Cadillac XT6 Warning Lights: What They Mean

Red: stop or act now

Brake System Warning Light

Brake problem, possibly low brake fluid. Driving with it on can lead to a crash; braking may be weaker and speed limited.
What to do: Pull off the road and stop carefully. If still on, have the vehicle towed for service. PDF page 111

Other warnings and indicators

Airbag Readiness Light

Electrical problem in the airbag system; airbags might not inflate in a crash or could inflate without one.
What to do: Have the vehicle serviced right away. PDF page 108

Charging System Light

Possible problem with the electrical charging system; driving with it on could drain the battery.
What to do: Have it checked by your dealer. If driving a short distance, turn off accessories and find a safe place to stop. PDF page 109

Malfunction Indicator Lamp (Check Engine Light)

Emission control diagnostic system detected a malfunction and the vehicle may need service.
What to do: Seek service promptly; driving long with it on may reduce performance and fuel economy and cause costly repairs. PDF page 109

Antilock Brake System (ABS) Warning Light

Vehicle needs service. If only this light is on, regular brakes work but ABS does not; with brake light too, regular brakes have a problem.
What to do: See your dealer for service. PDF page 112

Service Electric Parking Brake Light

Problem with the Electric Parking Brake; other safety functions using it may also be degraded.
What to do: Take the vehicle to a dealer as soon as possible. PDF page 112

Electric Parking Brake Light

Comes on when parking brake is applied. Continued flashing after release or while driving means a problem with the system.
What to do: If the light does not come on or keeps flashing, see your dealer. PDF page 111

Low Tire Pressure Warning Light

Low tire pressure detected. 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 325

Security Light

If it stays on and the engine will not start, there could be a problem with the theft-deterrent system.
What to do: Have the vehicle serviced by your dealer. PDF page 116

Low Fuel Warning Light

Fuel gauge is nearing empty.
What to do: Add fuel; if the light stays on afterward, have the vehicle serviced. PDF page 116

Passenger Airbag Status Indicator

ON means the front passenger airbag may inflate; OFF means the passenger sensing system turned it off.
What to do: If both or neither are lit after several seconds, see your dealer. PDF page 108

High-Beam On Light

High-beam headlamps are in use. PDF page 116

IntelliBeam Light

The IntelliBeam system is enabled. PDF page 116

Lamps On Reminder

Exterior lamps are in use, except when only Daytime Running Lamps are active. PDF page 116

Green: system on

Performance Shifting Light

May show when Sport Mode is active and driving conditions are met; gear shifting is adjusted for sporty driving. PDF page 112

Cruise Control Light

White when cruise control is on and ready; green when set and active. PDF page 116

Summarized in our own words from the 2025 Cadillac XT6 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.