• Warning lights matter: Early alerts that protect your vehicle and prevent damage

• Check Engine Light: Can range from minor to urgent—don't ignore it

• Oil and coolant: Require quick attention to prevent engine damage

• Brake and ABS lights: Affect safety and should be inspected soon

• TPMS and traction: Help maintain control and efficiency on all roads

The Buick check engine light is the most common dashboard warning, and for good reason. It can mean something simple—like a loose gas cap—or something more serious, such as an engine misfire or emissions issue.

What to Do

Steady light: Schedule a diagnostic soon to identify the issue

Flashing light: The engine needs immediate attention—seek service right away

This symbol means the engine isn't getting the lubrication it needs. Low oil, a failing pump, or a leak could be the cause. Because oil is the lifeblood of the engine, this is one light you never want to ignore.

Why It Matters

Running low on oil can cause catastrophic engine damage. If the light stays on while driving, pull over safely and shut the engine off immediately. Call for service rather than continue driving.

Common causes: Low oil level, failing oil pump, or an active leak

When this light appears, the vehicle may be running solely on battery power rather than charging. It could be a weak battery, a failing alternator, or a loose connection.

What This Means

If the light stays on, the car may eventually stall when the battery fully depletes. Getting it checked quickly prevents a roadside breakdown and potential safety issues.

Common causes: Weak battery, failing alternator, or loose connection

This one means the engine is running hotter than it should. Overheating can cause major damage to the engine block, cylinder head, and seals.

Immediate Action Required

Pull over safely, turn off the engine, and let it cool for several minutes. Do not attempt to open the radiator cap while hot. Call for service or roadside assistance if needed.

Common causes: Low coolant, stuck thermostat, or failing water pump

This light can mean several things: low brake fluid, worn brake pads, or an issue with the hydraulic system. Safe stopping power is non-negotiable.

Safety Priority

If the brake warning light comes on while driving, it's smart to have the brakes inspected right away. Reduced stopping ability poses serious safety risks to you and other drivers.

Common causes: Low brake fluid, worn brake pads, or hydraulic system failure

The ABS (Anti-lock Braking System) helps prevent wheel lockup during hard braking, especially on slippery surfaces. When this light appears, the anti-lock feature may not be functioning properly.

Important Note

The vehicle can still stop normally, but the anti-lock feature may not work. It's not an emergency, but it's definitely something to get checked soon, especially before winter driving.

Common causes: Sensor malfunction or ABS hydraulic system issue

This symbol means one or more tires are underinflated. Cold weather, a slow leak, or a puncture can trigger it. Proper tire pressure is crucial for fuel economy, handling, and tire safety.

Quick Fix or Service

A quick air check at a gas station usually solves the problem. However, if the light persists after inflating the tires, there may be a slow leak or faulty sensor that needs inspection.

Effects of low pressure: Reduced fuel economy, poor handling, and shortened tire life

This one's straightforward—your fuel tank is running low. When the light comes on, you typically have 30–50 miles left, depending on the model and driving conditions.

Fuel Pump Protection

Running too low on fuel can strain the fuel pump over time. The fuel pump relies on gasoline for cooling and lubrication, so refueling before the light comes on helps extend the pump's lifespan.

Best practice: Refuel when the tank reaches 1/4 full to protect the fuel pump

This light often flickers during slippery conditions—and that's completely normal. It means the system is actively helping maintain control on wet, icy, or uneven surfaces.

When to Be Concerned

If the light stays on continuously during normal driving, the system may be disabled due to a sensor issue. It's still safe to drive, but stability control is an important safety feature, especially in South Dakota winters.

Flickering is normal: Especially on snow, ice, or wet roads—the system is working as intended

Olympic Buick GMC is always here to help diagnose, explain, and fix whatever your dashboard throws your way. When in doubt, give us a call or bring your Buick in for a quick inspection. We'll make sure you're back on the road safely.

What should I do if my Check Engine Light starts flashing?

A flashing light usually indicates an urgent engine issue, often related to misfires or severe emissions problems. It's best to stop driving and seek service immediately rather than risk engine damage.

Can I drive with the ABS light on?

Yes, the vehicle will still stop normally, but the anti-lock braking feature may not work properly. Schedule an inspection soon, especially before winter when ABS is most useful on slippery roads.

Why does my TPMS light come on in cold weather?

Cold air reduces tire pressure naturally. For every 10°F drop in temperature, tire pressure can decrease by about 1 PSI. Adding air typically resolves the issue, but check for leaks if it persists.

Is the Low Fuel Light harmful if it comes on often?

Running low frequently can strain the fuel pump, which relies on gasoline for cooling. It's better to refuel before the light appears to extend the pump's lifespan and avoid potential breakdowns.

When should I bring my Buick in for service after a warning light comes on?

If the light stays on or affects performance, schedule service as soon as possible. Critical lights (oil, coolant, brake) require immediate attention, while others can be addressed within a few days.