1. Introducció
This instruction manual provides essential information for the proper installation, operation, and maintenance of the Dorman 601-387 Radiator Shutter Assembly. This component is designed to match the fit and function of the original equipment active grille shutter system, restoring its functionality in compatible vehicles.
Compatibilitat de vehicles: This assembly is compatible with Chevrolet Silverado 1500 models from 2019, 2020, and 2021. Always verify fitment for your specific vehicle trim before proceeding with installation.
2. Informació de seguretat
Sempre observeu les següents precaucions de seguretat quan treballeu al vostre vehicle:
- Ensure the vehicle is turned off, the ignition is disabled, and the battery is disconnected before beginning any work.
- Utilitzeu l'equip de protecció individual adequat, incloent-hi ulleres i guants de seguretat.
- Treballar en una zona ben ventilada.
- If you are unsure about any step, consult a qualified automotive technician or your vehicle's service manual.
- Keep all tools and parts organized to prevent loss or damage.
3. Contingut del paquet
En obrir el paquet, comproveu que tots els components hi són i no estan danyats:
- 1 Active Grille Shutter Assembly (Dorman 601-387)
If any items are missing or damaged, please contact Dorman customer support immediately.
4. Instruccions d'instal·lació
The Dorman 601-387 Radiator Shutter Assembly is designed for a direct replacement and features a factory-style electrical connector for a plug-and-play installation. However, due to the complexity of automotive systems, professional installation is recommended. Always refer to your vehicle's specific service manual for detailed removal and installation procedures.
4.1 General Overview of the Assembly

Figura 1: Davant view of the Dorman 601-387 Radiator Shutter Assembly, showing the active grille slats.

Figura 2: posterior view of the Dorman 601-387 Radiator Shutter Assembly, illustrating the structural components.
4.2 Connexió elèctrica
The assembly includes a factory-style electrical connector designed for direct compatibility with your vehicle's wiring harness. Ensure this connection is secure and free from debris.

Figura 3: Detallada view of the electrical connector for the shutter assembly, ensuring a secure plug-and-play connection.

Figura 4: An alternative close-up of the electrical connector, highlighting its design for easy integration.
4.3 Shutter Mechanism
The active grille shutter mechanism consists of multiple slats that open and close to regulate airflow. Ensure these slats move freely before and after installation.

Figura 5: Detallada view of the shutter slats and their pivot points, which control airflow.

Figura 6: An additional close-up of the shutter mechanism, showing the intricate design for precise airflow regulation.
4.4 Installation Context
The active grille shutter assembly is typically located behind the front grille of the vehicle. Installation involves removing the front bumper cover and potentially other components to access the mounting points.

Figura 7: An automotive technician demonstrating the installation process of a radiator shutter assembly into a vehicle's front end.
After installation, reconnect the battery and test the active grille shutter system to ensure proper operation. If any warning lights appear on the dashboard, consult your vehicle's diagnostic system or a qualified technician.
5. Principis de funcionament
The active grille shutter system is an integral part of modern vehicle thermal management and aerodynamic efficiency. It operates automatically based on various factors:
- Temperatura del motor: When the engine is cold, the shutters remain closed to help the engine reach its optimal operating temperature faster, improving fuel efficiency and reducing emissions.
- Velocitat del vehicle: At higher speeds, the shutters may close to improve the vehicle's aerodynamics, reducing drag and enhancing fuel economy.
- Cooling Demand: When the engine requires more cooling (e.g., during heavy loads, high ambient temperatures, or air conditioning use), the shutters will open to allow maximum airflow to the radiator.
The system is controlled by the vehicle's engine control unit (ECU), which monitors sensors to determine the optimal shutter position.
6. Manteniment
The Dorman 601-387 Radiator Shutter Assembly is designed for durability and requires minimal routine maintenance. However, periodic inspection can help ensure its longevity and proper function:
- Inspecció visual: Periodically check the shutter slats for any signs of physical damage, cracks, or obstructions (e.g., leaves, debris).
- Neteja: Keep the area around the grille shutters clean to prevent debris from interfering with their movement. Use a soft cloth and mild cleaner if necessary.
- Comprovació de moviment: If accessible and safe to do so, observe the shutters' movement (e.g., during engine warm-up or after driving) to ensure they open and close smoothly without binding.
Avoid using high-pressure washers directly on the shutter mechanism, as this could potentially damage sensitive components.
7. Solució De Problemes
If you experience issues with your active grille shutter system after installing the Dorman 601-387 assembly, consider the following common troubleshooting steps:
| Símptoma | Causa possible | Solució |
|---|---|---|
| Check Engine Light / Warning Message | Faulty electrical connection, sensor issue, or motor malfunction. |
|
| Shutters not opening/closing | Obstruction, motor failure, or control module issue. |
|
| Unusual noises from grille area | Debris caught in mechanism, damaged motor, or loose components. |
|
For complex issues or if troubleshooting steps do not resolve the problem, it is advisable to consult a certified automotive technician.
8. Especificacions del producte
| Especificació | Detall |
|---|---|
| Marca | Dorman |
| Número de model | 601-387 |
| Número de peça del fabricant | 601-387 |
| Número de peça OEM | 84652494 |
| Pes de l'article | 14.33 lliures |
| Dimensions del producte | 47.44 x 23.42 x 8.07 polzades |
| Acabat exterior | Ready To Paint If Needed |
| Vehicles compatibles | Chevrolet Silverado 1500 (2019, 2020, 2021) |
9. Garantia i Suport
Dorman products are manufactured to high-quality standards. For specific warranty information regarding your Dorman 601-387 Radiator Shutter Assembly, please refer to the warranty documentation included with your purchase or visit the official Dorman weblloc.
For technical assistance, installation questions, or to report any issues, please contact Dorman customer support:
- Oficial de Dorman Weblloc: www.dormanproducts.com
- Refer to the product packaging for direct contact information.