GMC Sierra 1500 Limited Warning Lights: What They Mean

Red: stop or act now

Brake System Warning Light

The brake system might not be working properly; driving with it on can lead to a crash.
What to do: Pull off the road and stop carefully; if the light stays on, have the vehicle towed for service. PDF page 123

Engine Coolant Temperature Warning Light

The engine has overheated; driving with the light on can damage the engine and may not be covered by warranty.
What to do: Pull over and turn off the engine as soon as possible. See Engine Overheating. PDF page 126

Charging System Light

If it stays on or comes on while driving, there may be a problem with the electrical charging system; the battery could drain.
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 120

Electric Parking Brake Light

Comes on when the parking brake is applied. Continued flashing after release, or while driving, means an Electric Parking Brake problem.
What to do: If the light does not come on or keeps flashing, see your dealer. PDF page 123

Amber: check soon

Antilock Brake System (ABS) Warning Light

If it comes on while driving or stays on, the ABS needs service. Engaging the 4WD front axle lock also turns it on.
What to do: Stop safely, turn the vehicle off and on again to reset; if the light remains or returns, get service. PDF page 123

Service Electric Parking Brake Light

If it stays on or comes on while driving, there is a problem with the Electric Parking Brake; related safety functions may be degraded.
What to do: Take the vehicle to a dealer as soon as possible. PDF page 123

Traction Control System (TCS)/StabiliTrak Light

Steady on: TCS and possibly StabiliTrak are not fully operational. Flashing: the system is actively working.
What to do: Adjust driving accordingly; if the condition persists, see your dealer as soon as possible. PDF page 126

Traction Off Light

Traction Control System has been turned off, so wheel spin is not limited except to protect the driveline.
What to do: Adjust driving accordingly. PDF page 125

StabiliTrak OFF Light

StabiliTrak/ESC is turned off, and TCS is off too, so the systems do not assist in controlling the vehicle.
What to do: Adjust driving accordingly. PDF page 125

Pedestrian Ahead Indicator

A nearby pedestrian is detected in front of the vehicle. PDF page 125

Other warnings and indicators

Security Light

If it stays on and the engine does not start, there could be a problem with the theft-deterrent system.
What to do: See Immobilizer Operation. PDF page 128

Low Fuel Warning Light

Comes on when the fuel gauge indicator nears empty.
What to do: Add fuel; if the light stays on afterward, have the vehicle serviced. PDF page 128

Passenger Airbag Status Indicator

ON means the front passenger airbag may inflate; OFF means the sensing system turned it off. Both or neither lit suggests a problem.
What to do: If both lights stay on or neither lights, see your dealer for service. PDF page 120

Trailer Sway Control Light (Uplevel Cluster)

Flashes when Trailer Sway Control is active. PDF page 126

Driver Mode Control Light

Comes on when Sport Mode is selected. PDF page 126

Green: system on

Vehicle Ahead Indicator

Green when a vehicle is detected ahead; amber when you are following a vehicle much too closely. PDF page 125

IntelliBeam Light

The IntelliBeam system, if equipped, is enabled. PDF page 128

Front Fog Lamp Light

The fog lamps are turned on. PDF page 128

Blue: system on

High-Beam On Light

The high-beam headlamps are in use. PDF page 128

Summarized in our own words from the 2022 GMC Sierra 1500 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.