Is Your Work Van Unreliable? Get Back on the Road Fast.
As a mechanic with over two decades of experience, I know that a down work van like your 2016 Savana 3500 isn’t just an inconvenienceโit’s costing you money. When the Engine Control Module (ECM) starts to fail, you’re often left chasing ghosts: intermittent stalling at intersections, a persistent check engine light that won’t clear, terrible fuel mileage, or a frustrating no-start condition that leaves you stranded. These aren’t just minor annoyances; they are symptoms of a failing engine computer, the very brain of your vehicle’s operation.
The Simple, Reliable Solution: A Pre-Programmed 2016 Savana 3500 ECM
Forget expensive dealership appointments and towing fees. This Engine Control Module, part number 12668991, is the direct-fit, hassle-free solution. We take the guesswork out of the repair by professionally programming the module to your van’s specific Vehicle Identification Number (VIN) before we ship it. This means it arrives at your door loaded with the latest GM factory software updates, ready for a straightforward installation. You are getting a reliable, tested component that restores your vehicle’s original performance and efficiency.
Real-World Shop Story
“A customer’s 2016 Savana 3500 came in last month with a classic case of ECM failure. It was a plumber’s van, and he was losing jobs because it would randomly refuse to start after being driven. His scanner showed a slew of communication errors. Instead of a multi-day stay at the dealer, we installed one of our VIN-programmed modules. The entire job, from disconnecting the battery to starting the engine, took less than an hour. He was back on the road, and the van has run flawlessly since. That’s the difference a reliable, pre-programmed part makes.”
Common Symptoms of a Failing ECM:
- โ Persistent Check Engine Light (CEL)
- โ Engine stalling or shutting off while driving
- โ No-start or hard-starting conditions
- โ Noticeable drop in fuel economy
- โ Rough or erratic idling
- โ Transmission shifting problems
- โ Communication errors with diagnostic scan tools
Plug-and-Play Installation: No Dealer Visit Required
Installing your new ECM is a simple process that you can do right in your own driveway. Just follow these steps:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the ECM: On the 2016 Savana/Express vans, the ECM is typically located in the rear of the engine compartment on the driver’s side.
- Disconnect Connectors: Carefully unclip the wiring harness connectors from the old module. Inspect the pins for any corrosion or damage.
- Remove Old Module: Unbolt the old ECM from its mounting bracket and remove it from the vehicle.
- Install New Module: Bolt the new, pre-programmed ECM into place.
- Reconnect Everything: Firmly plug the wiring harnesses into the new module until they click. Reconnect the negative battery terminal.
- Final Steps: The vehicle may require a security relearn procedure, which is a simple process of cycling the key and can be done without any special tools. Your van is now ready to start.
Guaranteed Compatibility
This module is a direct replacement for a wide range of GM vehicles and part numbers. Simply provide your VIN at checkout to ensure perfect compatibility. This unit interchanges with the following part numbers: 12668866, 12668994, 12643636, 12663405, 12670335, 22819494, and 12692200. It is the correct fit for many GM models including the Express, Silverado, Sierra, Cruze, Sonic, and more, ensuring a perfect match for your vehicle’s specific configuration.