Programmed 2015-2016 Tahoe ECM 12662034 | Engine Control Module for Your VIN

### Programmed 2015-2016 Tahoe ECM 12662034 \| Engine Control Module for Your VIN   ## Restore Peak Performance and Reliability to Your GM Truck or SUV If you’re dealing with a frustrating Check Engine Light, erratic engine behavior, or a no-start condition in your 2015-2016 Chevrolet Tahoe, a failing Engine Control Module (ECM) is a very likely culprit. As the ‘brain’ of your vehicle’s engine, a faulty ECM can cause a cascade of problems that are often misdiagnosed. Over my 20 years in the bay, I’ve seen countless owners spend a fortune chasing down sensor and wiring issues, only to find the root cause was the ECM itself. This module is the central command unit, and when it fails, nothing else works correctly. We take the guesswork and dealership hassle out of the equation. This is a direct-fit replacement Engine Control Module for a wide range of GM vehicles, including the **2015-2016 Tahoe ECM**. The best part? It arrives at your door pre-programmed with the latest official GM software, specifically matched to your vehicle’s VIN. This eliminates the need for expensive dealer-only programming tools, saving you significant time and money. Simply provide your VIN at checkout, and we handle the complex flashing process for you, ensuring a seamless and effective repair. #### Case Study: A Tricky Diagnosis A customer brought in a 2015 Suburban with an intermittent no-start and a flickering Check Engine Light. They had already replaced the battery and alternator. Our initial scan showed a U0100 (Lost Communication with ECM/PCM) code, which can be a real headache. We checked the main power and ground circuits to the ECM and found them to be solid. We then monitored the data stream and noticed the module would randomly drop offline. After confirming the integrity of the CAN bus wiring, we pinpointed the fault to an internal failure in the original ECM. We installed a VIN-programmed module just like this one, performed the security relearn, and the truck fired up instantly. The problem was solved, saving the customer from further diagnostic dead ends. ### Is Your Vehicle Showing These Red Flags? A failing ECM can manifest in various ways. If you’re experiencing any of the following, it might be time for a replacement: - ✔ Persistent Check Engine Light (CEL) - ✔ Stalling, stumbling, or rough idling - ✔ A significant drop in fuel economy - ✔ Engine misfires or hesitation during acceleration - ✔ The vehicle cranks but won’t start - ✔ Communication error codes, such as U0100 - ✔ Internal processor fault codes, like P0601 or P0606 - ✔ Transmission shifting problems or harsh shifts ### A Straightforward Guide to Installation Replacing the ECM on these GM trucks and SUVs is a job most DIYers can handle with basic tools. Our pre-programming service makes it even easier. 1. **Safety First:** Disconnect the negative terminal from your vehicle’s battery and secure it away from the post to prevent accidental contact. 2. **Locate the ECM:** On the 2015-2016 Tahoe and similar platforms, the ECM is typically found in the left-hand (driver’s side) front of the engine compartment, often near the battery or air filter housing. 3. **Disconnect the Connectors:** Carefully release the locking tabs on the electrical connectors and pull them straight out from the module. Inspect the connectors for any corrosion or damage. 4. **Remove the Old Module:** Unbolt the old ECM from its mounting bracket. There are usually a few bolts holding it in place. 5. **Install the New Module:** Mount your new, pre-programmed ECM onto the bracket and secure it with the bolts. Reconnect the electrical connectors, ensuring they click firmly into place. 6. **Reconnect the Battery:** Reattach the negative battery terminal and tighten it securely. 7. **Perform Security Relearn:** You will likely 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 can typically be found in your owner’s manual or online and requires no special tools. ### Verified Vehicle Compatibility This module is a direct replacement for part number **12662034** and is also compatible with several other part numbers. It is guaranteed to fit the following vehicles (please verify your specific options): **Chevrolet:** CAMARO 16 (6.2L), COLORADO 15-16 (3.6L), CORVETTE 14-16, SILVERADO 1500 14-16, SUBURBAN 15-16, TAHOE 15-16 **GMC:** CANYON 15-16 (3.6L), SIERRA 1500 14-16, SIERRA DENALI 1500 14-16, YUKON 15-16, YUKON XL 1500 15-16 **Cadillac:** ATS 14-16 (3.6L), CTS 14-16 (3.6L/6.2L), ESCALADE / ESV 15-16, XTS 14-16 (3.6L) _Note: This list is extensive. It is critical to provide your VIN upon purchase to ensure we ship the correctly programmed module for your exact vehicle configuration. This module supersedes part numbers: **12692067**, **12676230**, **12656993**, **12672537**, **12673195**, **12663391**, **12672963**, **12669318**._ ### Frequently Asked Questions **Why do I need to provide my VIN?** Your Vehicle Identification Number (VIN) allows us to program the Engine Control Module with the specific software and calibrations for your vehicle’s engine, transmission, and options. This ensures proper function and avoids compatibility issues. **Is this part ready to install out of the box?** Yes, once we program it with your VIN, it is ready for physical installation. After installing, you will only need to perform a standard vehicle security relearn procedure, which does not require a scan tool. **Where is the ECM on a 2015 Chevy Tahoe?** The ECM is located in the engine bay, on the driver’s side (LH side) near the front of the vehicle. It’s a silver metal box with several large electrical connectors. **Will this fix my check engine light?** If the check engine light is caused by a faulty ECM (e.g., codes P0601, P0606, U0100), then this replacement module will resolve the issue. It’s important to have a proper diagnosis to confirm the ECM is the point of failure. **What if my original part number is not 12662034?** This module is a direct replacement for several part numbers, including **12692067**, **12676230**, and others listed above. As long as your vehicle is on the compatibility list, this module will work once programmed to your VIN. **Do I need any special tools for the installation?** You will only need basic hand tools, such as a socket set, to remove and replace the module. No special programming equipment is required on your end. Please enter it in the payment notes and save to ensure we receive it. Orders without a VIN within our 2-business-day handling period may be canceled, as programming cannot proceed without it. ### Shipping - **Processing Time:** Reliably shipped within 2-3 business days. ### Warranty Enjoy peace of mind with a **one-year replacement warranty** on this part, effective from the date you receive it. Labor costs are not covered. If the part fails within the warranty period, we’ll replace it with a comparable unit or refund your purchase price, ensuring a hassle-free experience. **Return Address:** **Highway71autoparts** **9131 Highway 71 NE** **Spicer, MN, 56288**

• Country of Origin: United States
• Manufacturer Part Number: 12662034
• Manufacturer Warranty: 1 Year
• Superseded Part Number: 12656993, 12662034, 12663391, 12669318, 12672963, 12673195, 12676230, 12672537
• Genuine OEM: Yes
• Interchange Part Number: 590-08396
• PartNumber: 590
• Model: TAHOE
• Year: 2016
• Brand: GM
• superseded-part-number: 12676230 12656993 12662034 12672537 12673195,12663391
• Hardware Type: E92