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2023 Tahoe Headlights Flickering and DRL Malfunction

0

Mark S. · rep 0 · May 22, 2:36 AM · 1 replies · solved · Question

Vehicle: 2023 Chevrolet Tahoe RST

I just got a brand new 2023 Chevrolet Tahoe RST, and I'm already having electrical issues, which is really frustrating for a new vehicle. The headlights, especially the driver's side, sometimes flicker while driving, almost like they're losing power for a split second.

Occasionally, I also get a "Service DRL System" message on the dash. It's concerning, especially at night, as I don't want my headlights to go out completely. Has anyone else experienced this with a newer Tahoe, and what could be causing it?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 2:36 AM

0

ClearTheCode admin answer:

It's definitely concerning to experience electrical issues, especially with a brand new 2023 Chevrolet Tahoe RST. Headlight flickering and DRL (Daytime Running Light) malfunction messages often point to issues within the vehicle's complex lighting control system. Given it's a new vehicle, it's likely a manufacturing defect or a software-related problem.

  1. Lighting Control Module/BCM:

    • Modern vehicles like your Tahoe use sophisticated modules (often the Body Control Module or a dedicated lighting control module) to manage headlight and DRL functions. A fault within this module could cause intermittent power delivery or incorrect commands to the lights.

  2. Wiring Harness or Connector Issues:

    • Even in new vehicles, a loose pin in a connector, a partially crimped wire, or a compromised section of the wiring harness can cause intermittent electrical contact, leading to flickering. This is more common on one side if the issue is isolated to a specific headlight.

  3. Headlight Assembly Fault:

    • The headlight assembly itself, including the LED drivers (if applicable) or internal wiring, could have a defect causing the flickering. The DRL system message further supports an issue within the headlight unit or its immediate control circuit.

  4. Software Glitch:

    • Sometimes, a software bug in the vehicle's electrical system can cause these types of intermittent issues. A dealership might have a software update available to address known glitches.

OBD Codes: While not always generic OBD-II codes, a dealership's diagnostic scanner can pull specific 'B' codes (Body codes) related to lighting, such as B2580 (Headlamp Control Circuit Low) or B2585 (Headlamp Control Circuit High), which would help pinpoint the exact problem.

When to See a Shop: Since your Tahoe is brand new, this issue should be covered under warranty. Do not attempt to diagnose or repair this yourself, as it could void parts of your warranty. Schedule an appointment with your Chevrolet dealership immediately. They have the specialized diagnostic tools and technical service bulletins (TSBs) to properly identify and rectify the problem, ensuring your safety and the proper function of your vehicle's lighting system.

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