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.
2021 Buick Envision Avenir, AWDFACTORY OEM SERVICE PROCEDURE
Coolant Temperature Sensor: Remove & Replace
FUEL INJECTION - GAS, PORT TYPE
| Applies To | Note | Standard Hours | Warranty Hours | Skill Level |
|---|---|---|---|---|
| Engine Control,Coolant Temperature Sensor,In Block | Includes: R&I Air Cleaner. Includes: R&I Intake Manifold. Includes: R&I Alternator. Includes: Drain and refill Cooling System. | 4.7 | B | |
| Engine Control,Engine Coolant Temperature Sensor,At Engine Coolant Heater Exhaust Pipe,Both | Includes: Bleed Cooling System. | 0.8 | B | |
| Engine Control,Engine Coolant Temperature Sensor,At Engine Coolant Heater Exhaust Pipe,One,Rear | Includes: Bleed Cooling System. | 0.5 | 0.3 | B |
| Engine Control,Engine Coolant Temperature Sensor,At Engine Coolant Heater Exhaust Pipe,One,Top | Includes: Bleed Cooling System. | 0.6 | 0.4 | B |
| Engine Coolant Temperature Sensor,At Heater Outlet Hose | Includes: R&I Air Cleaner. Includes: Drain and refill Cooling System. | 1.0 | B | |
| Combination Procedure: THROTTLE BODY ASSEMBLY: Reset: | ||||
| Throttle Body Idle Air Flow Compensation Reset | Includes: Additional time for use of scan tool to perform this procedure. | 0.2 | B | |
Factory Service Tools
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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.