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1999 TCC Buyer's Guide
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TheCarConnection.com | May 10th, 1999 For 1999 all Hummer models get a new traction control system and anti-lock brakes to make driving easier both on-road and off. The traction control system, called TorqTrac4 (or TT4), automatically engages when it senses a wheel slipping. The system uses an electronic sensor on each of the four wheels to determine when a wheel is spinning. The sensors transmit a signal to a unit that determines how to regulate brake pressure. If the wheel speed is greater than the vehicle's speed, the unit... Read More
