Chevrolet Blazer Warning Lights: What They Mean

Red: stop or act now

Brake System Warning Light

Brake system may not be working properly; a brake problem or low brake fluid. 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 106

Amber: check soon

Lane Keep Assist (LKA) Light

Amber flashing is a lane departure warning that a lane marking was unintentionally crossed. Green means ready; white means not ready. PDF page 107

Other warnings and indicators

Engine Coolant Temperature Warning Light

The engine has overheated. Driving with the light on can damage the engine.
What to do: Pull over and turn off the engine as soon as possible. PDF page 109

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, turn off accessories and find a safe place to stop. PDF page 104

Malfunction Indicator Lamp (Check Engine Light)

Part of the emission control diagnostic system; if on with the engine running, a malfunction was detected and service may be needed.
What to do: Seek service promptly to possibly prevent damage. PDF page 104

Antilock Brake System (ABS) Warning Light

If it stays on or comes on while driving, the vehicle needs service. If alone, regular brakes work but ABS does not.
What to do: If both ABS and brake system lights are on, see your dealer for service. PDF page 107

Service Electric Parking Brake Light

If it stays on or comes on while driving, there is a problem with the Electric Parking Brake; other safety functions may be degraded.
What to do: Take the vehicle to a dealer as soon as possible. PDF page 107

Electric Parking Brake Light

Comes on when the parking brake is applied. Continued flashing after release or while driving indicates a problem with the system.
What to do: If it does not come on or remains flashing, see your dealer. PDF page 106

Electronic Stability Control (ESC) Off Light

StabiliTrak/ESC is turned off, and TCS is also off, so the systems do not assist in controlling the vehicle.
What to do: Adjust driving accordingly. PDF page 109

Low Fuel Warning Light

Comes on when the fuel gauge nears empty.
What to do: Add fuel; if the light does not turn off, have the vehicle serviced. PDF page 111

Security Light

If it stays on and the engine does not start, there could be a problem with the theft-deterrent system. PDF page 111

High-Beam On Light

The high-beam headlamps are in use. PDF page 111

IntelliBeam Light

The IntelliBeam system, if equipped, is enabled. PDF page 111

Summarized in our own words from the 2026 Chevrolet Blazer 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.