Restore Your Van’s Performance and Reliability
Is your 2016 Savana 3500 van running rough, stalling unexpectedly, or showing a persistent check engine light? A faulty Engine Control Module (ECM) is often the culprit behind these frustrating and costly issues. As the brain of your vehicle’s engine, a failing ECM can disrupt everything from fuel delivery and ignition timing to transmission shifting, leaving your workhorse stranded. This replacement Engine Control Module is the definitive solution, arriving pre-programmed with the latest GM software specific to your van’s VIN. This eliminates the need for an expensive trip to the dealership for programming, getting you back on the road and back to business quickly and efficiently.
From the Diagnostic Bay: The Intermittent No-Start Nightmare
I once had a local delivery company bring in their 2016 Savana 3500. The driver complained of random no-start conditions. It would be fine for days, then refuse to crank. We checked the battery, starter, and ignition switch—all tested perfectly. No clear diagnostic codes were stored, just a few random communication errors. After hours of tracing wires, we noticed the 5-volt reference signal from the ECM would occasionally drop out. On a hunch, we gently tapped the ECM, and the engine immediately stalled. The problem was internal to the module, likely caused by years of heat and vibration in the engine bay. Replacing it with a VIN-programmed unit like this one solved the problem permanently. It’s a classic failure mode I’ve seen on dozens of these work vans.
Is Your Savana Van Showing These Signs?
A failing ECM can manifest in numerous ways. If you’re experiencing any of the following, it’s a strong indicator that your vehicle’s computer needs attention. Look out for these common symptoms and associated Diagnostic Trouble Codes (DTCs):
- ✔ Check Engine Light is on with no obvious cause.
- ✔ Engine cranks but refuses to start.
- ✔ Noticeable decrease in fuel economy.
- ✔ Rough idling, stalling, or hesitation during acceleration.
- ✔ Harsh or erratic automatic transmission shifting.
- ✔ Stored trouble codes such as P0601 (Internal Control Module Memory Check Sum Error), P0606 (ECM/PCM Processor Fault), or U0100 (Lost Communication With ECM/PCM).
A Straightforward Guide to Installation
Installing your new 2016 Savana 3500 Engine Control Module is a manageable job for a DIYer with basic tools. Our pre-programmed module simplifies the process significantly. Follow these steps carefully:
- 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 2016 Savana/Express vans, the ECM is typically located in the rear of the engine compartment on the driver’s side, mounted to the firewall or inner fender.
- Disconnect Connectors: Carefully release the locking tabs on the electrical wiring harnesses and unplug them from the old module. Inspect the connectors for any corrosion or damage.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket. Keep the hardware as you will reuse it.
- Install the New Module: Mount your new, pre-programmed ECM onto the bracket and secure it with the original hardware.
- Reconnect Everything: Firmly plug the wiring harnesses back into the new module until they click into place. Reconnect the negative battery terminal.
- Perform Security Relearn: Most GM vehicles require a simple security relearn procedure. Turn the key to the ‘ON’ position for 10-15 minutes (do not start the engine). The ‘Security’ light should turn off. Turn the key off for 10 seconds, then start the vehicle. It’s now ready to drive.
Verified Vehicle Compatibility
This ECM, part number 12692200, is a direct replacement for several original equipment part numbers, including 12668866, 12668994, 12643636, and more. While this listing is focused on the 2016 Savana 3500 Engine Control Module, it is also compatible with a wide range of other GM vehicles. Please verify your part number and specific model from the list below:
SILVERADO/SIERRA 2500 & 3500 PICKUPS (2012-2016): 6.0L
SIERRA DENALI 2500/3500 (2012-2016): 6.0L
SUBURBAN 3500 (2016)
CRUZE (2012-2016): Including 1.4L and gasoline models
SONIC (2012-2016): Including 1.4L models
TRAX (2013-2016): 1.4L
ENCORE (2013-2016): 1.4L
VOLT (2011-2015): Gasoline engine
ELR (2014-2016): Gasoline engine
SPARK (2014-2015): Gasoline model
Note: Always match your original part number or provide your VIN to ensure perfect compatibility.
Frequently Asked Questions
How do I provide my VIN for programming?
After you complete your purchase, simply send us a message with your vehicle’s 17-digit Vehicle Identification Number (VIN). We will program the module with the latest GM software matched to your specific vehicle before shipping.
Is this module truly plug-and-play?
Yes, because we program it to your VIN, it is ready for installation right out of the box. The only additional step required for most GM vehicles is a simple security relearn procedure, which takes about 10-15 minutes and requires no special tools.
Will this fix my specific problem?
This module will resolve issues directly caused by a failing ECM, such as internal processor faults (P0606), memory errors (P0601), and other related symptoms. It’s crucial to ensure your vehicle has been properly diagnosed, as other faulty sensors or wiring issues can sometimes mimic ECM failure.
What if my original part number is slightly different?
This module replaces a range of part numbers (like 12668866, 12643636, etc.). As long as your vehicle model and year are on our compatibility list, this unit will function correctly once programmed to your VIN. The programming ensures it works perfectly for your application.
Do I need to send my old ECM back?
No core charge or return is required for this part. You can keep or responsibly dispose of your old module.