GMC Terrain: Reporting Safety Defects / Reporting Safety Defects to General Motors

In addition to notifying NHTSA (or Transport Canada) in a situation like this, notify General Motors.

In the U.S., call 1-800-GMC-8782 (1-800-462-8782), or write:

GMC Customer Assistance Center

P.O. Box 33172

Detroit, MI 48232-5172

In Canada, call 1-800-263-3777 (English) or 1-800-263-7854 (French), or write:

General Motors of Canada Company

Customer Care Centre, Mail Code:

CA1-163-005

1908 Colonel Sam Drive

Oshawa, Ontario L1H 8P7

In Mexico, call 01-800-466-0812 or 01-800-466-0801.

In other Central America and Caribbean Countries, call 52-722-236-0680.

    Reporting Safety Defects to the Canadian Government

    If you live in Canada, and you believe that the vehicle has a safety defect, notify Transport Canada immediately, and notify General Motors of Canada Company...

    Vehicle Data Recording and Privacy

    The vehicle has a number of computers that record information about the vehicle’s performance and how it is driven. For example, the vehicle uses computer modules to monitor and control engine and transmission performance, to monitor the conditions for airbag deployment and deploy them in a crash, and, if equipped, to provide antilock braking to help the driver control the vehicle...

    Other information:

    GMC Terrain 2018-2026 Owners Manual: Malfunction Indicator Lamp (Check Engine Light)


    This light is part of the vehicle’s emission control on-board diagnostic system. If this light is on while the engine is running, a malfunction has been detected and the vehicle may require service. The light should come on to show that it is working when the ignition is in Service Mode...

    GMC Terrain 2018-2026 Owners Manual: Automatic Reversal System


    The sunroof has an automatic reversal system that is only active when the sunroof is operated in express-close mode. If an object is in the path while express closing, the reversal system will detect an object, stop, and open the sunroof again. If frost or other conditions prevent closing, override the feature by closing the sunroof in manual mode...

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