GMC‘s Hummer gave us CrabWalk mode, and now adds an enhancement the company calls King Crab mode.
With King Crab mode it allows the driver to turn the rear wheels at a greater angle than the front wheels. In fact, The rear wheels steer in the opposite direction as the front wheels and can be engaged at lower vehicle speeds less than 32 km/h (20 mph).
Both modes are intended to improve maneuverability for specific off road situations. However, the only demonstrations we’ve seen have been on dry pavement.
Note that if the vehicle speed reaches higher than about 40 km/h (25 mph) for more than 10 seconds, the vehicle will automatically exit the crab modes and turn on Automatic Mode.
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The material on these pages is provided for information sharing purposes only and should not be used in lieu of an OEM service manual or factory authorized service procedure. We are not in the auto repair business, nor do we publish automotive service manuals. Nothing we include on these pages and posts has been reviewed, approved or authorized by any vehicle manufacturer.
Remember — only proper service and repair procedures will ensure the safe and reliable operation of your car. In addition, proper safety procedures and precautions, such as the use of safety goggles, the right tools and the equipment should be followed at all times to eliminate the possibility of personal injury or improper service which could damage the vehicle or compromise its safety.
Technology is always changing and what is current and accurate today may be literally out-of-date and inaccurate tomorrow. And when it comes to the current state of flux in the auto industry, nothing is more true.
The author has 30+ years of automotive experience and has assembled the most extensive collection of symbols and warning lights anywhere (over 1,000!) and can help you open and start any keyless start car with a dead key fob battery. BA, St. Joseph’s, ME: MS, RPI, NY
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