While bringing the clutch slowly up to the biting point, gently push the accelerator. Once it’s safe to move, push the electric handbrake button to disengage while bringing the clutch up a little higher. Gradually increase your acceleration while you continue to slowly bring the clutch up, and you’ll start to move up the hill with complete There is no button for Hillstart Assist Control (HAC). It's on all the time. The button to the left of the Downhill Brake Control (DBC) button would be for the 4WD Lock if you had an AWD Tucson. It's blank because you only have a FWD model. hill assist (in any of the cars that I have driven that have hill assist) works by sensing rearward motion and applying the brakes until a certain engine load is reached. '13 Genesis 2.0T Black. '12 Sonata 2.0T Blue. Sometimes it is best to be quiet, and let people assume you are stupid, than to speak, and remove all doubt. What I'm wondering is if anyone knows if the Hill Start Assist could have caused some movement in the brakes or to loosen them? When pulling away while the Hill Start Assist is engaged, you do have to accelerate out of the brakes, if that makes sense. It doesn't just release the second you start engaging the gas and releasing the clutch. If I tap the brake pedal a time or two it releases the "lock" and it is generally fine the rest of the day. Occasionally, when I leave work later in the day, it will stick again. It always happens after I reverse. Hill assist works normal when I start on a hill, and the lock up occurs when the Hill assist is on or off in Sync. Any thoughts? Hill start assist is technology that makes performing hill starts easier and is available in manual and automatic cars.. There are sensors in the vehicle to detect when a vehicle is on an incline. When you are on a hill, the hill start assist maintains the brake pressure for a few seconds as you switch from the brakes to the gas pedal. USING AUTO HOLD. Bring your vehicle to a complete stop. The auto hold active indicator illuminates in the information display. Release the brake pedal. The system holds your vehicle at a standstill. The auto hold active indicator remains illuminated in the information display. Apply the accelerator and drive off in a normal manner. Check that the hill start light comes on briefly when you turn on the ignition. The same pedal push combination turns hill start assist on and off. 1) turn on the ignition. 2) push all three pedals and hold until the hill start indicator flashes - this should be after about 8 seconds. 3) release the pedals. The “Hill Start Assist Not Available” message can be triggered by a malfunctioning sensor or switch, a problem with the brake system, or a software glitch. The fixes can be as simple as restarting your car to reset the system, or it may require a visit to a professional mechanic for a more thorough diagnosis and repair. How well does the Hill Start Assist work, especially for you manual tranny drivers? According to Chevy, the HSA is supposed to engage for a max of 2 seconds when the car is stopped on any angle (front or rear facing up or downhiill) when you release the brake to prevent the car from rolling when mhpYp0.