Restore Peak Performance to Your GM Vehicle
If you’re dealing with frustrating engine problems in your 2015-2016 Suburban 1500—like a persistent check engine light, poor fuel economy, or unpredictable stalling—the root cause is often a failing Engine Control Module (ECM). As the central computer of your vehicle, a faulty ECM can create a cascade of issues that are difficult to diagnose. This isn’t just an inconvenience; it affects your vehicle’s reliability and safety. We offer a dependable, straightforward solution: a replacement ECM, part number 12669318, professionally programmed to your vehicle’s specific VIN.
Forget the hassle and high cost of a dealership visit. We handle the complex programming for you. Simply provide your Vehicle Identification Number (VIN) after purchase, and we’ll flash the module with the latest official GM software updates. This ensures that when the part arrives, it’s ready for a direct installation, restoring the precise engine management, fuel delivery, and emissions control your vehicle had when it left the factory. This is the definitive fix for a wide range of electronic gremlins.
From the Diagnostic Bay
I remember a 2015 Tahoe that came into my shop with a maddeningly intermittent no-start condition. The owner had already replaced the battery and starter. Scans showed a slew of communication codes (U-codes) that would appear and then vanish. After checking the main power and ground circuits to the ECM, we found they were solid. On a hunch, we monitored the 5-volt reference signal from the ECM to various sensors. We noticed it would occasionally drop out, causing the engine to die instantly. This pointed directly to an internal failure within the ECM. We installed a VIN-programmed module just like this one, and the problem was solved permanently. It’s a classic example of how a failing ECM can mimic other component failures.
Is Your Vehicle Showing These Signs of ECM Failure?
- âś” Check Engine Light is illuminated with codes like P0601 (Internal Control Module Memory Check Sum Error) or P0606 (ECM/PCM Processor Fault).
- âś” Your engine cranks but refuses to start.
- âś” Unexplained drops in fuel efficiency.
- âś” The engine stalls, hesitates, or runs rough for no apparent reason.
- âś” Loss of communication with other vehicle modules, often triggering various warning lights on the dash (e.g., U0100).
- âś” Automatic transmission shifts erratically or harshly.
A Straightforward Guide to Installation
Installing your replacement 2015-2016 Suburban 1500 ECM is a manageable job for a confident DIYer. Taking your time and following these steps will ensure a smooth process.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes to allow the system to fully discharge.
- Locate the ECM: On most GM trucks and SUVs from this era, including the Suburban, the ECM is found in the front of the engine compartment on the driver’s side, near the battery or air filter housing.
- Disconnect Wiring: Carefully release the locking tabs on the electrical connectors. There are typically two or three large multi-pin connectors. Never force them; they should unlatch and pull away smoothly. Inspect the pins 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 for the new module.
- Install the New ECM: Mount your new, pre-programmed ECM onto the bracket and secure it with the original hardware.
- Reconnect Everything: Firmly plug the wiring harnesses into the new module. You should hear or feel a click as they lock into place. Reconnect the negative battery terminal.
- Final Steps: In some cases, a security or anti-theft relearn procedure may be required. This can typically be done without special tools by cycling the key. Consult your vehicle’s service information for specific steps if needed. Start the vehicle and check for proper operation.
Verified Vehicle Compatibility
This module is a direct replacement for part number 12669318 and is also compatible with several other GM part numbers, including 12692067, 12676230, 12656993, 12662034, 12672537, 12673195, 12663391, and 12672963. It fits a wide range of GM vehicles. Please verify your model and options below:
- Cadillac ATS: 2014 (ID 12656993), 2015 (3.6L), 2016 (3.6L, VIN Y)
- Cadillac CTS: 2014-2015 (Sdn, 3.6L), 2016 (3.6L VIN 8, 6.2L)
- Cadillac Escalade / ESV: 2015-2016
- Cadillac XTS: 2014-2016 (3.6L, VIN 8)
- Chevrolet Camaro: 2016 (6.2L)
- Chevrolet Colorado: 2015-2016 (3.6L)
- Chevrolet Corvette: 2014-2016
- Chevrolet Silverado 1500: 2014-2015, 2016 (Check ID: 12662034, 12672537, 12673195)
- Chevrolet Suburban 1500: 2015-2016
- Chevrolet Tahoe: 2015-2016
- GMC Canyon: 2015-2016 (3.6L)
- GMC Sierra 1500 / Denali 1500: 2014-2015, 2016 (Check ID: 12662034, 12672537, 12673195)
- GMC Yukon / Yukon XL 1500: 2015-2016
Frequently Asked Questions
Do I need to get this module programmed by a dealer?
No. We program the module to your vehicle’s VIN before shipping it to you. It arrives ready for installation, saving you time and money.
What information do you need from me?
After you complete your purchase, you will need to provide us with your 17-digit Vehicle Identification Number (VIN). This is essential for us to load the correct software for your specific vehicle.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the original ECM (common codes P0601-P0606), then yes, this part is the correct fix. However, you should always ensure other potential issues (sensors, wiring) have been ruled out.
Is this a difficult part to install myself?
For someone with basic mechanical skills and tools, this is a very manageable installation. It’s typically a bolt-off, bolt-on process. Please follow our installation guide and prioritize safety by disconnecting the battery first.
My original part number is slightly different but on your list. Will this work?
Yes. Manufacturers often supersede part numbers. Our module is compatible with all the part numbers listed in the description. The key is the VIN-specific programming we provide, which makes it correct for your vehicle.