Cruise Control
With cruise control, you can maintain a speed of about 40 km/h (25 mph) or more without keeping your foot on the accelerator. Cruise control does not work at speeds below about 40 km/h (25 mph).
Warning
Cruise control can be dangerous where you cannot drive safely at a steady speed. Do not use cruise control on winding roads or in heavy traffic. Cruise control can be dangerous on slippery roads. On such roads, fast changes in tire traction can cause excessive wheel slip, and you could lose control. Do not use cruise control on slippery roads.
If equipped with the Traction Control System (TCS), the system may begin to limit wheel spin while you are using cruise control. If this happens, the cruise control will automatically disengage. See Traction Control/Electronic Stability Control 0 163. If a collision alert occurs when cruise control is activated, cruise control is disengaged. See Forward Collision Alert (FCA) System 0 178. When road conditions allow you to safely use it again, the cruise control can be turned back on. If the brakes are applied, the cruise control disengages.
5 : Press to turn cruise control on or off. A white indicator comes on in the instrument cluster when cruise is on. +RES : If there is a set speed in memory, press briefly to resume to that speed or press and hold to accelerate. If cruise control is already active, use to increase vehicle speed. SET– : Press briefly to set the speed and activate cruise control. If cruise control is already active, use to decrease vehicle speed. * : Press to disengage cruise control without erasing the selected set speed. Setting Cruise Control
If5 is on when not in use, SET− or +RES could get pressed and go into cruise when not desired. Keep 5 off when cruise is not being used.
1. Press5 to turn the cruise control system on.
2. Get up to the desired speed.
3. Press and release SET– . 4. Remove foot from the accelerator. The cruise control indicator on the instrument cluster turns green after the cruise control has been set to the desired speed. See Instrument Cluster 0 96.
Resuming a Set Speed
If the cruise control is set at a desired speed and then the brakes are applied or* is pressed, the cruise control is disengaged without erasing the set speed from memory. Once the vehicle speed is 40 km/h (25 mph) or greater, briefly press +RES. The vehicle returns to the previous set speed.
Increasing Speed While Using Cruise Control
If the cruise control system is already activated: . Press and hold +RES until the
desired speed is reached, then release it.
. To increase vehicle speed in small increments, briefly press +RES. For each press, the vehicle goes about 1 km/h (1 mph) faster.
The speedometer reading can be displayed in either English or metric units. See Instrument Cluster 0 96. The increment value used depends on the units displayed.
Reducing Speed While Using Cruise Control
If the cruise control system is already activated: . Press and hold SET– until the
desired lower speed is reached, then release it.
. To decrease the vehicle speed in smaller increments, briefly press SET−. For each press, the vehicle goes about 1 km/h (1 mph) slower.
The speedometer reading can be displayed in either English or metric units. See Instrument Cluster 0 96. The increment value used depends on the units displayed.
Chevrolet Impala Owner Manual (GMNA-Localizing-U.S./Canada-13688912) - 2020 - CRC - 6/11/19
Driving and Operating 167 Passing Another Vehicle While Using Cruise Control
Use the accelerator pedal to increase vehicle speed. When you take your foot off the pedal, the vehicle will slow down to the previous set cruise speed. While pressing the accelerator pedal or shortly following the release to override cruise control, briefly pressing SET− will result in cruise control set to the current vehicle speed.
Using Cruise Control on Hills
How well the cruise control works on hills depends upon the vehicle speed, the load, and the steepness of the hills. When going up steep hills, you might have to step on the accelerator pedal to maintain your speed. When going downhill, you might have to brake or shift to a lower gear to keep your speed down. If the brake pedal is applied, the cruise control will disengage.
Ending Cruise Control
There are four ways to end cruise control:
. To disengage cruise control, step lightly on the brake pedal.
. Press*.
. Shift the transmission to N (Neutral).
. To turn off the cruise control, press5.
Erasing Speed Memory
The cruise control set speed is erased from memory if 5 is pressed or the ignition is turned off.
Adaptive Cruise Control
If equipped, Adaptive Cruise Control (ACC) allows the driver to select the cruise control set speed and following gap. Read this entire section before using this system. The following gap is the following time between your vehicle and a vehicle detected directly ahead in your path moving in the same direction. If no vehicle is detected in your path, ACC works like regular
cruise control. ACC uses a radar sensor. See Radio Frequency Statement 0 300. If a vehicle is detected in your path, ACC can apply acceleration or limited, moderate braking to maintain the selected following gap. To disengage ACC, apply the brake. If ACC is controlling your vehicle speed when the Traction Control System (TCS) or StabiliTrak/ Electronic Stability Control (ESC) activates, the ACC may automatically disengage. When road conditions allow ACC to be safely used, the ACC can be turned back on. If TCS or StabiliTrak/ESC have been disabled, the ACC will not engage. See Traction Control/ Electronic Stability Control 0 163.
Warning
ACC has limited braking ability and may not have time to slow the vehicle down enough to avoid a collision with another vehicle you are following. This can occur
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Chevrolet Impala Owner Manual (GMNA-Localizing-U.S./Canada-13688912) - 2020 - CRC - 6/11/19
168 Driving and Operating
Warning (Continued)
when vehicles suddenly slow or stop ahead, or enter your lane. Also see “Alerting the Driver” in this section. Complete attention is always required while driving and you should be ready to take action and apply the brakes. See Defensive Driving 0 141.
Warning
ACC will not detect or brake for children, pedestrians, animals, or other objects. Do not use ACC when: . On winding and hilly roads
or when the sensors are blocked by snow, ice, or dirt. The system may not detect a vehicle ahead. Keep the entire front of the vehicle clean.
. Visibility is low, such as in
fog, rain, or snow conditions. ACC performance is limited under these conditions.
. On slippery roads where fast changes in tire traction can cause excessive wheel slip.
] : Press to turn the system on or off. A white Adaptive Cruise Control indicator comes on.
+RES : Press briefly to resume the previous set speed or hold to accelerate. If ACC is already active, use to increase vehicle speed. SET– : Press briefly to set the speed and activate ACC. If ACC is already active, use to decrease vehicle speed. * : Press to disengage ACC without erasing the selected set speed. GAP : Press to select a following gap time (or distance) setting for ACC of Far, Medium, or Near. Setting Adaptive Cruise Control
If the cruise system is on but not in use, it could get set and go into cruise when not desired. Keep the cruise control button off when cruise is not being used. Select the set speed desired for cruise. This is the vehicle speed when no vehicle is detected in its path. ACC will not set or resume at a speed less than 25 km/h (16 mph).
Chevrolet Impala Owner Manual (GMNA-Localizing-U.S./Canada-13688912) - 2020 - CRC - 6/11/19
Driving and Operating 169
To set ACC: 1. Press]. 2. Get up to the desired speed. 3. Press and release SET–. 4. Remove your foot from the
accelerator. After ACC is set, it may immediately apply the brakes if a vehicle ahead is closer than the selected following gap.
The ACC indicator displays on the instrument cluster. When ACC is active, the indicator turns green. Be mindful of speed limits, surrounding traffic speeds, and weather conditions when selecting the set speed.
Resuming a Set Speed
If the ACC is set at a desired speed and then the brakes are applied, ACC is disengaged without erasing the set speed from memory. To begin using ACC again, press +RES. The vehicle returns to the previous set speed.
Increasing Speed While ACC is at a Set Speed
If ACC is already activated, do one of the following: . Use the accelerator to get to the
higher speed. Press SET–. Release the control and the accelerator pedal. The vehicle will now cruise at the higher speed. When the accelerator pedal is pressed, ACC will not brake because it is overridden. A warning message will appear on the Driver Information Center (DIC). See Vehicle Messages 0 112.
. Press and hold +RES until the desired set speed appears on the display, then release it.
. To increase vehicle speed in small increments, briefly press +RES. For each press the vehicle goes 5 km/h (1 mph) faster.
When it is determined that there is no vehicle ahead or the vehicle is beyond the selected following gap, then the vehicle speed will increase to the set speed. The speedometer reading can be displayed in either English or metric units. See Instrument Cluster 0 96. The increment value used depends on the units displayed.
Reducing Speed While ACC is at a Set Speed
If ACC is already activated, do one of the following: . Use the brake to get to the
desired lower speed. Release the brake and press SET−. The vehicle will now cruise at the lower speed.
Chevrolet Impala Owner Manual (GMNA-Localizing-U.S./Canada-13688912) - 2020 - CRC - 6/11/19
170 Driving and Operating
. Press and hold SET– until the
desired lower speed is reached, then release it.
. To decrease the vehicle speed in smaller increments, briefly press SET–. For each press, the vehicle goes about 5 km/h (1 mph) slower.
The speedometer reading can be displayed in either English or metric units. See Instrument Cluster 0 96. The increment value used depends on the units displayed.
Selecting the Follow Distance Gap
When a slower moving vehicle is detected ahead within the selected following gap, ACC will adjust the vehicle's speed and attempt to maintain the follow distance gap selected. Press GAP on the steering wheel to adjust the following gap. When pressed, the current gap setting displays briefly on the instrument cluster.
Subsequent presses cycle the gap button through three settings: Far, Medium, or Near. The gap setting will be maintained until it is changed. Since each gap setting corresponds to a following time (Far, Medium, or Near), the following distance will vary based on vehicle speed. The faster the vehicle speed, the further back your vehicle will follow a vehicle detected ahead. Consider traffic and weather conditions when selecting the following gap. The range of selectable gaps may not be appropriate for all drivers and driving conditions. Changing the gap setting automatically changes the alert timing sensitivity (Far, Medium, or Near) for the Forward Collision Alert (FCA) feature. See Forward Collision Alert (FCA) System 0 178.
Alerting the Driver
If ACC is engaged, driver action may be required when ACC cannot apply sufficient braking because of approaching a vehicle too rapidly. When this condition occurs, six red lights will flash on the windshield and eight beeps will sound from the front. See Defensive Driving 0 141.
Approaching and Following a Vehicle
The vehicle ahead symbol is in the DIC.
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Driving and Operating 171
The vehicle ahead symbol only displays when a vehicle is detected in your vehicle’s path moving in the same direction. If this symbol is not displaying, ACC will not respond to or brake to vehicles ahead. ACC automatically slows the vehicle down and adjusts vehicle speed to follow the vehicle in front at the selected follow gap. The vehicle speed increases or decreases to follow the vehicle in front of you, but will not exceed the set speed. It may apply limited braking, if necessary. When braking is active, the brake lights will come on. The automatic braking may feel or sound different than if the brakes were applied manually. This is normal.
Stationary or Very Slow-Moving Objects
Warning
ACC may not detect and react to stopped or slow-moving vehicles ahead of you. For example, the system may not brake for a vehicle it has never detected moving. This can occur in stop-and-go traffic or when a vehicle suddenly appears due to a vehicle ahead changing lanes. Your vehicle may not stop and could cause a crash. Use caution when using ACC. Your complete attention is always required while driving and you should be ready to take action and apply the brakes.
ACC Automatically Disengages
ACC may automatically disengage and the driver will need to manually apply the brakes to slow the vehicle if: . The sensors are blocked.
. The Traction Control System (TCS) or StabiliTrak/ESC system has activated or been disabled.
. There is a fault in the system.
. The radar falsely reports blockage when driving in a desert or remote area with no other vehicles or roadside objects. A DIC message may display to indicate that ACC is temporarily unavailable.
A message indicating that the cruise is disengaging will appear on the DIC and the ACC active symbol will not be displayed when ACC is no longer active.
Notification to Resume ACC
ACC will maintain a following gap behind a detected vehicle and slow your vehicle to a stop behind that vehicle. If the stopped vehicle ahead has driven away and ACC has not been resumed, the vehicle ahead symbol will flash as a reminder to check traffic ahead before proceeding. In addition, three beeps will sound.
Chevrolet Impala Owner Manual (GMNA-Localizing-U.S./Canada-13688912) - 2020 - CRC - 6/11/19
172 Driving and Operating
See “Adaptive Cruise Go Notifier” under “Collision/Detection Systems” in Vehicle Personalization 0 113. When the vehicle ahead drives away, press +RES or the accelerator pedal to resume cruise control. If stopped for more than two minutes or if the driver door is opened, the ACC automatically applies the Electric Parking Brake (EPB) to hold the vehicle. The EPB status light will turn on. See Electric Parking Brake 0 161. To resume ACC and release the EPB, press the accelerator pedal. ACC can be resumed when the vehicle is travelling greater than 25 km/h (16 mph). A DIC warning message may display indicating to shift to P (Park) before exiting the vehicle. See Vehicle Messages 0 112.
Warning
If ACC has stopped the vehicle, and if ACC is disengaged, turned off, or canceled, the vehicle will no longer be held at a stop. The vehicle can move. When ACC is holding the vehicle at a stop, always be prepared to manually apply the brakes.
Warning
Leaving the vehicle without placing it in P (Park) can be dangerous. Do not leave the vehicle while it is being held at a stop by ACC. Always place the vehicle in P (Park) and turn off the ignition before leaving the vehicle.
ACC Override
If using the accelerator pedal while ACC is active, a DIC warning message will indicate that automatic
braking will not occur. See Vehicle Messages 0 112. ACC will resume operation when the accelerator pedal is not being pressed.
Warning
The ACC will not automatically apply the brakes if your foot is resting on the accelerator pedal. You could crash into a vehicle ahead of you.
Curves in the Road
Warning
On curves, ACC may not detect a vehicle ahead in your lane. You could be startled if the vehicle accelerates up to the set speed, especially when following a vehicle exiting or entering exit ramps. You could lose control of the vehicle or crash. Do not use ACC while driving on an entrance or exit ramp. Always be ready to use the brakes if necessary.
Chevrolet Impala Owner Manual (GMNA-Localizing-U.S./Canada-13688912) - 2020 - CRC - 6/11/19
Warning
On curves, ACC may respond to a vehicle in another lane, or may not have time to react to a vehicle in your lane. You could crash into a vehicle ahead of you, or lose control of your vehicle. Give extra attention in curves and be ready to use the brakes if necessary. Select an appropriate speed while driving in curves.
ACC may operate differently in a sharp curve. It may reduce the vehicle speed if the curve is too sharp.
When following a vehicle and entering a curve, ACC may not detect the vehicle ahead and accelerate to the set speed. When this happens, the vehicle ahead symbol will not appear.
ACC may detect a vehicle that is not in your lane and apply the brakes. ACC may occasionally provide an alert and/or braking that is considered unnecessary. It could respond to vehicles in different lanes, signs, guardrails, and other stationary objects when entering or exiting a curve. This is normal operation. The vehicle does not need service.
Other Vehicle Lane Changes
ACC will not detect a vehicle ahead until it is completely in the lane. The brakes may need to be manually applied.
Do Not Use ACC on Hills and When Towing a Trailer
174 Driving and Operating
Do not use ACC when driving on steep hills or when towing a trailer. ACC will not detect a vehicle in the lane while driving on steep hills. The driver will often need to take over acceleration and braking on steep hills, especially when towing a trailer. If the brakes are applied, the ACC disengages.
Disengaging ACC
There are three ways to disengage ACC: . Step lightly on the brake pedal. . Press*. . Press].
Erasing Speed Memory
The cruise control set speed is erased from memory if ] is pressed or if the ignition is turned off.
Cleaning the Sensing System
The radar sensor on the front of the vehicle can become blocked by snow, ice, dirt, or mud. These areas need to be cleaned for ACC to operate properly. For cleaning instructions, see “Washing the Vehicle” under Exterior Care 0 264. System operation may also be limited under snow, heavy rain, or road spray conditions.
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