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.
2017 Cadillac CTS Base, AWDFACTORY OEM SERVICE PROCEDURE
HVAC Assembly Components
HVAC Assembly Components
| Items |
|---|
| 1. M37 Mode Door Actuator M37 Mode Door Actuator |
| 2. M37B Mode Door Actuator - Auxiliary (CJ4) M37B Mode Door Actuator - Auxiliary (CJ4) |
| 3. M6L Air Temperature Door Actuator - Left M6L Air Temperature Door Actuator - Left |
| 4. M46 Air Recirculation Door Actuator M46 Air Recirculation Door Actuator |
| 5. B39 A/C Evaporator Temperature Sensor B39 A/C Evaporator Temperature Sensor |
| 6. M8 Blower Motor M8 Blower Motor |
| 7. M6B Air Temperature Door Actuator - Auxiliary (CJ4) M6B Air Temperature Door Actuator - Auxiliary (CJ4) |
| 8. B7E Air Temperature Sensor - Duct Right Lower B7E Air Temperature Sensor - Duct Right Lower |
| 9. B7D Air Temperature Sensor - Duct Left Lower B7D Air Temperature Sensor - Duct Left Lower |
| 10. M6R Air Temperature Door Actuator - Right M6R Air Temperature Door Actuator - Right |
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.