Restore Peak Performance to Your 2015-2016 Chevy Suburban 1500
If you’re dealing with frustrating engine problems like stalling, poor fuel economy, a persistent check engine light, or erratic shifting, a failing Engine Control Module (ECM) is often the culprit. As the brain of your vehicle, the ECM controls everything from fuel mixture and ignition timing to transmission shift points. When it fails, it can cause a cascade of issues that leave your reliable Suburban feeling unpredictable. This isn’t just an inconvenience; it’s a critical component for your vehicle’s health and safety.
This is a direct-fit, VIN-programmed 2015-2016 Suburban 1500 ECM that arrives ready for installation. We take the hassle and high cost of dealership programming out of the equation. Simply provide your vehicle’s VIN at checkout, and our technicians will flash the module with the latest GM-certified software specific to your SUV. This ensures seamless communication between all your vehicle’s systems and restores the factory performance you expect.
From the Diagnostic Bay: A Common GM Truck Scenario
Just last week, a 2015 Silverado with the same platform as your Suburban came into my shop. The owner was at his wit’s end. He had random misfires (P0300), a harsh 1-2 shift, and the scariest part—the engine would occasionally shut off at a stop light. He’d already replaced spark plugs and a coil pack with no success. After hooking up my scan tool, I saw the tell-tale sign: a P0606 (ECM Processor Fault) code. These internal processor faults are non-repairable. We installed one of these VIN-programmed modules, performed the simple security relearn, and the truck ran like it just rolled off the assembly line. This is the definitive fix for that exact problem set.
Is Your Suburban Exhibiting These Symptoms?
A faulty ECM can manifest in many ways. If you’re experiencing any of the following, this module is the likely solution. Look out for these common signs and diagnostic trouble codes (DTCs):
- ✔ Check Engine Light is on with no clear cause
- ✔ Engine stalling, stumbling, or hesitating during acceleration
- ✔ Noticeable decrease in fuel mileage
- ✔ Harsh or erratic automatic transmission shifting
- ✔ Vehicle won’t start, or has difficulty starting (cranks but no-start)
- ✔ Communication errors with your scan tool
- ✔ Stored trouble codes like P0601, P0602, P0606, or U0100
A Straightforward Guide to Installation
Replacing the ECM on your Suburban is a manageable job for a DIYer with basic tools. Because we handle the programming, you skip the most complicated step. Follow this general process to get your vehicle back on the road.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes for the system capacitors to discharge.
- Locate the ECM: On your 2015-2016 Suburban, the ECM is typically found in the front left (driver’s side) of the engine compartment, mounted to the fender or a bracket.
- Disconnect the Harnesses: Carefully release the locking tabs on the electrical connectors and pull them straight out from the module. Never force them. Inspect the pins for any corrosion or damage.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket. There are usually a few 10mm bolts holding it in place.
- Install the New Module: Mount your new, pre-programmed ECM onto the bracket and secure it with the bolts.
- Reconnect Everything: Plug the electrical harnesses back into the new ECM until they click securely into place. Reconnect the negative battery terminal.
- Perform Security Relearn: You will need to perform a simple security relearn procedure (often called a ‘key-on/key-off’ cycle) to sync the new ECM with your vehicle’s anti-theft system. This procedure typically takes about 30 minutes and does not require a special scan tool. Instructions are readily available online or can be provided upon request.
Verified Vehicle Compatibility
This Engine Control Module is a guaranteed fit for a wide range of GM trucks, SUVs, and cars. Please confirm your vehicle is on this list and that the part number matches one of the compatible numbers below. This module, part number 12663391, directly replaces part numbers: 12692067, 12676230, 12656993, 12662034, 12672537, 12673195, 12672963, and 12669318.
- SUBURBAN 1500: 2015-2016 (LH front engine compartment)
- TAHOE: 2015-2016 (LH front engine compartment)
- SILVERADO 1500 PICKUP: 2014-2016 (LH front engine compartment)
- SIERRA 1500 PICKUP: 2014-2016 (LH front engine compartment)
- SIERRA DENALI 1500: 2014-2016 (LH front engine compartment)
- YUKON / YUKON XL 1500: 2015-2016 (LH front engine compartment)
- ESCALADE / ESCALADE ESV: 2015-2016 (LH front engine compartment)
- CAMARO: 2016 (6.2L)
- CORVETTE: 2014-2016 (RH cowl under dash)
- ATS: 2014-2016 (3.6L)
- CTS: 2014-2016 (3.6L or 6.2L)
- XTS: 2014-2016 (3.6L, LF3)
- COLORADO / CANYON: 2015-2016 (3.6L, RH firewall)
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) is essential. It allows our technicians to load the exact, correct software calibration from GM for your Suburban’s specific engine, transmission, and options. This ensures your new 2015-2016 Suburban 1500 ECM works perfectly right out of the box.
Is this a plug-and-play part?
Almost. The module arrives pre-programmed to your VIN. After the physical installation, you only need to perform a simple security relearn procedure, which pairs the new ECM to your keys and anti-theft system. This process does not require a dealer scan tool and can be done in your driveway.
Do I need to send my old ECM back (core charge)?
No, there is no core charge or need to return your old, faulty module. You can keep it or dispose of it responsibly.
Will this fix my transmission shifting problems?
In many cases, yes. The ECM works in tandem with the Transmission Control Module (TCM) to manage shift strategy. If the ECM is sending faulty data, it can cause harsh or erratic shifting. Replacing a bad ECM often resolves these transmission-related symptoms.
What if I have modifications on my vehicle?
This module is programmed with standard, factory GM software. It is intended for vehicles with stock or near-stock configurations and is not designed to accommodate significant aftermarket engine or powertrain modifications.