Bad Box

March 31, 2020
This bulletin applies to 2018 GMC Canyon trucks equipped with a 2.5L engine and Terrain vehicles equipped with a 2.0L or 1.5L engine. On some vehicles, an electrical connection in the circuit board may fail in the engine control module.

This bulletin applies to 2018 GMC Canyon trucks equipped with a 2.5L engine and Terrain vehicles equipped with a 2.0L or 1.5L engine. On some vehicles, an electrical connection in the circuit board may fail in the engine control module.

If this occurs, a MIL may illuminate. Depending on the VIN, the replacement ECM will be P/N 12669908 or 12687467. The issue may also involve 2018 Buick LaCrosse, Cadillac ATS/CTS/CT6, Chevy Camaro/Colorado/Cruze/Equinox/Malibu/Tracker and Volt vehicles.

Open TIS on the computer used to program the vehicle. Select and start SPS. Select settings. Select the warranty claim code tab. After replacing the ECM, module programming is required.

Ensure the programming tool is equipped with the latest software and is securely connected to the data link connector. Stable voltage is critical. When required install the EL-49642 SPS programming support tool to maintain system voltage. If not available, connect a fully charged 12V jumper or booster pack, disconnected from an AC voltage supply. Do not connect a battery charger.

Turn off or disable systems that may place a load on the battery, such as interior lights, HVAC, radio, etc. Clear DTCs after programming is complete.

Sponsored Recommendations

Tesla service, repair, and diagnostics

Keep update-to-date on how to maintain your customer's Tesla vehicles.

Tool Review: Ascot Supply 3/4" Drive 600 ft-lbs Split Beam Torque Wrench, No. 168-00600

Reviewed by Eric Moore, manager at DeMary Truck in Columbus, Ohio.

Diagnosing an engine misfire

Recognizing a misfire is the easy part; the challenge is determining its cause.

The ‘Iron Giant’

This technician spent two and half years putting together his ‘giant’ of a toolbox setup.

Voice Your Opinion!

To join the conversation, and become an exclusive member of Vehicle Service Pros, create an account today!