B0414 on GMC
Manufacturer-Specific Body Code (GM: A/C Air Temperature Left Feedback Circuit Actuator Range/Performance)
B0414 on GMC vehicles indicates manufacturer-specific body code (gm: a/c air temperature left feedback circuit actuator range/performance). Au7o has documented this code across 3 GMC models — most commonly on Sierra 1500, Sierra 3500HD, Yukon XL. B0414 is a body code most common on GM vehicles, indicating a range/performance problem with the left-side (driver) automatic climate-control temperature blend-door actuator feedback circuit. The HVAC control module commands the blend-door actuator and reads its position feedback; this code sets when the reported position doesn't match the commanded position or is out of range. Symptoms are usually limited to incorrect or uneven cabin temperature on the left side, sometimes with clicking from behind the dash. It is a comfort-system issue rather than a safety concern. The exact definition should be confirmed against the specific vehicle. Typical repair costs on GMC range from $150 to $900, depending on the specific model and root cause.
Common Causes of B0414
- •Faulty left temperature blend-door actuator
- •Binding, broken, or stuck blend door
- •Wiring or connector fault in the actuator feedback circuit
- •Worn actuator position-feedback contacts
- •Stripped actuator or door gears
- •Poor ground or low voltage to the actuator
- •Faulty HVAC control module
B0414 on GMC by Model
GMC Sierra 1500(1 issue)
- Blend Door / HVAC Actuator Failure Causing Clicking Behind Dash and Incorrect Air Temperature or Mode2000-2013
Sierra owners across both GMT800 and GMT900 generations frequently report small electric HVAC actuators stripping internal gears or losing calibration. The result is a repetitive clicking or tapping noise from the dash, air stuck on defrost or floor, or one side blowing hot while the other blows cold. This is one of the most common non-drivetrain complaints on these trucks and is heavily documented in owner forums and repair databases.
GMC Sierra 3500HD(1 issue)
- Blend door actuator failure causing temperature/airflow control problems2007-2019
Sierra 3500HD owners report clicking/ticking behind the dash and inability to control cabin temperature due to HVAC blend door or mode door actuator failures. GM service bulletins and owner reports describe stripped actuator gears or actuator motor failures that can leave the truck stuck on hot, cold, defrost, or a single vent mode.
GMC Yukon XL(1 issue)
- Blend Door / HVAC Mode Actuator Failure Causing Incorrect Airflow or Temperature Control2000-2006
Owners frequently report clicking behind the dash, air stuck on defrost or floor, or one side blowing the wrong temperature due to failed HVAC actuators. On Yukon XL models with front and rear climate systems, the mode and blend door actuators can strip gears or lose calibration over time. This is distinct from compressor failure and is a common repair on aging GMT800 SUVs.
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View B0414 across all makes →Frequently Asked Questions
What does B0414 mean on GMC?▼
B0414 stands for "Manufacturer-Specific Body Code (GM: A/C Air Temperature Left Feedback Circuit Actuator Range/Performance)." B0414 is a body code most common on GM vehicles, indicating a range/performance problem with the left-side (driver) automatic climate-control temperature blend-door actuator feedback circuit. The HVAC control module commands the blend-door actuator and reads its position feedback; this code sets when the reported position doesn't match the commanded position or is out of range. Symptoms are usually limited to incorrect or uneven cabin temperature on the left side, sometimes with clicking from behind the dash. It is a comfort-system issue rather than a safety concern. The exact definition should be confirmed against the specific vehicle. On GMC specifically, this code is documented across 3 models.
What causes B0414 on GMC vehicles?▼
Common causes on GMC: Faulty left temperature blend-door actuator, Binding, broken, or stuck blend door, Wiring or connector fault in the actuator feedback circuit, Worn actuator position-feedback contacts, Stripped actuator or door gears. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix B0414 on a GMC?▼
Repair costs on GMC range from $150 to $900, depending on the specific model and root cause.
Which GMC models have B0414 documented?▼
Au7o has documented B0414 on 3 GMC models: Sierra 1500, Sierra 3500HD, Yukon XL.