Restore Peak Performance to Your GM Vehicle
Is your 2010-2014 Chevy Express or GMC Savana van running rough, stalling, or displaying a persistent Check Engine Light? Are you experiencing frustrating issues like poor fuel economy, hesitation, or a no-start condition? These are classic symptoms of a failing Engine Control Module (ECM), the central computer that manages your vehicle’s engine performance, fuel delivery, and emissions systems. Don’t let a faulty module keep your workhorse off the road. This direct-fit Engine Control Module, part number 12635043, is the reliable solution to get your van or truck running like new again.
From the Diagnostic Bay
We had a 2012 Silverado 1500 with the 4.3L V6 come into the shop with a bizarre, intermittent stalling issue. The owner had already replaced the fuel pump and a couple of sensors, chasing the problem with no luck. The codes were all over the place—misfires, O2 sensor faults, communication errors. After hours of diagnostics, we traced the issue back to the ECM. The internal processor was failing under heat, causing it to send erratic signals to the rest of the engine components. We installed one of these pre-programmed modules, matched to the truck’s VIN, and it fired right up and ran perfectly. It’s a great reminder that sometimes the ‘brain’ is the source of the problem, not the ‘body’.
Is Your Engine Control Module Failing?
A failing ECM can manifest in numerous ways, often mimicking other component failures. This can lead to costly and time-consuming misdiagnoses. If your vehicle is experiencing any of the following, a faulty ECM could be the culprit:
- ✔ Persistent and illuminated Check Engine Light (CEL)
- ✔ Engine stalling, stumbling, or hesitating during acceleration
- ✔ Noticeable decrease in fuel efficiency
- ✔ Rough or erratic idling
- ✔ Complete no-start or difficult starting conditions
- ✔ Transmission shifting problems or harsh shifts
- ✔ Communication errors with diagnostic scan tools
The Plug-and-Play Solution: A Pre-Programmed 2010-2014 Express 1500 ECM
Replacing an ECM isn’t just about swapping hardware. The module must be programmed with your vehicle’s specific Vehicle Identification Number (VIN) and equipped with the latest factory software to function correctly. Our service eliminates the need for an expensive trip to the dealership. When you purchase this 2010-2014 Express 1500 ECM, we handle the critical programming for you. Simply provide us with your VIN during checkout, and our technicians will flash the module with the most current GM-certified software for your exact vehicle configuration. This ensures seamless integration and optimal performance right out of the box.
Guaranteed Fitment and Compatibility
This Engine Control Module is a direct replacement for several original equipment service numbers, ensuring broad compatibility. It is guaranteed to fit and function in the following vehicles equipped with the 4.3L V6 engine:
- 2010-2014 Chevrolet Express 1500 Van (Located in LH rear engine compartment)
- 2010-2014 GMC Savana 1500 Van (Located in LH rear engine compartment)
- 2010-2013 Chevrolet Silverado 1500 Pickup (Located at LH front under battery)
- 2010-2013 GMC Sierra 1500 Pickup (Located at LH front under battery)
This module is a direct replacement for the following service numbers: 12635043, 12639471, and 12653246. Please verify your part number or contact us with your VIN to confirm compatibility.
Why Choose Our Programmed ECM?
Choosing our professionally programmed 2010-2014 Express 1500 ECM means you’re getting more than just a part; you’re getting a complete, ready-to-install solution. We take the guesswork and additional expense out of the repair process. Each unit is meticulously prepared to meet or exceed original factory specifications, providing a reliable and long-lasting fix for your vehicle’s engine management issues. Restore your vehicle’s drivability, fuel economy, and reliability today.
Frequently Asked Questions
Do I need to do any programming or flashing after I receive this ECM?
No. This ECM arrives at your door fully programmed to your vehicle’s specific VIN with the latest GM software updates. It is a plug-and-play installation. You will not need to visit a dealer or mechanic for additional programming.
Where do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We cannot ship the module until we have this information to complete the programming.
What tools are needed for installation?
Installation typically requires basic hand tools, such as a socket set and ratchet. It’s also highly recommended to disconnect the vehicle’s battery before starting the replacement process to prevent any electrical damage.
Is this a direct replacement for my original part?
Yes, this module is designed to be a direct-fit replacement for the original ECM in the specified vehicles. It will mount in the factory location and connect to the existing wiring harnesses without any modifications.
Will this fix my Check Engine Light?
If the Check Engine Light and other symptoms are caused by a faulty ECM, this replacement part will resolve the issue. We always recommend having a professional diagnosis performed to confirm the ECM is the point of failure before ordering.