Restore Your Vehicle’s Core Performance and Reliability
Is your 2017 Suburban 1500, or another compatible GM vehicle, suddenly giving you headaches? Unexplained check engine lights, rough idling, stalling, or a frustrating no-start condition can often point to one critical component: the Engine Control Module (ECM). As a technician with over two decades of experience, I’ve seen firsthand how a failing ECM can mimic a dozen other problems, leading to wasted time and money on incorrect repairs. This isn’t just a part; it’s the brain of your engine, and when it falters, the entire vehicle suffers.
We take the guesswork and high dealership costs out of the equation. This genuine OEM Engine Control Module, part number 12674052, arrives at your door programmed to your vehicle’s specific Vehicle Identification Number (VIN). We load the latest, most stable software updates from GM, ensuring optimal performance, fuel efficiency, and emissions control right out of the box. This eliminates the need for an expensive trip to the dealer for initial programming, getting you closer to a solution, faster.
A Technician’s Notebook: The No-Start That Wasn’t the Starter
I remember a 2017 Silverado that came into the bay on a flatbed. The owner had already replaced the battery and starter, but it would crank all day without firing up. There were no obvious codes, just a general loss of communication (U0100) that would come and go. After checking the basics—fuel pressure and spark—we focused on the ECM. A quick voltage check at the module’s main connector showed power going in but erratic data signals coming out. We swapped in a VIN-programmed ECM, performed the VTD relearn, and the truck fired up on the first try. The original ECM had an internal failure that only showed up under load, a classic scenario that this part is designed to solve.
Common Signs of a Failing Engine Computer
If your vehicle is exhibiting any of these symptoms, a faulty ECM could be the culprit. A failing module can cause intermittent issues that are notoriously difficult to diagnose, but replacing it with a properly programmed unit is often the definitive fix.
- âś” Check Engine Light is on with codes like P0601 (Internal Control Module Memory Check Sum Error) or P0606 (ECM/PCM Processor Fault).
- âś” Vehicle will not start or has intermittent starting problems.
- âś” Engine is stalling, stuttering, or running rough for no apparent reason.
- âś” A noticeable drop in fuel economy.
- âś” Transmission shifting issues or erratic behavior.
- âś” Loss of communication with the scan tool or other modules (U-codes).
Your Straightforward Installation Guide
Installing your new 2017 Suburban 1500 Engine Control Module is a manageable job for a DIY enthusiast or a quick task for a professional. The most critical part—the programming—is already done. Just follow these steps for a successful installation.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electrical work.
- Locate the ECM: On most GM trucks and SUVs like the Suburban, the ECM is located in the engine compartment on the driver’s side, near the firewall or inner fender.
- Disconnect the Connectors: Carefully release the locking tabs on the electrical wiring harnesses and pull them straight out from the module. Avoid pulling on the wires themselves.
- Remove the Old Module: Unbolt the old ECM from its mounting bracket. Keep the hardware, as you may need it for the new installation.
- Install the New ECM: Mount the new, pre-programmed module in place and securely fasten it. Reconnect the wiring harnesses, ensuring they click firmly into place.
- Reconnect the Battery: Reattach the negative battery terminal.
- Perform Relearn Procedures: Turn the key to the ‘ON’ position. If the vehicle does not start, you must perform the Vehicle Theft Deterrent (VTD) relearn. Additional procedures like a crankshaft variation relearn may be necessary and require a compatible scan tool or access to GM’s Techline Connect system.
Will This Fit My Vehicle?
This ECM is a direct-fit replacement for a wide range of General Motors vehicles. Please verify your part number and model from the list below. This module is compatible with part numbers 12692068, 12704476, 12686382, 12674052, 12674472, and 12678815.
- Cadillac ATS (2017): 3.6L, VIN Y (LF4)
- Cadillac CTS (2017): 3.6L, VIN 8 (LF3, twin turbo) & 6.2L (supercharged)
- Cadillac Escalade / ESV (2017)
- Cadillac XTS (2017): 3.6L, VIN 8 (LF3)
- Chevrolet Corvette (2017)
- Chevrolet Silverado 1500 (2016-2018)
- Chevrolet Suburban 1500 (2017)
- Chevrolet Tahoe (2017)
- GMC Sierra 1500 / Denali 1500 (2016-2018)
- GMC Yukon / Yukon XL 1500 (2017)
Frequently Asked Questions
Do I need to do anything after I install this ECM?
Yes. While we handle the main programming to your VIN, you are responsible for performing any necessary relearn procedures. The most common is the Vehicle Theft Deterrent (VTD) relearn, which syncs the new ECM to your vehicle’s anti-theft system. This may require a professional-grade scan tool or access to GM’s TIS2WEB/Techline Connect.
How do I provide my VIN?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We cannot program and ship your module without it. Please double-check it for accuracy to ensure a perfect match.
What tools are needed for the VTD relearn?
For most of these GM vehicles, the VTD relearn cannot be done with a simple key cycle. It typically requires a bi-directional scan tool with programming capabilities or access to the official GM service software, Techline Connect. Many independent repair shops have this capability.
Is this the same as a 2017 Suburban 1500 Engine Control Module from the dealer?
This is a genuine OEM module that we program with the latest official GM calibrations, just as a dealer would. The key difference is that we program it before shipping, saving you the hassle and cost of having it done at a dealership after installation.
Will this fix my check engine light?
If the check engine light is caused by an internal failure of the original ECM (e.g., codes P0601-P0606), then yes, this part is the correct solution. However, you should always perform a complete diagnosis to ensure the codes are not being caused by other failing sensors or wiring issues.