2018 GMC SIERRA warning

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Refer to your Owner’s Manual to learn about the information being relayed by the lights, gauges and indicators on the instrument cluster.
See In Brief in your Owner’s Manual.
Driver’s Heated/Vented Seat Buttons
GMC Infotainment System Touch ScreenPassenger’s Heated/Vented Seat ButtonsClimate Controls
Accessory Power Outlets
Adjustable Pedals Switch/Traction Control and StabiliTrak Button/Cargo Box Lamp Button
110V OutletUSB PortsWireless Charging PadF
Antilock Brake System
Diesel Exhaust Brake (diesel models only)
Low Tire Pressure (single rear wheel models only)
Door Ajar
Oil Pressure
Charging System
Safety Belt Reminder
Lane Keep Assist
F Optional equipment
Front and Rear Parking AssistF/ Lane Keep AssistF(LD models)/ Lane Departure WarningF(HD models)/Hill Descent ControlF/Diesel Exhaust Brake (if equipped) Buttons
Note: Diesel model shown.

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Safety Alert SeatF
The driver’s seat pulses — left side, right side, or simultaneousl\
y — to alert the driver of potential hazards.
Audible notification may be selected instead of Safety Alert Seat puls\
ing notification. To change the alert setting, go to Settings > Vehicle > Collision/Detection\
Systems > Alert Type.
Forward Collision AlertF
The Vehicle Ahead indicator is green when a vehicle is detected and is amber when following a vehicle ahead much too closely. When approach-ing a vehicle directly ahead too rapidly, a red alert flashes on the windshield and the Safety Alert Seat pulses or beeps sound (if selected).
Press the Collision Alert button on the left side of the steering wheel to set the alert timing to Far, Medium, Near, or Off.
Low-Speed Forward Automatic BrakingF (LD Models Only)
The brakes may be applied automatically in potential collision situation\
s to help reduce damage or help avoid collisions with vehicles directly ahead.
To turn the system on or off, go to Settings > Vehicle > Collision/Detec\
tion Systems > Auto Collision Preparation.
Lane Keep Assist with Lane Departure WarningF (LD Models Only)
The system may help avoid collisions due to unintentional lane departure\
s. The Lane Keep Assist indicator is green if the system is available to assist. If the v\
ehicle approaches a detected lane marking without using a turn signal in that direction, the system may assist by gently turning the steering wheel and displaying an amber .
If active driver steering is not detected, the amber may flash and the Safety Alert Seat may pulse or beeps may sound (if selected) on the side of the departure di\
rection as the lane marking is crossed. In order to use this system safely, the driver needs to stee\
r and be in complete control of the vehicle.
Press the Lane Keep Assist button on the center of the instrument panel to turn the
system on or off.
Lane Departure WarningF (HD Models Only)
When crossing a detected lane marking without using a turn signal in tha\
t direction, the system flashes an amber  indicator on the instrument cluster and the Safety Alert Seat pulses or\
beeps sound (if selected) on the side of the lane departure direction.
Press the Lane Departure Warning button on the center of the instrument panel to turn the system on or off.
Rear Vision Camera
When the vehicle is in Reverse, a view of the area behind the vehicle di\
splays on the infotainment system. Vehicle speed must be below 5 mph.
To turn the Guidelines or Rear Park Assist Symbols on or off, go to Settings > Rear Camera.
DRIVER ASSISTANCE SYSTEMS
F Optional equipment

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Sunroof Controls
The sunroof controls are located on the over-head console.
SLIDETILT Express Open/
SLIDE TILT
Close
Fully press the rear of the SLIDE switch to express open the sunroof. Gently press and hold the switch to partially open the sunroof.
Fully press the front of the SLIDE switch to express close the sunroof. Gently press and hold the switch to partially close the sunroof.
SLIDETILTVent/
SLIDE TILT
Close
Press the rear of the TILT switch to vent the sunroof from the closed position.
Press the front of the TILT switch to close the sunroof.
Sunshade
Open and close the sunshade manually by pulling it rearward or forward.
See Keys, Doors and Windows in your Owner’s Manual.
POWER REAR WINDOWF
SUNROOFF
The power rear window switch is located on the overhead console.
Press the switch to open the rear  window.
Pull the switch to close the rear 
window.
Note: The power rear window cannot be operated manually.

See Keys, Doors and Windows in your Owner’s Manual.F Optional equipment
TIRE PRESSURE MONITOR (SINGLE REAR WHEEL MODELS ONLY)
The Low Tire Pressure warning light on the instrument cluster illuminates wh\
en one or more of the vehicle’s tires is significantly underinflated. Fill the t\
ires to the proper tire pressures listed on the Tire and Loading Information label, located below the driver’s\
door latch. Current tire pressures can be viewed on the Driver Information Center.
The Tire Fill Alert provides visual and audible alerts to help when infl\
ating a tire to the recom-mended tire pressure.
Refer to your Owner’s Manual for information about normal monthly tir\
e maintenance.
See Vehicle Care in your Owner’s Manual.