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Arnott RH-3720 Headlight Level Sensor - Rear Left
| Brand | Arnott RH-3720 |
|---|---|
| Position | Rear Left |
| Connector Color | Black |
| Terminal Type | Pin |
| Grade Type | Standard |
| Connector Quantity | 1 |
| Connector Shape | Oval |
| Terminal Quantity | 3 |
| Connector Gender | Female |
| Terminal Gender | Male |
| Mounting Hardware Included | No |
| New Or Remanufactured | New |
| Fits | Cadillac, Chevrolet, and GMC · 30 vehicles |
Ride height sensor. Measures chassis distance to help keep suspension level.
New replacement part. Built as a standard aftermarket sensor for dependable service.
Oval connector. Features a black female plug with three male terminals.
Cross-references 23152100 for the same application. See all 1.
Arnott RH-3720 Headlight Level Sensor
Arnott RH-3720 is a new rear left headlight level sensor for vehicles equipped with air suspension height control. It measures chassis-to-road distance and sends that input to the ECU so the system can adjust ride height as needed. This replacement is built for 2015-2020 Cadillac Escalade, Cadillac Escalade ESV, Chevrolet Tahoe, GMC Yukon, and GMC Yukon XL applications.
Key Features
- New standard-grade headlight level sensor
- Black female connector with oval shape
- 3-pin male terminal design
- Rear left position application
- Direct replacement for OE-style ride height sensing
- Cross-references Monroe Shocks & Struts 23152100 for the same application
How It Works
The Arnott RH-3720 monitors suspension position and relays that information to the vehicle control system. On 2015-2020 Cadillac Escalade and Escalade ESV, as well as Chevrolet Tahoe, GMC Yukon, and GMC Yukon XL models, this rear left sensor helps the ECU command the air suspension compressor to raise or lower the vehicle as needed. The RH-3720 is a practical replacement when the original sensor has worn out or been damaged by road debris, water, salt, or impact.
Common Problems This Part Can Address
- Incorrect ride height readings from a failing rear left sensor
- Air suspension compressor cycling due to inaccurate sensor input
- Uneven vehicle stance on Cadillac Escalade, Chevrolet Tahoe, or GMC Yukon models
- Suspension warning lights related to height sensor faults
- Damage from corrosion, road splash, or debris impact
Installation Notes
Verify rear left fitment before installation on 2015-2020 Cadillac Escalade, Cadillac Escalade ESV, Chevrolet Tahoe, GMC Yukon, or GMC Yukon XL. Inspect the connector, terminals, and mounting points for corrosion or damage before connecting the new sensor. After installation, clear any stored suspension fault codes and confirm the system responds correctly to ride height changes.
Quality Assurance
Arnott supplies this RH-3720 as a new replacement sensor built to restore proper ride height signal input for air suspension systems. Its standard-grade construction and OE-style connector layout support reliable service in the specified rear left applications.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2020 | Cadillac | Escalade | Rear Left | — |
| 2020 | Cadillac | Escalade ESV | Rear Left | — |
| 2020 | Chevrolet | Tahoe | Rear Left | — |
| 2020 | GMC | Yukon | Rear Left | — |
| 2020 | GMC | Yukon XL | Rear Left | — |
| 2019 | Cadillac | Escalade | Rear Left | — |
| 2019 | Cadillac | Escalade ESV | Rear Left | — |
| 2019 | Chevrolet | Tahoe | Rear Left | — |
| 2019 | GMC | Yukon | Rear Left | — |
| 2019 | GMC | Yukon XL | Rear Left | — |
| 2018 | Cadillac | Escalade | Rear Left | — |
| 2018 | Cadillac | Escalade ESV | Rear Left | — |
| 2018 | Chevrolet | Tahoe | Rear Left | — |
| 2018 | GMC | Yukon | Rear Left | — |
| 2018 | GMC | Yukon XL | Rear Left | — |
| 2017 | Cadillac | Escalade | Rear Left | — |
| 2017 | Cadillac | Escalade ESV | Rear Left | — |
| 2017 | Chevrolet | Tahoe | Rear Left | — |
| 2017 | GMC | Yukon | Rear Left | — |
| 2017 | GMC | Yukon XL | Rear Left | — |
| 2016 | Cadillac | Escalade | Rear Left | — |
| 2016 | Cadillac | Escalade ESV | Rear Left | — |
| 2016 | Chevrolet | Tahoe | Rear Left | — |
| 2016 | GMC | Yukon | Rear Left | — |
| 2016 | GMC | Yukon XL | Rear Left | — |
| 2015 | Cadillac | Escalade | Rear Left | — |
| 2015 | Cadillac | Escalade ESV | Rear Left | — |
| 2015 | Chevrolet | Tahoe | Rear Left | — |
| 2015 | GMC | Yukon | Rear Left | — |
| 2015 | GMC | Yukon XL | Rear Left | — |
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