Is Your 6.6L Duramax Workhorse Down for the Count?
There’s nothing more frustrating than a reliable work van or truck that suddenly won’t start, runs rough, or throws a persistent check engine light. For a 2013-2014 GMC Savana 2500, these issues often point directly to a failing Engine Control Module (ECM). As the brain of your 6.6L Duramax diesel engine, the ECM controls everything from fuel injection timing to transmission shifting and emissions systems. When it fails, your vehicle is effectively crippled.
Common Symptoms of a Failing GM 6.6L ECM:
- โ Complete no-start or intermittent starting problems.
- โ Check Engine Light (CEL) with communication error codes (U-codes).
- โ Poor engine performance, hesitation, or reduced power.
- โ Erratic transmission shifting or failure to shift.
- โ Specific fault codes related to injector driver circuits or sensor inputs.
Expert Pro Tip from a 20-Year Veteran Technician
Before you condemn a pricey set of injectors on your 6.6L Duramax, take a closer look at the ECM. Just last month, a 2013 Silverado 3500 was towed to my shop with multiple injector circuit codes. The previous mechanic quoted thousands for new injectors. I’ve seen this dozens of times. A quick check with a scope revealed the injector driver circuits inside the original ECM were failing, not the injectors themselves. Swapping the ECM with a correctly programmed unit like this one solved the problem instantly, saving the customer a fortune. Always verify the source of the fault before replacing expensive components.
The Direct-Fit Solution: A 2013-2014 Savana 2500 ECM Programmed to Your VIN
This isn’t just a used part pulled from a shelf. This is a complete, ready-to-install solution. We are offering a fully tested, genuine GM Engine Control Module (part number 12654088) that we will professionally program to your vehicle’s specific Vehicle Identification Number (VIN). This critical step ensures all factory settings and the latest GM software calibrations are loaded, making the installation process as smooth as possible.
Simple Steps to Get Your Vehicle Running Again:
- Place Your Order: Purchase this ECM.
- Provide Your VIN: After checkout, send us your 17-digit VIN. This is essential for programming.
- We Program & Ship: Our technicians will flash the module with the correct software for your exact vehicle configuration.
- Install the Module: Simply swap the old module with your newly programmed one.
Important Note on Security & System Relearns
As with any modern vehicle computer replacement, some final setup on the vehicle is required. After installation, if your van cranks but does not start, it’s typically due to the anti-theft system. A ‘Vehicle Theft Deterrent Relearn’ must be performed by a qualified technician using the GM TIS2Web programming system. Additionally, other procedures like a Crankshaft Variation Relearn or injector flow rate programming may be necessary depending on your vehicle’s specific needs. This is the responsibility of the installer and is standard practice for this type of repair.
Guaranteed Fitment for Your GM Truck or Van
This ECM, part number 12654088, is a direct replacement for service numbers 12654088 and 12653319. It is confirmed to fit the following vehicles equipped with the 6.6L Duramax diesel engine:
- 2013-2014 Chevrolet Express 2500/3500 Van (6.6L, Located LH rear engine compartment)
- 2013-2014 GMC Savana 2500/3500 Van (6.6L, Located LH rear engine compartment)
- 2013-2014 Chevrolet Silverado 2500/3500 Pickup (6.6L, Located LH front engine compartment)
- 2013-2014 GMC Sierra & Sierra Denali 2500/3500 Pickup (6.6L, Located LH front engine compartment)
Note for 2014 Van models: This fits vehicles without the ‘pull-ahead design’ option. Please verify your vehicle’s configuration.