GMC Acadia Ambient Air Temperature Sensor: A Guide for 2013-2023 Models
Is your Acadia's outside temperature display wrong or is the A/C acting up? Your ambient air temperature sensor may be the culprit.
- A bad sensor primarily affects the dashboard temperature display and the automatic A/C function.
- This is a very easy and inexpensive DIY replacement, usually located behind the front grille.
- For 2017+ models, check the wiring connector for corrosion, as noted in GM TSB 16-NA-051.
- Quality aftermarket brands like Dorman and Standard Ignition are reliable and affordable choices for this part.
Is Your GMC Acadia's Temperature Sensor Failing?
A faulty ambient air temperature sensor can cause more than just an incorrect number on your dash; it can directly impact how your automatic climate control system performs. Because this sensor is usually located behind the front grille, it's exposed to road debris, moisture, and potential damage from minor front-end impacts. Fortunately, it's an inexpensive and easy part to replace.
Symptoms of a Bad Ambient Air Temperature Sensor
Here are the most common signs that your Acadia's sensor needs attention:
- Incorrect Outside Temperature Reading: This is the most obvious symptom. The display on your dashboard might be stuck on one temperature, show a reading that is wildly inaccurate (like 35°F on a hot day), or display an error like "--" or -40°F.
- Automatic Climate Control Problems: If you use the "Auto" setting, you might notice it doesn't work correctly. The system may blow warm air when you expect cold, or vice-versa, because it's receiving bad information from the sensor.
- A/C Compressor Won't Turn On: Some systems will prevent the A/C compressor from engaging if the sensor reports that it's freezing outside. If your sensor is stuck on a low reading, it could disable your air conditioning.
- Check Engine Light: A failed sensor can trigger the Check Engine Light. A code scan will often reveal codes like P0073 (Ambient Air Temperature Sensor Circuit High). 🎬 See how to diagnose and fix a P0073 trouble code.
Known Issue for 2017-2023 Models: TSB 16-NA-051
General Motors issued a Technical Service Bulletin (TSB) for second-generation Acadias (2017 and newer) regarding moisture getting into the sensor's wiring harness. This can cause corrosion and lead to sensor failure and related issues with the vehicle's active aero shutters. The TSB advises that if corrosion is found on the sensor's electrical connector, the sensor itself should be replaced along with repairing the wiring. When replacing the sensor, it's a good idea to inspect the connector for any green or white crusty buildup.
Choosing the Right Aftermarket Sensor
For a simple electronic part like this, an aftermarket sensor is a very practical choice. The original equipment (OEM) part from GM/ACDelco is often competitively priced, but quality aftermarket brands offer reliable alternatives that meet or exceed original specifications.
- Dorman: Dorman is a well-known brand that specializes in creating direct replacement parts. Their sensors are designed to match the fit and function of the original and are a cost-effective and reliable solution.
- Standard Ignition (SMP): Standard is a long-standing, reputable manufacturer of automotive electronics. They are a trusted choice for sensors and other engine management components.
Pro Tip: Given the low cost of this part, there is little risk in choosing a quality aftermarket brand. Both Dorman and Standard Ignition are solid choices for your Acadia.
Typical Replacement Costs
Replacing the ambient air temperature sensor is one of the more affordable repairs you can perform on your vehicle.
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket (Dorman, Standard) | $13 - $15 |
| New OEM (ACDelco / GM) | $6 - $18 |
| Shop Labor | $50 - $100 |
Frequently Asked Questions (FAQ)
Where is the ambient air temperature sensor located on a GMC Acadia?
The sensor is almost always located at the front of the vehicle, behind the grille and in front of the A/C condenser and radiator. On the 2017-2023 Acadia, it is often found in the lower grille area, sometimes on the passenger side. 🎬 Watch this quick walkthrough to find and replace the sensor. Its position makes it easy to access from underneath the front bumper.
Can I replace this sensor myself?
Yes, this is an excellent DIY job for beginners. It is a simple plug-and-play part. The process involves locating the sensor, disconnecting the electrical connector, releasing a clip to remove the old sensor, and snapping the new one into place. No special tools are required.
Do I need to reset the computer after replacing the sensor?
Often, the system will recognize the new sensor and begin reading correctly on its own after a few drive cycles. If you had a Check Engine Light, you may need to clear the code with an OBD2 scanner, or it may clear itself after the computer confirms the fix.
Is it safe to drive with a bad ambient air temperature sensor?
Yes, it is safe to drive. A bad sensor will not leave you stranded. However, your automatic climate control will not function properly, which can be a significant inconvenience in very hot or cold weather.
Helpful Videos
Technical Specifications
OEM Part Numbers: 25775833 13583411
This sensor is a thermistor, which is a type of resistor whose resistance changes with temperature. It typically has a 2-pin electrical connector and clips into a mount behind the front grille.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
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