Restore Peak Performance to Your GM Vehicle
Is your 2016 Savana 2500 Van suffering from baffling issues like a persistent check engine light, rough idling, stalling, or a complete no-start condition? These are classic signs of a failing Engine Control Module (ECM). As the central computer for your engine, a faulty ECM can disrupt everything from fuel delivery and ignition timing to transmission shifting, making your vehicle unreliable and unsafe. This isn’t just an inconvenience; for a workhorse like a Savana van, downtime means lost business. This replacement 2016 Savana 2500 Engine Control Module is the definitive solution to get your vehicle back on the road, running as the factory intended.
What sets this module apart is our commitment to a seamless repair. We don’t just ship you a part; we provide a fully programmed, plug-and-play solution. Upon purchase, simply provide us with your vehicle’s VIN. Our technicians will then flash the module with the latest, most stable General Motors software specific to your van. This critical step ensures perfect communication between the ECM and all other vehicle systems, eliminating the need for an expensive trip to the dealership for programming. You get a part that’s ready for installation right out of the box.
Case Study: A Tricky Diagnosis
A local contractor brought in his 2016 Express van—a sister vehicle to the Savana—with a frustrating intermittent stalling problem. He’d replaced the fuel pump and a few sensors, but the issue persisted, especially on hot days. His scanner showed a generic P0606 (ECM/PCM Processor Fault) code that would come and go. In my shop, I’ve seen this exact scenario dozens of times. Internal ECM components, like processors and capacitors, can fail under heat stress, causing unpredictable behavior that’s impossible to trace with conventional diagnostics. We installed a new, VIN-programmed ECM, and the problem was solved instantly. The van ran reliably, and the contractor was back to work the next day without worrying about getting stranded.
Is Your GM Vehicle Showing These Signs?
A failing ECM can manifest in numerous ways. If you’re experiencing any of the following, this module is likely the solution you need. Look out for these common indicators:
- ✔ Persistent Check Engine Light (CEL)
- ✔ Diagnostic Trouble Codes (DTCs) related to internal processor failure, such as P0601, P0603, P0606.
- ✔ Unexplained loss of engine power or poor acceleration.
- ✔ Decreased fuel efficiency.
- ✔ Engine stalling, stumbling, or misfiring.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Complete no-start or intermittent starting issues.
- ✔ Communication loss codes (U-codes) from other modules.
A Straightforward Guide to Installation
Installing your new 2016 Savana 2500 Engine Control Module is a manageable job for a DIYer with basic tools. Since the module comes pre-programmed, you skip the most complicated step.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent accidental reconnection.
- Locate the ECM: On the Savana/Express vans, the ECM is typically found in the left-hand (driver’s side) rear of the engine compartment. It’s a silver metal box with several large electrical connectors.
- Disconnect and Remove: Carefully unplug all electrical connectors from the old module. There are usually release tabs that need to be pressed or pulled. Once disconnected, unbolt the module from its mounting bracket.
- Install the New Module: Mount the new ECM onto the bracket and tighten the bolts. Reconnect all electrical connectors firmly, ensuring they click into place.
- Final Steps: Reconnect the negative battery terminal. In some cases, a security relearn procedure may be necessary. This can often be done by turning the key to the ‘ON’ position for 10-15 minutes, then off, and then starting the vehicle. Consult your owner’s manual for the specific procedure for your model.
Verified Vehicle Compatibility
This ECM is a direct replacement for a wide range of General Motors vehicles. Please verify that your vehicle and original part number are listed below. This module is compatible with part numbers 12668991, 12668866, 12668994, 12643636, 12663405, 12670335, 22819494, and 12692200.
CRUZE (12-16), ELR (14-16), EXPRESS 2500/3500 VAN (16), SILVERADO 2500/3500 (12-16), SONIC (12-16), SPARK (14-15), SUBURBAN 3500 (16), TRAX (13-16), VOLT (11-15)
GMC:
SAVANA 2500/3500 VAN (16), SIERRA 2500/3500 (12-16), SIERRA DENALI 2500/3500 (12-16)
Buick:
ENCORE (13-16)
Note: Please check the detailed fitment list in the original description or contact us with your VIN to ensure 100% compatibility. This is a partial list for readability.
Frequently Asked Questions About This ECM
Do I need to get this module programmed?
Do I need to get this module programmed?
No. This Engine Control Module comes pre-programmed to your vehicle’s specific VIN. Simply provide your VIN at checkout, and we handle the programming before shipping it to you. It arrives ready to install.
What is a VIN and where do I find it?
The VIN (Vehicle Identification Number) is a unique 17-digit code for your vehicle. You can find it on your driver’s side dashboard (visible through the windshield), on the driver’s side door jamb sticker, or on your vehicle’s registration and insurance documents.
Will this fix my specific problem?
This module is the correct fix for issues caused by a faulty ECM. While it resolves the common symptoms listed above, we always recommend a proper diagnosis by a qualified mechanic to confirm the ECM is the point of failure before ordering.
Is any additional setup required after installation?
In most cases, no. However, some GM vehicles may require a simple ‘Security Relearn’ or ‘Crankshaft Position Variation Relearn’ procedure. The security relearn can often be done without special tools, while the crank relearn may require a capable scan tool. These are standard procedures after an ECM replacement.