What should be checked if the bed lighting system is not functioning on a 2018 Chevrolet Silverado 1500?

Check the Fuse
 

• Locate and inspect the fuse box under the hood and the one inside the cabin.
• Identify the specific fuse related to the bed lighting system by consulting the owner's manual or fuse box diagram.
• If the fuse is blown, replace it with one of the same amperage rating.

Inspect the Bed Light Switch
 

• Ensure the bed light switch is not damaged and is functioning correctly.
• Toggle the switch multiple times to confirm it's not stuck or malfunctioning.

Check the Wiring and Connections
 

• Visually inspect the wiring for any signs of damage, such as frayed wires or corrosion.
• Ensure all connections are secure and not loose.
• Look for any disconnected wires or plugs that may have come loose.

Examine the Bed Lights
 

• Check if the bed light bulbs are burnt out and need replacement.
• Make sure the light housings are clean and not filled with dirt or moisture.

Test the Bed Light Relay
 

• Locate the bed light relay in the fuse box as mentioned in the owner's manual.
• Swap the relay with another identical one in the fuse box to see if the lights start working.

Consult the Vehicle Manual
 

• Refer to the Chevrolet Silverado 1500 owner’s manual for specific troubleshooting steps related to the bed lighting system.
• Follow any additional recommended steps outlined in the manual.

Consider a Professional Inspection
 

• If all else fails, take the vehicle to a certified mechanic or the dealership for a thorough inspection.
• They may need to check the vehicle’s Body Control Module (BCM) for any issues.