AutoCodes – GMC – U0284 GMC

U0284 GMC Code - Lost Communication With Active Grille Air Shutter 1 Motor Module

Quick Answer

The active grille air shutter actuator closes louvers at the front bumper to enhance vehicle aerodynamics in driving situations where cooling and A/C loads are relatively low and high levels of front-end airflow are not required. Common causes include Faulty Active Grille Air Shutter 1 Motor Module, Active Grille Air Shutter 1 Motor Module harness is open or shorted, Active Grille Air Shutter 1 Motor Module circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: U0284 GMC indicates Lost Communication With Active Grille Air Shutter 1 Motor Module.
Common causes: Common causes include Faulty Active Grille Air Shutter 1 Motor Module, Active Grille Air Shutter 1 Motor Module harness is open or shorted, Active Grille Air Shutter 1 Motor Module circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 8,094

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jan 25, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0284 GMC Description

The active grille air shutter actuator closes louvers at the front bumper to enhance vehicle aerodynamics in driving situations where cooling and A/C loads are relatively low and high levels of front-end airflow are not required. If high levels of airflow are required, the active grille air shutter actuator opens the louvers. The control signal from the chassis control module, ignition, and ground circuits enables the active grille air shutter actuator to operate. If the conditions for opening the louvers are reached the chassis control module commands the active grille air shutter actuator to open the louvers.

OBDII Code U0284 GMC - Lost Communication With Active Grille Air Shutter 1 Motor Module - AutoCodes.com — U0284 GMC Code - Lost Communication With Active Grille Air Shutter 1 Motor Module

What does this mean?

What are the Possible Causes of the DTC U0284 GMC?

Faulty Active Grille Air Shutter 1 Motor Module
Active Grille Air Shutter 1 Motor Module harness is open or shorted
Active Grille Air Shutter 1 Motor Module circuit poor electrical connection

How to Fix the DTC U0284 GMC?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U0284 GMC code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the U0284 GMC code?

Need more information on how to fix the U0284 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about U0284 GMC Code

1. What are the common symptoms of OBDII code U0284 in a GMC related to the Active Grille Air Shutter 1 Motor Module?

The common symptoms include the Active Grille Air Shutter 1 not responding to commands, the grille staying in a fixed position, and a warning light illuminating on the dashboard.

2. What are some possible causes of the U0284 code in a GMC?

Possible causes include a malfunctioning Active Grille Air Shutter 1 Motor Module, damaged wiring or connectors related to the module, or a communication error between the module and the vehicle's onboard computer.

3. How can I diagnose the U0284 code related to the Active Grille Air Shutter 1 Motor Module in my GMC?

Diagnosis involves using a diagnostic scanner to retrieve the trouble code, inspecting the wiring and connectors for damage, and testing the functionality of the Active Grille Air Shutter 1 Motor Module.

4. What are some repair tips for fixing the U0284 code in a GMC?

Repair tips may include repairing or replacing damaged wiring or connectors, resetting the module to recalibrate it, or replacing the Active Grille Air Shutter 1 Motor Module if it is faulty.

5. Can I drive my GMC with the U0284 code related to the Active Grille Air Shutter 1 Motor Module?

It is not recommended to drive the vehicle with this code present, as it can affect the proper operation of the Active Grille Air Shutter system, potentially impacting engine performance and fuel efficiency.

6. How much does it typically cost to repair the U0284 code in a GMC?

The cost of repair can vary depending on the exact cause of the code, but it may range from a simple wiring repair costing a few hundred dollars to a module replacement costing over a thousand dollars.

7. Can I reset the U0284 code in my GMC by disconnecting the battery?

While disconnecting the battery may clear the code temporarily, it is not a recommended method for resolving the underlying issue causing the U0284 code related to the Active Grille Air Shutter 1 Motor Module.

8. Is the U0284 code specific to GMC vehicles only?

No, the U0284 code related to Lost Communication With Active Grille Air Shutter 1 Motor Module can appear in other vehicle makes and models with similar Active Grille Air Shutter systems.

9. How urgent is it to address the U0284 code in my GMC?

It is important to address the U0284 code promptly to ensure proper functioning of the Active Grille Air Shutter system and prevent potential issues with engine cooling, aerodynamics, and fuel efficiency.

10. Can a DIY enthusiast fix the U0284 code issue in a GMC, or is it best left to professionals?

Depending on the skill level and tools available, some DIY enthusiasts may be able to diagnose and repair the U0284 code related to the Active Grille Air Shutter 1 Motor Module, but complex issues may require professional expertise.