Is Your Workhorse Van Sidelined? Get it Back on the Job.
There’s nothing more frustrating than a reliable 2016 GMC Savana 3500 that suddenly won’t start, runs rough, or has a check engine light that just won’t go away. For a work van, downtime isn’t just an inconvenienceโit’s lost income. Often, the culprit behind these baffling electrical gremlins is a failing Engine Control Module (ECM), the central computer that manages your engine’s performance. Dealerships can charge a fortune for a replacement and programming, but you have a smarter, more direct solution right here.
This is a direct-fit Engine Control Module, part number 12663405, for your Savana 3500. The best part? We handle the programming for you. Simply provide your vehicle’s VIN during checkout, and our technicians will flash the module with the latest, most stable GM-certified software specific to your van. It arrives at your door ready for a simple, plug-and-play installation.
Are You Experiencing These Common ECM Failure Symptoms?
- โ Persistent Check Engine Light (CEL) with multiple, unrelated trouble codes.
- โ Engine cranks but refuses to start (no-start condition).
- โ Rough idling, stalling, or hesitation during acceleration.
- โ Noticeable decrease in fuel economy.
- โ Communication errors when trying to use a diagnostic scan tool.
- โ Transmission shifting issues or harsh engagement (as the ECM communicates with the TCM).
From My Bay to Your Driveway: A Real-World Scenario
“A customer’s 2016 Savana 3500 with the 6.0L V8 came into my shop last month. The driver complained of random stalling at stoplights and a check engine light with codes for an oxygen sensor and a throttle position sensor. They had already replaced both sensors, but the problem persisted. After confirming the new parts were good, my diagnostics pointed to an internal ECM fault. Instead of a costly dealer part, we installed one of these VIN-programmed modules. The van started right up, all codes were gone, and the stalling issue was completely resolved. It’s a textbook case I’ve seen dozens of times on these workhorse GM platforms.”
Why Our 2016 Savana 3500 Engine Control Module is the Smart Choice
Choosing our pre-programmed ECM means you’re getting more than just a part; you’re getting a complete, hassle-free solution designed to get you back to work quickly and affordably.
- โ VIN-Specific Programming Included: We load the correct GM software for your exact vehicle configuration, ensuring perfect compatibility and performance.
- โ No Dealer Visit Required: Save hundreds of dollars and days of downtime by avoiding the dealership’s service and programming fees.
- โ Latest Software Updates: Your module comes with the most recent GM updates, which can solve factory bugs and improve engine efficiency and longevity.
- โ Guaranteed Compatibility: This module is a direct replacement for a wide range of part numbers, ensuring a perfect fit.
Plug-and-Play Installation: No Dealer Visit Required
Installing your new ECM is straightforward. While professional installation is always recommended, here are the general steps:
- Safety First: Disconnect the negative terminal from your vehicle’s battery.
- Locate the ECM: On the 2016 Savana 3500, the ECM is typically found in the left-hand (driver’s side) rear of the engine compartment.
- Disconnect Connectors: Carefully unclip and remove the electrical wiring harnesses from the old module. Inspect the connectors for any signs of corrosion or damage.
- Swap the Module: Unbolt and remove the old ECM. Mount the new, pre-programmed module in its place.
- Reconnect Everything: Securely plug the wiring harnesses into the new ECM until they click. Reconnect the negative battery terminal.
- Final Check: Start the vehicle. The check engine light should be off, and the engine should run smoothly. No further programming is needed.
This module is a verified replacement for the following part numbers: 12668866, 12668994, 12643636, 12663405, 12670335, 22819494, 12692200. It also fits a wide variety of other GM vehicles, including the Express, Silverado, Sierra, Cruze, and Sonic. Please verify your part number or contact us to ensure compatibility.