Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2012 Buick Regal BaseFACTORY OEM SERVICE PROCEDURE
HVAC Module Components
HVAC Module Components
| Component Name | Callout |
|---|---|
| B7J Air Temperature Sensor - Duct Right Upper | 1 |
| B39 A/C Evaporator Temperature Sensor | 2 |
| M4 Air Inlet Door Actuator | 3 |
| M46 Air Recirculation Door Actuator | 4 |
| K8 Blower Motor Control Module | 5 |
| M8 Blower Motor | 6 |
| K33 HVAC Control Module | 7 |
| B7D Air Temperature Sensor - Duct Left Lower | 8 |
| M6L Air Temperature Door Actuator - Left | 9 |
| M37 Mode Door Actuator | 10 |
| B7H Air Temperature Sensor - Duct Left Upper | 11 |
| M6R Air Temperature Door Actuator - Right | 12 |
| B7E Air Temperature Sensor - Duct Right Lower | 13 |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.