Chevrolet Warning Lights

Air Conditioning Light

The air conditioning (A/C) light typically indicates that the air conditioning system is turned on and actively cooling the air inside the cabin. This light is usually part of the climate control system and may be located on the climate control panel or integrated into the dashboard display.

When the A/C light is on, it means that the A/C compressor is engaged and the system is working to cool the air. If the light is off, it usually means the A/C is not active, although the vehicle's ventilation system might still be running. If you're having issues with your A/C, such as the light not coming on or the system not cooling effectively, it might be a sign of a problem with the A/C system that requires professional attention.

Antilock Brake System (ABS)

The Antilock Brake System (ABS) light serves as an indicator of the status of the ABS. When you start the car, the ABS light should briefly illuminate as part of the system’s self-check to ensure everything is functioning correctly. If the light goes out after a few seconds, it means the ABS system is operational.

However, if the ABS light remains on or comes on while driving, it indicates a problem with the ABS. This could be due to issues such as:

• Faulty wheel speed sensors: These sensors monitor the speed of each wheel and send data to the ABS control module.
• Problems with the ABS control module: This is the brain of the ABS system, and if it malfunctions, it can affect the system’s performance.
• Issues with the ABS pump or motor: The pump and motor work together to manage brake pressure during ABS activation.

When the ABS light is on, the regular braking system will continue to function normally, but the ABS feature might be disabled. If the ABS light is on, it’s important to have your vehicle inspected by a professional to diagnose and fix the issue. ABS helps maintain steering control during hard braking or slippery conditions, so addressing any issues promptly is crucial for your safety.

Audio Steering Wheel Controls or Onstar® if equipped

Audio Steering Wheel Controls Light

In Chevrolet vehicles, the light or icon associated with audio steering wheel controls typically indicates the status of these controls. If there's a specific light or indicator for the steering wheel audio controls, it usually means that:

• The controls are active: The light might illuminate to show that the steering wheel buttons for audio functions (like volume, track change, or phone controls) are currently enabled.
• There is a malfunction: If the light is on but the controls aren’t working, it could indicate an issue with the steering wheel controls, such as a wiring problem or a malfunctioning switch.

If you encounter issues with the audio controls on your steering wheel, such as them not responding, it might be worth checking the vehicle's fuse for the audio system or having it inspected by a professional to ensure proper functionality.

OnStar® Light

The OnStar light or indicator in a Chevrolet vehicle pertains to the OnStar system, which is a connected services platform providing features like emergency assistance, navigation, remote vehicle management, and more.

• OnStar Active: If the OnStar light is illuminated or you see an indicator that suggests OnStar is active, it means the system is connected and operational.
• OnStar Not Connected or Issue: If the light is off or you see a different indicator (like a warning light), it may mean there’s an issue with the OnStar system or that it’s not currently active.

If there are problems with OnStar, such as connectivity issues or service problems, you may need to contact OnStar customer support or visit a Chevrolet dealership for assistance. They can help resolve any connectivity issues or service concerns.

Charging System Light

The charging system light (sometimes labeled as the battery light) indicates that there may be an issue with the vehicle’s charging system. This system includes components like the alternator, battery, and associated wiring.

What the Charging System Light Means

• Illuminated Light: If the charging system light comes on while you’re driving, it typically means that the alternator is not properly charging the battery or there’s a problem with the charging system. This could be due to:

  • Faulty Alternator: The alternator might not be generating enough power.
  • Loose or Broken Belts: The belt that drives the alternator could be loose or broken.
  • Battery Issues: The battery may be old or not holding a charge properly.
  • Electrical Problems: There could be issues with the wiring or connections within the charging system.

• Blinking Light: A blinking light might indicate a more immediate issue or fluctuating charging levels that need attention.

What to Do if the Charging System Light Comes On

1. Check Electrical Components: Ensure that electrical components like lights and radio are working correctly. If they are dim or acting erratically, it could point to a charging issue.

2. Inspect the Battery and Alternator: Look for any visible issues like loose or corroded connections at the battery terminals or the alternator.

3. Visit a Professional: If the light remains on, it’s important to have your vehicle inspected by a professional mechanic as soon as possible. They can diagnose the exact issue and determine whether you need to replace the alternator, battery, or any other component of the charging system.

Ignoring the charging system light can lead to a dead battery or other electrical problems, so addressing it promptly is crucial to avoid being stranded.

Safety Belt Reminder

The safety belt reminder light indicates that the driver or a passenger has not fastened their seatbelt. When the vehicle is started, this light will illuminate if the system detects that a seatbelt is unbuckled. Along with the light, you may also hear a chime to further alert you to buckle up.

It's a safety feature designed to remind you and your passengers to wear seatbelts, which are crucial for reducing the risk of injury in the event of an accident.

Tire Pressure Light

The tire pressure monitor light indicates that one or more of your vehicle's tires has low air pressure. This light is part of the Tire Pressure Monitoring System (TPMS), which continuously monitors the air pressure in your tires.

If the light is illuminated, it means that at least one tire is below the recommended pressure. This could be due to a slow leak, a puncture, or natural pressure loss over time.

It's important to check and inflate your tires to the proper pressure as soon as possible. Driving on underinflated tires can lead to decreased fuel efficiency, uneven tire wear, and potentially a tire blowout, which can be dangerous. If the light continues to stay on after you've checked and adjusted the tire pressure, it may indicate a problem with the TPMS itself, and you should have it inspected by a professional.

Traction Control/StabiliTrak®

The Traction Control/StabiliTrak® light indicates the status of the vehicle's traction control and stability control systems.

When the Light Flashes:

• Traction Control Activation: If the light flashes while you're driving, it means that the Traction Control System (TCS) or StabiliTrak® is actively working to help maintain traction and stability. This usually happens in conditions like wet, icy, or slippery roads when the system detects wheel slip or loss of traction. The flashing light indicates that the system is automatically adjusting power and braking to individual wheels to help you maintain control of the vehicle.

When the Light Stays On:

• System Disabled or Malfunction: If the light stays on continuously, it may indicate that the Traction Control System and/or StabiliTrak® has been manually turned off, or there may be an issue with the system. If the light remains on even after you've tried to turn the system back on, there could be a problem that requires attention. In this case, it's advisable to have the vehicle inspected by a professional as soon as possible.

Importance of Traction Control/StabiliTrak®:

These systems are critical for maintaining control of your vehicle in challenging driving conditions. They work by detecting and reducing loss of traction, helping to prevent skidding and improving vehicle stability. If the light stays on, it's important to address the issue promptly to ensure your vehicle's safety features are fully operational.

Cruise Control

The cruise control light indicates the status of the vehicle's cruise control system, which maintains a set speed without requiring you to press the accelerator.

Types of Cruise Control Lights:

1. Cruise Control Indicator Light (Solid Green or White):

   • When It's On: This light typically appears when the cruise control system is activated, meaning you've turned it on and set a desired speed. It’s usually green or white and confirms that the system is maintaining your chosen speed.
   • What It Means: Cruise control is engaged and functioning normally. You can adjust your speed using the controls on the steering wheel.

2. Cruise Control Ready Light (Solid White):

   • When It's On: In some vehicles, there may be a separate light (often white) that indicates the system is "ready" but not yet actively controlling your speed. This means the cruise control has been turned on but you haven’t set a speed yet.

3. Cruise Control Light Flashing:

   • What It Means: If the cruise control light is flashing, it may indicate an issue or malfunction with the cruise control system. The system may not be able to engage properly, and you should have it checked by a mechanic.

Adaptive Cruise Control (If Equipped):

• In some newer Chevrolet models equipped with Adaptive Cruise Control, the system not only maintains a set speed but can also adjust speed to maintain a safe distance from the vehicle in front of you. If the light changes or includes additional symbols (like radar waves), it could indicate the system is actively adjusting your speed based on traffic conditions.

If you experience any issues with the cruise control system or see unusual behavior from the indicator light, it's best to consult your vehicle's manual or have the system inspected.

Engine Coolant Temperature

The Engine Coolant Temperature light indicates the temperature of the engine's coolant, which is critical for preventing engine overheating. When this light illuminates, it signals that the engine is running hotter than it should, and immediate attention is required.

What It Means:

1. Flashing or Solid Light:
   • Solid Light: If the light comes on and stays solid, it means the engine is overheating or the coolant temperature is higher than normal. This can be due to a number of reasons, such as low coolant levels, a faulty thermostat, or a problem with the cooling system (like a failed water pump or radiator).
2. What to Do:
   • Pull Over Safely: If the engine coolant temperature light turns on, pull over as soon as it is safe to do so and turn off the engine to avoid damage.
   • Check Coolant Levels: After the engine cools down (wait at least 15-20 minutes), check the coolant reservoir. If the coolant level is low, add the appropriate coolant recommended by your vehicle’s manual. Never open the radiator cap while the engine is hot, as this can cause serious burns.
   • Inspect for Leaks: If you see any coolant leaking under the vehicle, avoid driving it and have the vehicle inspected by a professional.

Possible Causes of Overheating:

• Low Coolant Level: This is the most common cause, which could be due to a leak or evaporation over time.
• Thermostat Issues: A malfunctioning thermostat can prevent coolant from flowing properly, causing the engine to overheat.
• Radiator Problems: A clogged or damaged radiator may prevent the engine from cooling efficiently.
• Water Pump Failure: The water pump circulates coolant through the engine, and a failure can lead to overheating.
• Cooling Fan Issues: If the fan isn't working correctly, there may be insufficient airflow to cool the engine, especially at low speeds or while idling.

Ignoring this light and continuing to drive can cause significant damage to the engine, so it's crucial to address the issue promptly. If the coolant level is fine and the light remains on, or if the engine continues to overheat, have the vehicle inspected by a mechanic as soon as possible.

Exterior Lamps

The Exterior Lamps light indicates the status of your vehicle's exterior lighting system, which includes the headlights, taillights, and other exterior lights. This light is usually shaped like a light bulb or lamp with rays extending outward, representing that exterior lights are turned on or there may be an issue with them.

What the Exterior Lamps Light Means:

1. Light On (Solid):

   • Headlights or Taillights Activated: When this light is illuminated solidly on the dashboard, it usually means that the exterior lamps (headlights, taillights, parking lights, or fog lights) are turned on. It could appear in different situations, like when the lights are switched to the automatic or manual "On" position.
   • Daytime Running Lights (DRLs): In some vehicles, this light indicates that the Daytime Running Lights (DRLs) are active. DRLs automatically turn on during the day to enhance visibility but are not as bright as regular headlights.

2. Flashing Light:

   • Lamp Failure or Issue Detected: If the exterior lamps light is flashing, it may indicate a problem with one or more exterior lights (such as a burnt-out bulb or a wiring issue). This could involve headlights, taillights, turn signals, or other exterior lights that aren't functioning correctly.

What to Do:

• Check the Exterior Lights: If the light is flashing, check all exterior lights (headlights, taillights, turn signals, and fog lights) to ensure they are functioning properly.
• Replace Bulbs if Necessary: If you find a burnt-out bulb, replace it as soon as possible. Operating a vehicle with malfunctioning exterior lights can reduce visibility and is often against traffic laws.
• Inspect Fuses or Wiring: If all bulbs are working but the light persists, there could be an issue with the wiring or a blown fuse. In this case, it's best to have the system inspected by a professional.

Properly functioning exterior lights are critical for your safety and for other drivers on the road, as they help ensure visibility in various driving conditions. If you can't identify the issue, have the lighting system checked by a mechanic.

Fuel Gauge

The Fuel Gauge light in a Chevrolet indicates that the fuel level in the tank is low and that you should refuel soon. It is a critical reminder designed to prevent you from running out of gas while driving.

What the Fuel Gauge Light Means:

1. Light On:
   • When the fuel gauge light comes on, it means the fuel level in your tank is low. You generally have a limited amount of fuel left, usually between 30 to 50 miles (48 to 80 km) depending on the vehicle model, driving conditions, and remaining fuel level.
2. What to Do:
   • Refuel as Soon as Possible: When this light comes on, you should refuel as soon as it’s convenient to avoid running out of gas, which can cause engine stalling and may leave you stranded.
   • Check the Fuel Gauge: The fuel gauge should give you an estimate of how much fuel is left in the tank. While the vehicle will still run, it's important not to delay filling up, especially if you're in an area where gas stations may not be nearby.

Importance of Refueling Promptly:

• Avoid Fuel Pump Damage: Continuously running your vehicle on a low fuel level can cause the fuel pump to overheat or fail over time because the fuel acts as a coolant for the pump.
• Potential Engine Stalling: If you run completely out of fuel, the engine will stall, and this can be particularly dangerous if it happens in the middle of traffic or in isolated areas.

The fuel gauge light is a straightforward indicator that helps prevent these issues, so refuel promptly when it comes on.

Fuses

The Fuse light or a fuse-related warning light in a Chevrolet indicates that there may be an issue with one or more of the vehicle's fuses. While not all vehicles have a specific "Fuses" warning light, some modern cars may display a general electrical warning light or provide a message on the dashboard related to electrical system issues, which can include fuse problems.

What the Fuse-Related Warning Light Means:

1. Blown Fuse:
   • A blown fuse occurs when there is an electrical overload in a circuit, causing the fuse to "blow" or break the circuit to prevent damage to the system. If the vehicle detects a problem with a fuse, it may illuminate a warning light or display an error message on the dashboard.
2. Electrical Malfunctions:
   • If certain systems, such as the headlights, radio, power windows, or other electrical components, stop working, it could indicate a blown fuse. In this case, you may not see a specific "Fuses" light, but the system affected by the blown fuse will malfunction, and the vehicle may give you a general electrical system warning.

What to Do If You Suspect a Blown Fuse:

1. Check the Vehicle Manual:

   • Consult your owner's manual to locate the fuse box. The manual will also have a diagram showing which fuse corresponds to each electrical component.

2. Inspect the Fuses:

   • Open the fuse box (usually located under the dashboard or in the engine compartment) and visually inspect the fuses. A blown fuse will typically have a broken metal filament inside the fuse, or it may appear discolored.

3. Replace the Fuse:

   • Replace the blown fuse with one of the same amperage rating (this is important to avoid further damage). Fuses are often color-coded to make identifying the correct amperage easier.

4. Check the System:

   • After replacing the fuse, check if the electrical component that was malfunctioning is now working properly. If the fuse blows again quickly, there may be a deeper electrical issue, such as a short circuit, that will need to be diagnosed by a professional.

If the Warning Light Persists:

• If the fuse warning light (or general electrical system warning) stays on after checking or replacing fuses, it’s a sign that there may be a larger electrical problem. In this case, it’s best to have the vehicle inspected by a qualified mechanic or dealership.

Fuses protect your vehicle’s electrical systems, so addressing any fuse-related issues promptly helps prevent further damage to more sensitive electronic components.

Headlamp High/Low-Beam Changer

The Headlamp High/Low-Beam Changer light in a Chevrolet indicates the status of your vehicle’s high beams or low beams, signaling whether you are using high beams for better visibility or low beams for standard driving conditions.

What the Headlamp High/Low-Beam Changer Light Looks Like:

• High-Beam Indicator Light: This symbol typically looks like a blue headlamp icon with horizontal lines angled outward, representing the high beams.
• Low-Beam Indicator Light: This symbol is usually a green or white headlamp icon with horizontal lines pointing down, indicating that the low beams are active.

What the Headlamp High/Low-Beam Changer Light Means:

1. High-Beam Light On (Blue):

   • When the blue high-beam indicator light is on, it means the high beams are activated. High beams provide extra visibility for driving in dark conditions or areas with no street lighting.
   • Use high beams in:
     • Rural or unlit roads.
     • Areas with low traffic.
   • Do not use high beams in:
     • Areas with oncoming traffic, as it can blind other drivers.
     • Well-lit roads or when following another vehicle closely.

2. Low-Beam Light On (Green or White):

   • The green or white low-beam indicator light shows that the standard low beams are on. Low beams are used for everyday driving, including urban settings, highways, and well-lit roads, as they provide sufficient illumination without causing glare to other drivers.

Automatic High Beam (If Equipped):

• Some modern Chevrolet vehicles come with automatic high beams. If this feature is enabled, the system will automatically switch between high and low beams based on traffic conditions and lighting. The high-beam indicator light may flash or automatically turn on and off as the system adjusts the beams.

How to Switch Between High and Low Beams:

• Typically, you switch between high and low beams by pushing or pulling the turn signal lever:
  • Push Forward: Activates high beams.
  • Pull Back: Switches back to low beams or flashes the high beams (sometimes called "flashing the brights" for signaling purposes).

What to Do If the Indicator Light Malfunctions:

• If the high/low-beam indicator light doesn’t function correctly or stays on when it shouldn't, there could be an issue with the headlamp system or the indicator itself. In this case, you may need to have the vehicle’s electrical system or headlamp control system checked by a professional.

Having properly functioning high and low beams is essential for safe driving, especially in low-visibility conditions. Make sure to adjust your lights based on road conditions and the presence of other vehicles.

Latch System / Child Restraints

The Latch System / Child Restraints light in a Chevrolet typically indicates the status or a problem with the LATCH system (Lower Anchors and Tethers for CHildren), which is designed to help secure child safety seats in the vehicle.

What the Light Means:

1. Light On (Solid or Flashing):

   • Potential Child Restraint System Issue: If this light comes on or flashes, it might indicate that there is an issue with the child restraint system or that a child seat isn’t properly secured to the LATCH anchors.
   • Improper Installation: It can also be a warning that a child safety seat is not properly installed, or the tethers/anchors are not correctly latched.

2. Light Off:

   • When the light is off, it generally means that the LATCH system and child restraint system are functioning properly, or there is no child seat currently detected.

What to Do If the Light Comes On:

1. Check the Installation of the Child Seat:

   • Inspect the LATCH System: Ensure that the child seat is securely fastened using the LATCH system, including both the lower anchors and the top tether if your vehicle and child seat are equipped with them.
   • Refer to the Owner’s Manual: Both your vehicle's and the child seat’s manuals provide detailed instructions for proper installation.

2. Ensure Proper Restraint:

   • Make sure the child seat is snugly installed with no excessive movement (less than 1 inch of movement from side to side or front to back). Double-check that all tethers and anchors are properly latched.

3. Check for Faulty Sensors:

   • If the child seat is properly installed and the light remains on, there could be an issue with the sensor or the LATCH system itself. In this case, it's a good idea to have the system inspected by a qualified mechanic or dealership.

Importance of the LATCH System:

The LATCH system is designed to provide an easier and more secure way to install child safety seats without relying on the vehicle’s seat belts. Ensuring that your child seat is correctly installed using this system is crucial for the safety of the child in the event of a crash.

If the light persists despite correct installation, it’s important to address it immediately to ensure the child restraint system is functioning as intended.

Malfunction Indicator

The Malfunction Indicator Light (MIL) in a Chevrolet, also known as the "Check Engine" light, alerts the driver to potential issues with the vehicle’s engine, emission system, or other key systems. It’s an important warning that something in the engine management system may not be functioning correctly.

What the Light Means:

1. Solid Light:
   • Minor Issue Detected: If the MIL is solid, it means the engine control system has detected a minor problem. The vehicle may still be drivable, but there could be an issue that affects fuel efficiency, emissions, or performance.
   • Possible Causes:
     • Loose or missing gas cap.
     • Minor engine performance issues (e.g., misfire, sensor problems).
     • Exhaust/emission control system issue (e.g., catalytic converter, oxygen sensor).
2. Flashing Light:
   • Serious Issue Detected: A flashing MIL indicates a more serious issue, often related to the engine misfiring, which could cause damage to the catalytic converter if ignored.
   • What to Do:
     • Reduce Speed and Power: Slow down and avoid heavy acceleration or high speeds.
     • Get Immediate Attention: Driving with a flashing MIL can lead to severe engine damage, so have your vehicle inspected by a mechanic as soon as possible.

What to Do When the Malfunction Indicator Light Comes On:

1. Check the Gas Cap:

   • A loose or damaged gas cap is one of the most common (and easily fixable) reasons for a check engine light to come on. Tighten the gas cap, and if that was the issue, the light may go off after a few trips.

2. Monitor Vehicle Behavior:

   • If the light is on but the vehicle seems to be running normally, you can continue driving but should have the issue diagnosed soon to prevent further damage.
   • If the vehicle shows signs of trouble (e.g., reduced power, rough idling, or stalling), it’s best to stop driving and have the vehicle checked immediately.

3. Scan for Diagnostic Trouble Codes (DTCs):

   • A mechanic or auto parts store can use an OBD-II scanner to retrieve the Diagnostic Trouble Codes (DTCs) stored in the vehicle’s computer. These codes will help identify the specific problem triggering the check engine light.

4. Seek Professional Diagnosis:

   • Whether the light is solid or flashing, it’s important to have your vehicle inspected by a professional as soon as possible. Ignoring the MIL could lead to more expensive repairs down the road.

Common Causes of the Malfunction Indicator Light:

• Loose or Faulty Gas Cap
• Oxygen Sensor Failure
• Faulty Spark Plugs or Ignition Coils
• Catalytic Converter Issues
• Mass Airflow Sensor Problems
• Emissions Control System Malfunctions

Importance of the MIL:

The malfunction indicator light is an essential part of your vehicle’s onboard diagnostics system. While some issues may be minor, others can lead to significant engine damage or reduced fuel efficiency if not addressed promptly.

In summary, if the MIL comes on, it’s important to take it seriously and investigate the issue, especially if the light is flashing.