Decoding Your Sierra 2500's Dashboard Signals

Discover what your GMC Sierra 2500's dashboard is trying to tell you. Our comprehensive guide helps you understand each warning light, ensuring you're always in control and ready for the road ahead.

Your GMC Sierra 2500: Communicating Through Lights

Your truck's dashboard is its voice. Learn to listen and respond, keeping your Sierra 2500 running smoothly and safely for years to come.

	GMC Sierra 2500 Blind Spot Indicator Warning Light The Blind Spot Monitor (BSM) light indicates a vehicle in your blind spot; do not change lanes and check your mirrors.
	GMC Sierra 2500 Low Fuel Warning Light The fuel warning light indicates low fuel levels; refill your tank, and if it persists after refueling, have it checked.
	GMC Sierra 2500 Door Open Warning Light The Door Open Warning Light indicates one or more doors are not properly closed; stop and check all doors.
	GMC Sierra 2500 Engine Oil Pressure Warning Light The red oil pressure light indicates low oil pressure; pull over safely, check oil level, and seek immediate assistance if necessary.
	GMC Sierra 2500 Gearbox Clutch Warning Light The automatic transmission warning light indicates a transmission issue; check the vehicle immediately to diagnose and prevent further damage.
	GMC Sierra 2500 Hood Open Warning Light The bonnet open warning light indicates the bonnet is not closed properly; check and secure it before driving.
	GMC Sierra 2500 Service Stop Start System Warning Light The Start/Stop System warning light indicates a problem with the system, not the starter motor; have it inspected.
	GMC Sierra 2500 Brake Warning Light The brake warning light indicates a serious issue with the braking system; pull over immediately and seek professional assistance.
	GMC Sierra 2500 ABS Warning Light The ABS warning light indicates a potential problem with the Anti-lock Braking System, requiring immediate inspection and possible repair.
	GMC Sierra 2500 Brake Pads Warning Light A yellow brake disc with an exclamation mark typically indicates low brake pads, requiring servicing to prevent further wear.
	GMC Sierra 2500 Ice Warning Light If you see a snowflake or ice crystal symbol illuminated on your instrument panel, it warns of approaching freezing temperatures, indicating icy conditions; be cautious and prepare for slippery roads.
	GMC Sierra 2500 Cruise Control Malfunction Warning Light An orange or yellow cruise control light indicates a fault or standby mode, requiring diagnosis with an OBD-II code reader.
	GMC Sierra 2500 High Beams Warning Light The high beam indicator light, typically a blue symbol with horizontal lines, indicates that your high beams are currently active.
	GMC Sierra 2500 Seat Belt Reminder Warning Light The seatbelt warning light indicates a passenger's seatbelt is not properly fastened, requiring immediate correction to ensure safety.
	GMC Sierra 2500 Forward Collision Warning (FCW) Light The warning light indicates a potential forward collision; apply the brakes to slow down and avoid the collision.
	GMC Sierra 2500 Battery Charge Warning Light The battery warning light indicates the battery is not charging; stop driving and have the alternator and wiring checked immediately.
	GMC Sierra 2500 Tire Pressure Monitoring System (TPMS) Warning Light The TPMS warning light indicates low tire pressure or a malfunctioning system, requiring immediate tire pressure adjustment or system check.
	GMC Sierra 2500 Turn Signal Indicator Light A green arrow flashing on the dashboard indicates the turn signal is on; if both arrows blink simultaneously, hazard lights are activated.
	GMC Sierra 2500 Loose Fuel Filler Cap Warning Light The fuel cap warning light indicates a loose gas cap; tighten it, and if it persists, inspect for other system leaks.
	GMC Sierra 2500 Power Steering Fault Warning Light The power steering warning light indicates a system issue, often low fluid; pull over and check the reservoir immediately.
	GMC Sierra 2500 Lane Departure Warning Light The lane departure warning light indicates your vehicle is drifting out of its lane; steer back into your lane immediately.
	GMC Sierra 2500 Exterior Light Failure Warning Light The headlight warning light indicates a faulty exterior light; inspect and replace the bulb or consult a mechanic promptly.
	GMC Sierra 2500 Coolant Temperature Warning Light The engine coolant temperature light indicates overheating; pull over, turn off the engine, and seek immediate professional assistance.
	GMC Sierra 2500 Electronic Throttle Control Warning Light The Electronic Throttle Control (ETC) light indicates a problem with the accelerator pedal's electronic system, requiring immediate inspection.
	GMC Sierra 2500 Immobilizer Warning Light The immobilizer warning light indicates the system cannot recognize the key, requiring assistance from a vehicle expert for repair.
	GMC Sierra 2500 Headlight On Indicator Warning Light This indicator light means your vehicle's headlights are turned on, excluding daytime running lights.
	GMC Sierra 2500 Front Fog Indicator Light A semicircle with wavy lines on your dashboard indicates that your fog lamps are on; switch them off when visibility improves.
	GMC Sierra 2500 Oil Change Reminder Warning Light The yellow oil symbol on your dashboard indicates low oil level or need for an oil change; check and refill or change oil and filter.
	GMC Sierra 2500 Airbag Warning Light The supplemental airbag warning light indicates a malfunction in the airbag system, requiring immediate servicing by a Nissan dealer.
	GMC Sierra 2500 Service Adaptive Cruise Control Warning Light The adaptive cruise control (ACC) warning light indicates an issue, such as faulty sensors or obstructed radar, requiring system check.
	GMC Sierra 2500 All-Wheel Drive System (AWD) Indicator Light The AWD warning light indicates a system malfunction, requiring inspection and possible repair to restore all-wheel drive functionality.
	GMC Sierra 2500 Check Engine Warning Light The check engine light signals a problem, ranging from a loose gas cap to a serious engine issue, requiring immediate service.
	GMC Sierra 2500 Transmission Temperature Warning Light The transmission temperature warning light indicates overheating, risking transmission failure; stop and let the vehicle cool down.
	GMC Sierra 2500 Electric Parking Brake Warning Light The parking brake warning light indicates the parking brake is engaged or faulty; release the brake and check for issues if it persists.
	GMC Sierra 2500 Electronic Stability Control Warning Light The traction control light indicates normal operation in low traction conditions when flashing, but a steady light signals a system fault needing repair.
	GMC Sierra 2500 Engine Air Filter Warning Light The dirty air filter warning light indicates a clogged air filter, requiring timely replacement to prevent engine complications.
	GMC Sierra 2500 Low Washer Fluid Warning Light The windshield washer fluid warning light indicates that your windshield washer fluid is low and needs to be refilled.

Quick Answers to Your Sierra's Signals

Get instant clarity on your GMC Sierra 2500's most common dashboard alerts. Find out what they mean and what action you need to take.

1. What does the check engine light mean on a GMC Sierra 2500?
   It indicates a potential engine or emissions issue. Have it checked soon.
2. How serious is the oil pressure light in a Sierra 2500?
   Very serious. Stop driving immediately and check oil levels to prevent engine damage.
3. What should I do if the ABS light comes on in my Sierra 2500?
   Drive cautiously and have the braking system inspected as soon as possible.
4. Is it safe to drive with the battery light on in a GMC Sierra 2500?
   Not for long. The charging system may fail, leaving you stranded.
5. What does the tire pressure light mean on a Sierra 2500?
   One or more tires are significantly under-inflated. Check and adjust tire pressure.
6. How urgent is the airbag warning light in a GMC Sierra 2500?
   Fairly urgent. Have it checked soon, as it may indicate a non-functional airbag system.
7. What does the traction control light mean on a Sierra 2500?
   It indicates the system is active or there's an issue with traction control.