GMC Acadia Warning Lights: What They Mean

Amber: check soon

Vehicle Ahead Indicator

Shows amber when you are following a vehicle too closely. Green means a vehicle is detected ahead. PDF page 112

Pedestrian Ahead Indicator

A pedestrian has been detected in front of the vehicle. PDF page 112

Other warnings and indicators

Airbag Readiness Light

Electrical problem in the airbag system. If it stays on or comes on while driving, airbags might not inflate in a crash or could inflate without one.
What to do: Have the vehicle serviced right away. If it does not come on briefly at startup, have it fixed immediately. PDF page 107

Low Tire Pressure Warning Light

One or more tires are significantly under-inflated. If it flashes about a minute then stays on, the TPMS has a malfunction.
What to do: Stop as soon as possible and inflate tires to the pressure on the Tire and Loading Information label. PDF page 300

Automatic Emergency Braking (AEB) Disabled Light

Automatic Emergency Braking or Front Pedestrian Braking is turned off, or unavailable due to malfunction, weather, or a dirty windshield. PDF page 112

Traction Off Light

Traction Control System is turned off, which also happens when StabiliTrak/ESC is turned off. Wheel slip no longer limits acceleration except to protect the driveline.
What to do: Adjust your driving accordingly. If it does not display briefly at startup, see your dealer. PDF page 112

Passenger Airbag Status Indicator

ON means the front passenger airbag may inflate; OFF means the passenger sensing system turned it off. Both lit or none lit indicates a problem. PDF page 107

Summarized in our own words from the 2026 GMC Acadia 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.