Is your 2011 Sierra, Silverado, or Cruze suffering from frustrating and hard-to-diagnose issues? A faulty Engine Control Module (ECM) can bring your vehicle to a standstill, causing everything from a no-start condition to poor performance and a persistent check engine light. This isn’t just an inconvenienceโit’s downtime that costs you time and money. Get back on the road with confidence with this fully programmed engine computer, designed to be a direct, hassle-free solution for your vehicle.
Common Symptoms & Your Solution
If you’re experiencing any of the following, a failing ECM is the likely culprit. This module is the definitive solution for symptoms such as:
- Complete no-start or intermittent starting issues
- Check Engine Light (CEL) with communication-related codes (e.g., U0100)
- Internal module failure codes like P0601 or P0606
- Unexplained stalling or rough idling
- Poor fuel economy and reduced engine power
- Erratic automatic transmission shifting
- Failure to communicate with diagnostic scan tools
Instead of paying for expensive diagnostics and programming fees at a dealership, this Programmed 12656958 Engine Computer arrives ready for installation. We use your vehicle’s VIN to flash the module with the latest, most stable software updates from GM, ensuring it works seamlessly with your specific configuration right out of the box.
Features & Benefits
- โ Plug & Play Installation: This unit is pre-programmed to your vehicle’s VIN. No expensive dealer trip or special tools are required for programming.
- โ Restored Engine Performance: Loaded with the latest GM software updates to ensure optimal fuel efficiency, smooth shifting, and reliable power delivery.
- โ Guaranteed Compatibility: By using your VIN, we ensure this ECM is a perfect match for your vehicle’s options and systems, eliminating guesswork.
- โ Cost-Effective Repair: Save hundreds of dollars compared to the cost of a new module and programming services at a dealership.
- โ Peace of Mind: This unit is backed by our one-year replacement warranty.
An Expert’s Note: Back on the Job in No Time
“We had a contractor bring in his 2011 Silverado 2500 work truck that was completely dead in the water. It wouldn’t start, and his regular mechanic was stumped. After diagnosing an internal ECM failure, the dealership quoted him over a week of downtime and a massive bill. We ordered this Programmed 12656958 Engine Computer for him. It arrived two days later, we installed it in under an hour, and the truck fired right up. He was back on the job site the same afternoon, saving him from a week of lost income. For a work truck, that’s not just a repairโit’s a business-saver.”
Frequently Asked Questions
What do I need to do after I purchase this ECM?
After you complete your purchase, you must provide us with your vehicle’s 17-digit VIN (Vehicle Identification Number). We need this to program the engine computer specifically for your truck or car before we can ship it.
Is any additional programming required once I install it?
No. This ECM is a plug-and-play solution. Because we flash it with your VIN and the latest GM software, it will not require any further programming. In some cases, a security or crank relearn procedure may be necessary, which can be done with many common scan tools.
How can I be sure my old ECM is the problem?
While professional diagnosis is always recommended, common signs of a bad ECM include a no-start condition where the engine still cranks, communication error codes (U-codes), internal processor fault codes (P0601-P0606), or multiple unrelated sensor codes appearing at once.
Will this computer fit my vehicle?
This module is compatible with the makes and models listed in the fitment chart, including the 2011 Sierra 2500/3500, Silverado 2500/3500, and Cruze. Providing your VIN guarantees we program it correctly for your exact vehicle configuration.
Where is the VIN located on my vehicle?
You can typically find your VIN on a sticker inside the driver’s side door jamb, on a metal plate on the driver’s side of the dashboard (visible through the windshield), or on your vehicle’s registration and insurance documents.