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 GMC Yukon AT4FACTORY OEM SERVICE PROCEDURE
Coolant Temperature Sensor: Remove & Replace
WARNING: This page is about the Yukon Denali, 3.0L Eng VIN T, 4WD, which is a different variant/trim than selected.
FUEL INJECTION - ELECTRONIC, DIESEL
| Applies To | Note | Standard Hours | Warranty Hours | Skill Level |
|---|---|---|---|---|
| 3.0L Eng, At Charge Air Cooler Coolant Hose | Includes: Drain and Refill Coolant Turbocharger System. | 0.9 | 0.7 | B |
| 3.0L Eng, At Engine Block,Both,Front & Rear | Includes: Drain and refill Cooling System. Includes: R&I Fender Liner. | 1.4 | B | |
| 3.0L Eng, At Engine Block,One,Front or Rear | Includes: Drain and refill Cooling System. Includes: R&I Fender Liner. | 1.3 | 0.8 | B |
| 3.0L Eng, At Radiator | Includes: Drain and refill Cooling System. | 1.1 | 0.7 | B |
| 3.0L Eng, At Water Pump Inlet Pipe,w/Air Suspension | Includes: Drain and refill Cooling System. Includes: R&I Fender Liner. | 1.8 | 1.1 | B |
| 3.0L Eng, At Water Pump Inlet Pipe,w/o Air Suspension | Includes: Drain and refill Cooling System. Includes: R&I Fender Liner. | 1.7 | 1.1 | B |
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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