Four-Wheel Steering with CrabWalk and Rear Steer | GMC Canada
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DESIGNED TO OFFER MORE MANOEUVRABILITY
Available 4-Wheel Steer is designed to offer greater vehicle manoeuvrability while parking at low speeds and on tight off-road trails. The system increases low-speed agility and allows the driver to achieve a tighter turn circle. 4 -Wheel Steer is also designed to help improve vehicle stability when towing a trailer.
This feature also includes GMC CrabWalk Mode, a 4-Wheel Steer setting that allows the rear wheels to turn at the same angle as the front wheels — allowing the vehicle to move diagonally.
The 4-Wheel Steer feature has three modes: Automatic, CrabWalk Mode and Off.
4-Wheel Steer is designed to offer more manoeuvrability in a variety of driving situations by syncing your front and rear tires in specific ways. The feature functions differently, depending on your drive mode. 4-Wheel Steer is engaged on your vehicle in Automatic Mode by default.
In Automatic Mode at low speeds, your vehicle’s rear tires will turn the opposite direction of the front tires for maximum maneuverability. You may see this referred to in your Owner’s Manual as “out-of-phase” turning. At higher vehicle speeds the rear wheels steer in the same direction as the front wheels to improve handling stability.
Here is what out-of-phase and in-phase steering look like:
NO REAR STEERING
STANDARD REAR STEERING OUT-OF-PHASE
IN-PHASE REAR STEERING
The angle at which your rear tires turn depends on your front steering angle and the vehicle’s speed.
There is a limit to how far the rear wheels will turn – the max angle depends on your vehicle.
To turn Rear Steering off, you have to be driving slower than 2 kph.
On certain GMC HUMMER EV models, press the physical 4-Wheel Steer button on the left side of the Driver Mode Control dial.
On other vehicles, open the Controls app on your infotainment screen, then tap the Rear Steering button and select Off Mode. Press either button again to turn Rear Steering back on.
Some vehicles offer Off-Road Mode and Terrain Mode. At lower vehicle speeds, Off-Road Mode uses a different out-of-phase steering calibration than the default Automatic Mode, offering more maneuverability on rough terrain.
Terrain Mode rear steering features similar operation as Off-Road Mode (rear tires turn out of phase with the front at lower vehicle speeds). However, the ratio of front-to-rear steering angle is further increased in Terrain Mode, delivering even more responsive steering.
CrabWalk mode is a 4-Wheel Steer setting that allows the rear wheels to turn at the same angle as the front wheels. This allows you to move your vehicle diagonally, offering flexibility in both off-roading situations and various parking scenarios.
For example, if the rear of your vehicle is facing an obstacle on the left side, and you need to turn your vehicle to the right to get around it, you might risk colliding with the obstacle in Automatic Mode.
In CrabWalk, you can move the vehicle diagonally to help avoid collisions with objects within your turning radius.
How to Enter CrabWalk Mode
As with other Four-Wheel Steer modes, there is a limit to how far your rear wheels will turn — the max angle depends on your vehicle. If you drive in CrabWalk Mode above 40 kph for more than 10 seconds, 4-Wheel Steer will go back to Automatic Mode.
How to Turn CrabWalk Mode Off
To disengage CrabWalk, you can either tap the Crab, Arrival or Sidewinder smart icon on the left side of your infotainment screen or turn the feature off through the Controls app by tapping the CrabWalk, Arrival Mode or Sidewinder Mode button. On certain GMC HUMMER EV models, you can press the physical 4-Wheel Steer button at any time.
To find out if your vehicle has this feature, contact your dealer or refer to your vehicle’s equipment list. Please check your Owner’s Manual for more information about features.
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