precise factory software and calibrations for your exact vehicle, guaranteeing compatibility and proper function.
What part numbers is this compatible with?
This module is a direct replacement for part numbers 12625455 and 12629009. Please verify the part number on your original module to ensure compatibility.
Do I need to do anything else after installing this ECM?
After physically installing the module, you may need to perform a security relearn procedure (also known as a Passlock or Passkey relearn). This typically involves a sequence of turning the key in the ignition. Additionally, for some vehicles, a Crankshaft Variation Relearn (CASE Relearn) may be needed, which requires a compatible scan tool to complete.
How can I find the part number on my current ECM?
The part number is printed on a sticker on the outside of your original engine computer. You will need to locate the ECM on your vehicle (locations vary by model, check the fitment list for common locations) and read the number directly from the label.