For owners of the 2017 GMC Terrain, understanding the nuances of its towing capacity is essential for maximizing the utility of this compact crossover. While not positioned as a heavy-duty hauler, the Terrain offers a respectable capability that opens the door to weekend adventures and practical hauling tasks. The specific figure, however, is not a single number but a calculated range determined by a careful equation involving the vehicle's Gross Vehicle Weight Rating (GVWR) and the tongue weight of the trailer.
The Foundation of Towing: Gross Vehicle Weight Rating (GVWR)
The primary factor dictating how much you can tow is the 2017 GMC Terrain's Gross Vehicle Weight Rating. This is the maximum total weight of the fully loaded vehicle, including passengers, cargo, fuel, and the trailer tongue weight. Every trim level has a specific GVWR, typically falling between 6,300 and 6,500 pounds. To determine your available towing capacity, you must subtract the vehicle's current loaded weight from this GVWR. For example, if your Terrain has a GVWR of 6,400 pounds and the current weight with occupants and gear is 4,500 pounds, you have approximately 1,900 pounds of capacity for the trailer tongue.
Factory Ratings by Drivetrain Configuration
Under ideal conditions and with the proper trailer wiring, GMC provides specific towing guidelines based on the engine and drivetrain. The standard 1.5L turbocharged four-cylinder engine offers a capable platform, but the available powertrains define the limits. Here is a breakdown of the factory towing ratings for the main configurations:
It is crucial to note that these figures assume an appropriate trailer with a proper weight distribution and do not account for significant variations in vehicle accessories or passenger load.
The Critical Role of Tongue Weight
Tongue weight is the downward force exerted by the trailer's coupler on the tow vehicle's hitch. This is a safety metric that is just as important as the total towing capacity. The recommended tongue weight is typically 10% to 15% of the total trailer weight. If the tongue weight is too light, the trailer can become swayful and disconnected; if it is too heavy, it can strain the rear suspension and brakes of the 2017 Terrain, leading to poor handling and potential mechanical failure. Always ensure the trailer is loaded so that it settles naturally at the correct percentage of the vehicle's capacity.
Essential Equipment and Compatibility
To safely utilize the towing capacity of the 2017 GMC Terrain, specific equipment is mandatory. A factory-class trailer tow package is required for most configurations, which includes a heavy-duty radiator, transmission cooler, and upgraded wiring harness. This package ensures the vehicle can manage the additional thermal stress of towing. Furthermore, the trailer must connect via a compatible wiring harness that supports brake lights and turn signals. For trailers with electric brakes, a brake controller installed on the dashboard is necessary to synchronize stopping power between the vehicle and the trailer.
