1. Check the Fuse:
* Locate the fuse box: Consult your owner's manual to find the location of the fuse box (usually under the hood or in the dashboard).
* Identify the DRL fuse: The owner's manual will also show you which fuse is responsible for the DRLs. It might be labeled "DRL," "Daytime Running Lamps," or something similar.
* Inspect the fuse: Check if the fuse is blown (the wire inside will be broken or melted). If it is, replace it with a fuse of the same amperage.
2. Check the Light Bulbs:
* Inspect the bulbs: Check the bulbs in the headlight assemblies. These are often the ones used for DRLs, although some models use separate bulbs. Look for any signs of damage or burning.
* Replace if necessary: Replace any burned-out bulbs with new ones of the correct type. Again, your owner's manual will specify the correct bulb type.
3. Check the DRL System Setting (if applicable):
* Some vehicles have a setting to turn DRLs on or off. Check your vehicle's infotainment system or settings menu to make sure DRLs are enabled.
4. Check the Light Switch:
* Ensure the light switch is in the correct position. Although it seems obvious, sometimes the switch might be inadvertently set to a position that disables DRLs. Try different positions.
5. Check for Wiring Issues (Advanced):
* This is more complex and requires some electrical knowledge. Look for any loose or damaged wiring in the headlight assemblies or near the fuse box. If you're not comfortable working with car wiring, take it to a mechanic.
6. Faulty DRL Module (Advanced):
* In some cases, a faulty DRL control module could be the culprit. This is an advanced issue and requires professional diagnosis and repair.
7. Consult your Owner's Manual:
* Your owner's manual is your best friend. It contains detailed information specific to your model year and trim level.
If you've tried these steps and your DRLs are still not working, it's best to take your Chevy Suburban to a qualified mechanic for diagnosis and repair. They have the tools and expertise to identify more complex issues.
