What does B2575 mean on a Chevy?

B2575. Left Headlamp Control Circuit Malfunction. Applies to Silverado, Sierra, Tahoe, Equinox, Traverse.

What causes B2575 on a Chevy?

Open or high resistance in the left low-beam headlamp control circuit from the BCM Chafed headlamp harness shorting to ground near the radiator support Corroded headlamp connector terminals at the left headlamp assembly Failed left low-beam bulb or LED driver opening the control circuit

How do I fix B2575 on a Chevy?

Command the left low beam on with a Tech2 or GDS2 and check for voltage at the headlamp connector Inspect the headlamp harness routing for chafing, especially near sharp brackets Clean and reseat the left headlamp connector; check terminal tension Test the control circuit for opens and shorts to ground with a multimeter Replace the bulb or headlamp assembly only after the circuit tests good

Code

B2575

Left Headlamp Control Circuit Malfunction

Category: Body
Severity: Body Warning Light
Applies to: Silverado, Sierra, Tahoe, Equinox, Traverse
Related: No single generic twin. See OBD Codes List

What it means

B2575. Left Headlamp Control Circuit Malfunction. This Chevy-enhanced code applies to Silverado, Sierra, Tahoe, Equinox, Traverse.

Findings, check these first

Open or high resistance in the left low-beam headlamp control circuit from the BCM
Chafed headlamp harness shorting to ground near the radiator support
Corroded headlamp connector terminals at the left headlamp assembly
Failed left low-beam bulb or LED driver opening the control circuit

Standard procedure

Command the left low beam on with a Tech2 or GDS2 and check for voltage at the headlamp connector
Inspect the headlamp harness routing for chafing, especially near sharp brackets
Clean and reseat the left headlamp connector; check terminal tension
Test the control circuit for opens and shorts to ground with a multimeter
Replace the bulb or headlamp assembly only after the circuit tests good

Look up another code

Press / to jump to the box. Chevy-enhanced powertrain, body, chassis and network codes.

Sources and review

Review: no source links are recorded for this entry.

Last updated 2026-09-25.

Report a correction for B2575. Include your vehicle, the issue and a source if you have one.