Is Your GM Diesel Truck or Van Running Rough?
If your 2006-2007 Silverado, Sierra, Savana, or Express van with the 6.6L Duramax LLY diesel engine is experiencing perplexing issues like a persistent check engine light, no-start conditions, or a sudden loss of power, the root cause might be a failing Engine Control Module (ECM). The ECM is the master computer of your engine, responsible for precisely managing fuel injection, turbo boost, glow plug operation, and emissions systems. When it begins to fail, it can create a cascade of problems that are often difficult to diagnose, leading to costly and unnecessary repairs. This replacement ECM, part number 12606126, is the definitive solution to restore your vehicle’s performance and reliability.
From the Diagnostic Bay
We had a 2006 Silverado 2500 HD towed in that had every shop in town stumped. The owner had already replaced all eight injectors—a hugely expensive job—chasing an intermittent rough idle and a P0201 injector circuit code. The truck would run fine for a day, then suddenly start missing. After hours of wiring diagnostics, we swapped in a known-good ECM. The problem vanished instantly. The original module had an internal failure in the injector driver circuit that only acted up when it got hot. This pre-programmed ECM would have saved that customer thousands of dollars and weeks of downtime.
Why Choose Our Programmed 2006-2007 Savana 2500 ECM?
Getting your heavy-duty truck or work van back in service is critical. We make the process simple and efficient. Unlike a generic module from a parts store, this ECM comes fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). This means we load the latest GM-certified software and calibrations directly onto the module before it ships. This critical step ensures that the ECM communicates perfectly with your truck’s other systems, like the Transmission Control Module (TCM) and Body Control Module (BCM), right out of the box. You avoid expensive trips to the dealership for programming, saving you both time and money.
Common Symptoms of a Failing GM Diesel ECM
- ✔ Check Engine Light (CEL) is on with communication-related codes (U-codes) or specific injector circuit faults.
- ✔ Engine cranks but will not start.
- ✔ Intermittent stalling or shutting off while driving.
- ✔ Noticeable decrease in fuel economy and engine power.
- ✔ Rough or unstable idle.
- ✔ The cooling fans run constantly, even when the engine is cold.
- ✔ Communication issues with diagnostic scan tools.
- ✔ Problems with the automatic transmission shifting correctly.
Installation and Compatibility
This module is a direct-fit replacement for a wide range of GM diesel vehicles. The physical installation is straightforward, typically located in the engine bay either under the battery tray or on the driver’s side of the engine compartment. Once you provide us with your VIN during the checkout process, we handle all the complex programming. After installation, you may need to perform a simple security relearn procedure, which can often be done without special tools. In some cases, a Crankshaft Position Sensor Relearn (CASE relearn) may be required, which can be completed with a capable OBD2 scan tool.
This unit is a direct replacement for the following part numbers: 19260753, 12588335, 12606126, 12606127, 12603623, 12604137, and YNAY. It is designed to fit the following vehicles with the 6.6L LLY Duramax diesel engine (8th digit of VIN is ‘2’):
- 2006-2007 Chevrolet Silverado 2500/3500
- 2006-2007 GMC Sierra 2500/3500
- 2006-2007 Chevrolet Express 2500/3500
- 2006-2007 GMC Savana 2500/3500
Don’t let a faulty computer keep your powerful diesel truck off the road. Order this pre-programmed 2006-2007 Savana 2500 ECM today and restore the dependable performance you rely on.
Frequently Asked Questions
Do I need to program this ECM?
No. We program the module with the latest GM software using the VIN you provide before we ship it to you. This makes the installation process much simpler and eliminates the need for a trip to the dealership.
What is a CASE relearn and will I need to do one?
A CASE (Crankshaft Angle Sensor Error) relearn synchronizes the ECM with the crankshaft position sensor. After installing a new ECM, this procedure is often necessary to prevent a P0315 trouble code. It can be performed with most professional-grade bidirectional scan tools.
Where is the ECM located on my truck or van?
For Silverado and Sierra pickups, the ECM is typically located on the driver’s side, under the battery tray. For Express and Savana vans, it is usually found in the engine compartment on the driver’s side, near the rear of the engine.
Will this fix my truck’s no-start problem?
While a failed ECM is a common cause of a ‘crank no-start’ condition, it’s important to properly diagnose the issue. Other potential causes include problems with the fuel system, FICM (Fuel Injection Control Module), or crankshaft/camshaft sensors. However, if you have diagnosed a bad ECM, this part is the correct solution.
Does this part replace other part numbers?
Yes, this ECM is a direct replacement for several part numbers, including 19260753, 12588335, 12606127, 19260753, 12603623, 12604137, and YNAY, ensuring broad compatibility.