Coolant temperature sensor replacement 2015-2020 Yukon, Tahoe, Suburban, Sierra Silverado GMC Chevy

Introduction

This tutorial will guide you through the process of replacing the coolant temperature sensor in your 2015-2020 Yukon, Tahoe, Suburban, Sierra, or Silverado. A faulty temperature sensor can lead to issues like incorrect temperature readings, overheating, or overcooling, which can trigger the engine fan to run at maximum speed as a safety precaution. By following these steps, you can ensure your vehicle operates efficiently.

Step 1: Gather Your Tools and Parts

Before starting the replacement, ensure you have the necessary tools and replacement parts.

• Parts Required:

  • ACDelco Gold 213-4514 Engine Coolant Temperature Sensor
  • Optional: Dorman 902-2090 Engine Coolant Thermostat Housing Assembly

• Tools Needed:

  • Socket set
  • Wrenches
  • Screwdrivers
  • Pliers
  • Torque wrench (if applicable)
  • Safety gloves and goggles

Step 2: Locate the Coolant Temperature Sensor

To replace the coolant temperature sensor, you first need to locate it in your vehicle.

• Open the hood and secure it.
• Identify the engine block and locate the sensor, which is typically found near the thermostat housing.
• Refer to your vehicle’s service manual for specific location details if needed.

Step 3: Disconnect the Battery

Safety is paramount when working on your vehicle.

• Locate the vehicle's battery.
• Use a wrench to remove the negative terminal to prevent any electrical shorts while working on the sensor.

Step 4: Drain the Coolant (if necessary)

Depending on your vehicle’s design, you may need to drain some coolant to avoid spills.

• Place a drain pan under the radiator.
• Open the radiator drain valve or remove the lower radiator hose to allow coolant to flow into the pan.
• Ensure to properly dispose of old coolant according to local regulations.

Step 5: Remove the Old Temperature Sensor

Now you can proceed to remove the faulty temperature sensor.

• Disconnect the electrical connector from the sensor by pressing the tab and pulling it off.
• Use a socket or wrench to unscrew the old sensor from its position.
• If the sensor is stuck, gently wiggle it or use pliers to help loosen it.

Step 6: Install the New Temperature Sensor

Once the old sensor is removed, you can install the new one.

• Apply a small amount of thread sealant to the threads of the new temperature sensor (if recommended).
• Screw the new sensor into the engine block hand-tight, then use a torque wrench to tighten it to the manufacturer’s specifications.
• Reconnect the electrical connector securely.

Step 7: Refill the Coolant

If you drained coolant earlier, you’ll need to refill it now.

• Close the radiator drain valve or reattach the lower radiator hose.
• Refill the radiator with the appropriate type and mixture of coolant for your vehicle.
• Start the engine and allow it to reach operating temperature, checking for leaks.

Step 8: Reconnect the Battery

Once everything is secure, you can reconnect the battery.

• Reattach the negative terminal and tighten it with a wrench.

Step 9: Test the System

Ensure everything is functioning correctly.

• Start the vehicle and monitor the temperature gauge.
• Check for any error codes (like P0118 or P0119) that might indicate a problem.

Conclusion

Replacing the coolant temperature sensor is a straightforward process that can save you from potential engine damage. By following these steps, you ensure that your vehicle's cooling system operates efficiently. If you continue to experience issues, consider checking the thermostat or consulting a professional mechanic for further assistance.