Are you tired of dealing with a malfunctioning engine control module in your 2017-2018 Sierra Denali 1500? Do you dread the thought of costly repairs and dealership visits? Look no further! Our pre-programmed 12678815 engine control module is designed to restore your vehicle’s original performance and reliability.
- Restores original engine control module function for smooth operation.
- OEM-equivalent build ensures long-lasting reliability.
- Pre-programmed to your VIN—no dealership visits needed.
- Includes 1-year warranty for peace of mind.
- Easy DIY install with basic tools (tips: disconnect battery first to avoid shorts).
- Outperforms worn OEM without modifications.
- Compatible with Sierra Denali 1500 variants (engine options like 6.2L).
No more sluggish acceleration on highways or frustrating check engine lights. Our pre-programmed engine control module ensures seamless performance and efficient fuel consumption. Unlike failing factory modules that trigger codes, our replacement restores your vehicle’s original efficiency.
Pairing this module with a diagnostic tool is recommended for optimal results. Learn how to do it below. With our pre-programmed engine control module, you’ll enjoy reliable driving without the hassle of dealership visits or costly repairs.
Important Installation Notes
Upon installation, if your vehicle does not start, a theft relearn will be required using the GM programming system Tis2web/Techline Connect. This is the responsibility of the end-user. Please note that it’s also the buyer’s responsibility to perform any necessary relearns or setup procedures, such as injector setup and crankshaft variation relearn.
Don’t let a faulty engine control module hold you back from enjoying your Sierra Denali 1500. Order your pre-programmed 12678815 engine control module today and rediscover reliable driving!
This part will fit these makes and models with these options
2017-2018 Sierra Denali 1500 (LH front engine compartment), ID 12678815. Also fits other GM models, including Escalade, Tahoe, Yukon, Corvette, and more (see base description for details).