GMC Acadia Limited Warning Lights: What They Mean

Red: stop or act now

Brake System Warning Light

A brake problem if it stays on after the parking brake is fully released, or if it comes on while driving.
What to do: Pull off the road and stop carefully, confirm the parking brake is released. If light stays on, have the vehicle towed for service. PDF page 113

Engine Coolant Temperature Warning Light

If it comes on and stays on while driving, the vehicle may have a cooling system problem. PDF page 114

Charging System Light

If it stays on or comes on while driving, the electrical charging system may have a problem; the battery could drain.
What to do: Have it checked by your dealer. If you must drive a short distance, turn off all accessories such as radio and air conditioner. PDF page 110

Amber: check soon

Antilock Brake System (ABS) Warning Light

If it stays on or comes on while driving, the antilock brakes are not working; the vehicle needs service.
What to do: Stop as soon as possible, turn the ignition off, restart to reset. If light stays on, get service. PDF page 113

StabiliTrak® Indicator Light

Flashes while StabiliTrak or traction control is working; stays on when there is a problem with the StabiliTrak system. PDF page 114

Malfunction Indicator Lamp (Check Engine Light)

Part of the emission control diagnostic system; if on with engine running, a malfunction has been detected. PDF page 110

Other warnings and indicators

Passenger Airbag Status Indicator

ON means the front passenger airbag may inflate; OFF means the sensing system has turned it off.
What to do: If both or neither are lit after several seconds, see your dealer for service. PDF page 110

Tow/Haul Mode Light

Comes on when Tow/Haul Mode has been activated. PDF page 113

Green: system on

Lane Departure Warning (LDW) Light

Green when LDW is on and ready; flashing amber means a lane marking was crossed without a turn signal.
What to do: If it does not come on briefly at startup, have the vehicle serviced. PDF page 114

Vehicle Ahead Indicator

Green when a vehicle is detected ahead; amber when you are following much too closely. PDF page 114

Summarized in our own words from the 2017 GMC Acadia Limited owner's manual (AI-assisted; every light name was matched against its cited page 2026-10-18). Your vehicle may not have every light, and other years can differ. A red warning that stays on usually means stop safely and check: your manual has the final word.